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Health Risk Assessment of Employees Exposed to Chlorination By-products of Recreational Water in Large Amusement Parks in Shanghai
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作者 Weizhao Cao Yiming Zheng +4 位作者 Wenxuan Zhao Lisha Shi Yunhui Zhang Lijun Zhang Jian Chen 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2024年第8期865-875,共11页
Objective Chlorination is often used to disinfect recreational water in large amusement parks;however,the health hazards of chlorination disinfection by-products(DBPs)to occupational populations are unknown.This study... Objective Chlorination is often used to disinfect recreational water in large amusement parks;however,the health hazards of chlorination disinfection by-products(DBPs)to occupational populations are unknown.This study aimed to assess the exposure status of chlorinated DBPs in recreational water and the health risks to employees of large amusement parks.Methods Exposure parameters of employees of three large amusement parks in Shanghai were investigated using a questionnaire.Seven typical chlorinated DBPs in recreational water and spray samples were quantified by gas chromatography,and the health risks to amusement park employees exposed to chlorinated DBPs were evaluated according to the WHO's risk assessment framework.Results Trichloroacetic acid,dibromochloromethane,bromodichloromethane,and dichloroacetic acid were detected predominantly in recreational water.The carcinogenic and non-carcinogenic risks of the five DBPs did not exceed the risk thresholds.In addition,the carcinogenic and non-carcinogenic risks of mixed exposure to DBPs were within the acceptable risk limits.Conclusion Typical DBPs were widely detected in recreational water collected from three large amusement parks in Shanghai;however,the health risks of DBPs and their mixtures were within acceptable limits. 展开更多
关键词 Risk assessment WATER Environmental health Occupational exposure Chlorinated disinfection by-product
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Lipase and photodecarboxylase coexpression: A potential strategy for alkane-based biodiesel production from natural triglycerides
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作者 Yong-Yi Zeng Xin-Yi Xu +4 位作者 Jin-Xuan Xie Wen-Li Chen Lan Liu Xin-Jian Yin Bi-Shuang Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第3期238-246,共9页
Alkane-based biodiesel is considered the next generation of biodiesel owing to its potential environmental benefits and the fact that it exhibits much higher specific caloric values than traditional biodiesel.However,... Alkane-based biodiesel is considered the next generation of biodiesel owing to its potential environmental benefits and the fact that it exhibits much higher specific caloric values than traditional biodiesel.However,the formidable obstacle impeding the commercialization of this cutting-edge fuel alternative lies in the cost associated with its production.In this study,an engineered strain Escherichia coli(E.coli)showcasing harmonized coexpression of a lipase(from Thermomyces lanuginosus lipase,TLL)and a fatty acid photodecarboxylase(from Chlorella variabilis,CvFAP)was first constructed to transform triglycerides into alkanes.The potential of E.coli BL21(DE3)/pRSFDuet-1-TLL-CvFAP for alkane synthesis was evaluated with tripalmitin as a model substrate under various process conditions.Following a comprehensive examination of the reaction parameters,the scope of the biotransformation was expanded to‘real’substrates(vegetable oils).The results showed that bioderived oils can be transformed into alkanes with high yields(0.80-10.20 mmol·L^(-1))under mild conditions(35℃,pH 8.0,and 36 h)and blue light illumination.The selected processes were performed on an increased lab scale(up to 100 ml)with up to 24.77 mmol·L^(-1) tripalmitin,leading to a yield of 18.89 mmol·L^(-1) pentadecane.With the employment of a method for efficiently producing alkanes under mild conditions and a simple procedure to isolate alkanes from the reaction system,the utilization of sustainable biomass as a fundamental feedstock emerges as the primary solution to lower the cost of alkane-based biodiesel.Thus,this study proposes a readily implementable and highly effective approach for alkane-based biodiesel production. 展开更多
关键词 Alkane-based biodiesel Renewable biomass Co-overexpression LIPASE Photodecarboxylase
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Performance and Emission Characteristics of a CRDI Diesel Engine Fuelled by SiO_(2) Nanoparticle-Waste Fat Biodiesel Blends
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作者 Babu Aurtherson P Dinesh Babu Munuswamy +1 位作者 Ravikumar Jayabal Yuvarajan Devarajan 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2024年第1期56-66,共11页
This study investigates the use of waste fat biodiesel(WFB)from the leather industry as a substitute for diesel fuel.Specifically,it examines the diesel engine performance of WFB,a blend of WFB and diesel(B50),and dif... This study investigates the use of waste fat biodiesel(WFB)from the leather industry as a substitute for diesel fuel.Specifically,it examines the diesel engine performance of WFB,a blend of WFB and diesel(B50),and different blends of WFB and silicon dioxide(SiO_(2))nanoparticles(B50SiO_(2)40,B50SiO_(2)80,and B50SiO_(2)120μg/g).The results indicate that the B50SiO_(2)120 blend increases brake thermal efficiency by 10.03%compared to pure biodiesel but falls 1.93%short of neat diesel.Furthermore,the B50SiO_(2)120 mixture reduces smoke,hydrocarbon,and carbon monoxide emissions by 31.87%,34.14%,and 43.97%respectively,compared to diesel.However,the B50SiO_(2)120 blend shows a 4.91%increase in nitrogen oxide emissions compared to diesel. 展开更多
关键词 waste fat TRANSESTERIFICATION biodiesel silicon dioxide EMISSION
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The Effect of Reaction Temperature, Catalyst Concentration and Alcohol Ratio in the Production of Biodiesel from Raw and Purified Castor Oil
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作者 Sandile Brendon Masango Peterson Thokozani Ngema +1 位作者 Olusegun Ayodeji Olagunju Suresh Ramsuroop 《Advances in Chemical Engineering and Science》 CAS 2024年第3期137-154,共18页
In this study, a homogeneous alkaline catalyst was used in the production of biodiesel from raw and refined castor oil feedstock. The effect of potassium hydroxide (KOH) as a catalyst between the two feedstocks, raw a... In this study, a homogeneous alkaline catalyst was used in the production of biodiesel from raw and refined castor oil feedstock. The effect of potassium hydroxide (KOH) as a catalyst between the two feedstocks, raw and refined castor oil was compared. The transesterification technique was utilized in this study, aiming to investigate the effect of different parameters, which include the reaction temperature, methanol-to-oil mole ratio, and catalyst concentration at a constant period of 90 minutes. The result revealed the performance of the KOH catalyst on raw castor oil yielded 98.49% FAME, which was higher than the refined castor oil which yielded 97.9% FAME. The optimal conditions obtained from refined castor oil were applied to raw castor oil because of the same properties. The fuel quality of castor oil and produced biodiesel were tested for physicochemical properties. 展开更多
关键词 biodiesel Fuel Raw Castor Oil Refined Castor Oil Transesterification Process
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Biodiesel from Palm Vegetable Oil
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作者 Bhawna Yadav Lamba Sapna Jain Shreya Jha 《Natural Resources》 2024年第2期51-60,共10页
Energy obtained from a variety of non-renewable sources is considered unsustainable. Various fossil fuels, such as petroleum, coal, and natural gas, are among these sources. The combustion of fossil fuels resulted in ... Energy obtained from a variety of non-renewable sources is considered unsustainable. Various fossil fuels, such as petroleum, coal, and natural gas, are among these sources. The combustion of fossil fuels resulted in the generation of greenhouse gases, which increased the amount of carbon dioxide in the atmosphere. Global warming and ozone layer degradation are the negative consequences. In a country like India, where consumable oils are still imported, it is sense to look at the possibility of using such unpalatable oils in CI engines that aren’t often utilized as cooking oil. Palm oil is a vegetable oil obtained from the monocarp of the oil palm’s crop. The main goal is to provide a low-cost, high-performance alternative to diesel. The possibility of palm oil as a realistic, modest, and effective hotspot for the generation of biodiesel is investigated in this research. The article is focused on the comparison of palm oil and diesel in terms of characteristics. 展开更多
关键词 biodiesel TRANSESTERIFICATION Palm Oil Heterogeneous Catalyst Methyl Esters Sustainable Fuel Energy
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The Effect of Plant Growth Regulators on Physico-Chemical Properties of Safflower (Carthamus tinctorius L.) Derived Biodiesel
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作者 Charles Mazereku Jerekias Gandure Clever Ketlogetswe 《Open Journal of Applied Sciences》 2024年第4期1052-1069,共18页
Global concerns about the environmental impact of combustion emissions from petroleum fuels influence new research to seek for alternative energy sources. The current study investigates the possibility of using safflo... Global concerns about the environmental impact of combustion emissions from petroleum fuels influence new research to seek for alternative energy sources. The current study investigates the possibility of using safflower (Carthamus tinctorius L.) as an alternative biodiesel raw material. Four plant growth regulators (PGR) were used to boost the production of safflower. Thirteen treatments were constituted from the four plant regulators and applied to the safflower crop arranged in completely randomised design, repeated three times. The results show that the effect of plant growth regulators was not more than that of the control. More studies have to be channelled towards the relationship between safflower and plant growth regulators. 展开更多
关键词 SAFFLOWER biodiesel Plant Growth Regulators
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Progress in Analytical Methods of Halogenated Disinfection By-Products
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作者 Jing Wu 《Proceedings of Business and Economic Studies》 2024年第2期95-99,共5页
Ensuring the health and safety of drinking water is crucial for both nations and their citizens.Since the 20th century,the disinfection of drinking water,effectively controlling pathogens in water sources,has become o... Ensuring the health and safety of drinking water is crucial for both nations and their citizens.Since the 20th century,the disinfection of drinking water,effectively controlling pathogens in water sources,has become one of the significant advances in public health.However,the disinfectants used in the process,such as chlorine and chlorine dioxide,react with natural organic matter in the water to produce disinfection by-products(DBPs).Most of these DBPs contain chlorine,and if the source water contains bromine or iodine,brominated or iodinated DBPs,collectively referred to as Halogenated disinfection byproducts(X-DBPs),are formed.Numerous studies have found that X-DBPs pose potential risks to human health and the environment,leading to widespread concern.Mass spectrometry has become an important means of discovering new types of X-DBPs.This paper focuses on the study of methods for analyzing X-DBPs in drinking water using mass spectrometry. 展开更多
关键词 Halogenated disinfection by-products Drinking water High-resolution mass spectrometry
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Improvement in lipid production and biodiesel quality of Pavlova sp.by monochromatic illumination 被引量:1
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作者 Cuili JIN Miaoping DONG +3 位作者 Yi ZHANG Qiuyan YU Qing LIU Xiaojian ZHOU 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2023年第5期1864-1875,共12页
Pavlova sp.is not only one of the most popular microalgae in aquaculture,but also a source of high-quality biodiesel feedstock.With white light as a control(W),Pavlova sp.was cultured in this study under varying light... Pavlova sp.is not only one of the most popular microalgae in aquaculture,but also a source of high-quality biodiesel feedstock.With white light as a control(W),Pavlova sp.was cultured in this study under varying light quality,including monochromatic red light(R),blue light(B),and combinations thereof with different proportions(illuminators of m Rn B,comprised of m red light units and n blue ones,m+n=7),to examine the effects of illuminating light quality on biocomponent production and biodiesel quality.The results show that combined monochromatic light,especially 2R5B,3R4B,4R3B,and 5R2B,could improve the growth of Pavlova sp.The dry weight of harvested algae powder in the 5R2B group reached 418.03 mg/L,and was 22.65%higher than that in the control group(W).Lipid production under combined monochromatic light of 4R3B reached 107.86 mg/L,and was 25.61%higher than in the control(W).In addition,illumination using 4R3B increased the proportion of C16∶0(palmitic acid)and C16:1(palmitoleic acid)fatty acids in Pavlova sp.by 15.55%and 21.94%,respectively,which translates into improved biodiesel quality.All cetane numbers(CN)for 4R3B–6R1B were over 51,while iodine values(IV)and degrees of unsaturation(DU)were reduced,leading to more stable biodiesel suitable for longterm storage.In addition,protein production under 6R1B was as high as 31.56 mg/L,1.8 times greater than under W.Light quality is proposed as an effective tool to regulate biocomponent production by microalgae. 展开更多
关键词 Pavlova sp. light quality growth LIPID biodiesel
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Experimental Investigation on Macro Spray Characteristics of Octanol-Biodiesel-Diesel Ternary Fuel Blend
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作者 Tian Junjian Qiu Zhicong +3 位作者 Zhao Lifei Li Fengyu Hu Peng Lin Qizhao 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2023年第4期1-15,共15页
This study investigates the spray characteristics of ternary blends composed of octanol, biodiesel, and diesel fuel.Experiments are conducted using six materials to examine the variation in spray characteristic and to... This study investigates the spray characteristics of ternary blends composed of octanol, biodiesel, and diesel fuel.Experiments are conducted using six materials to examine the variation in spray characteristic and to verify and compare a previously established spray tip penetration model with a modified model. The results show that the addition of OB100(30%of octanol, 70% of biodiesel) improves the spray characteristics of the fuel. Specifically, the addition of 10% or 20% of OB100 leads to a slight increase in the spray tip penetration, average spray cone angle, maximum spray width, and the spray area of the fuel blend;however, further addition of OB100 causes a corresponding decrease in these parameters. Based on previous research, this study uses kinematic viscosity instead of dynamic viscosity and density to modify the prediction model of spray tip penetration. The modified model exhibits a better fit quality and agreement with the experimental data,making it more suitable for predicting the spray tip penetration of fuel blends compared to the Hiroyasu-Arai model. 展开更多
关键词 OCTANOL biodiesel ternary fuel blend maximum spray width modified model
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基于by-production技术的中国绿色发展效率测度及差异化研究
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作者 孙广霞 刘雨菲 +1 位作者 刘成业 刘欣悦 《中国矿业》 2023年第8期41-47,共7页
在资源环境约束日益严峻的背景下,如何推动绿色发展,促进人与自然和谐共生成为中国发展道路上的关键问题。通过对中国绿色发展效率进行测度和差异化研究,能更好地把握中国绿色发展现状,进而加快实现经济可持续发展。首先,以中国30个省... 在资源环境约束日益严峻的背景下,如何推动绿色发展,促进人与自然和谐共生成为中国发展道路上的关键问题。通过对中国绿色发展效率进行测度和差异化研究,能更好地把握中国绿色发展现状,进而加快实现经济可持续发展。首先,以中国30个省份为研究对象,引入了DEA框架下by-production技术测度中国绿色发展效率,该技术考虑了非期望产出只由能源投入产得的特征,更加符合实际生产过程。其次,采用Dagum基尼系数进一步探究中国绿色发展效率空间差异及其来源。通过研究发现:样本考察期内,基于by-production技术的中国绿色发展效率整体较高,绿色发展效率均值为0.84,但仍有提升空间;绿色发展效率的地区差距显著,且呈上升趋势。其中,区域间差距是最主要来源,平均贡献率为44.12%;西部地区区域内绿色发展效率差异最大;东部地区和东北地区区域间差异最大。因此,要加强区域间绿色发展交流合作,实现区域绿色协同发展。最后,针对所得结论提出了对策建议,为经济社会发展全面绿色转型提供决策参考,有助于推动实现经济效益与环境效益相统一。 展开更多
关键词 绿色发展 效率测度 空间差异 DEA模型 by-production技术 Dagum基尼系数
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Effect of Palm Oil Biodiesel Blends on Engine Emission and Performance Characteristics in an Internal Combustion Engine
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作者 Alpha Chukwumela Ajie Mohammed Moore Ojapah Endurance Ogheneruona Diemuodeke 《Open Journal of Energy Efficiency》 2023年第1期13-24,共12页
Increasing global environmental issues and depleting fossil fuel reserves has necessitated the need for alternative and sustainable fuel. In this paper, the effects of biodiesel and its blend on engine emission and pe... Increasing global environmental issues and depleting fossil fuel reserves has necessitated the need for alternative and sustainable fuel. In this paper, the effects of biodiesel and its blend on engine emission and performance characteristics in an internal combustion engine were analyzed. Biodiesel derived from the transesterification of raw palm oil was blended with diesel fuel at different proportions designated as PO5 (5% Biodiesel and 95% Diesel), PO10 (10% Biodiesel and 90% Diesel), PO15 (15% Biodiesel and 85% Diesel), PO20 (20% Biodiesel and 80% Diesel), PO50 (50% Biodiesel and 50% Diesel), PO85 (85% Biodiesel and 15% Diesel), and PO100 (100% Biodiesel). A Lombardini 2-cylinder, four-stroke direct injection diesel engine with a compression ratio of 22.8 was developed using Ricardo Wave software in which diesel, palm oil biodiesel blends and pure biodiesel are used in the model, and the obtained results were analysed and presented. The simulation was done under varying engine speeds of 1200 rpm to 3200 rpm at full load condition. Biodiesel and its blends are more environment-friendly and non-toxic when compared to diesel fuel;it also improves the mechanical efficiency of the engines, and above all can also lead to a reduction in poverty among rural dwellers. The obtained results showed that brake specific fuel consumption and brake thermal efficiency increased with palm oil biodiesel blends as compared to diesel fuel which might be a result of biodiesel’s lower heating value, and the increase in thermal energy may be a result of the oxygenation of the biodiesel blend as compared to pure diesel. In terms of brake torque, palm oil biodiesel blends were lesser than diesel fuel. The CO, HC, and NO<sub>x</sub> emissions of palm oil biodiesel blends decreased significantly compared to that of pure diesel. From this study, palm oil biodiesel emits lesser emissions than diesel fuel and its performance characteristics are similar to diesel fuel. Therefore, palm oil biodiesel can be used without any modifications directly in a diesel engine. In addition, it can also be used as blends as an alternative and sustainable fuel, decreasing air pollution, and increasing environmental sustainability. 展开更多
关键词 Diesel Engine biodiesel Palm Oil biodiesel Engine Performance EMISSIONS
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Investigating the Effects of Eichhornia Crassipes Biodiesel and Liquefied Petroleum Gas on the Performance and Emissions of a Dual-Fuel Engine
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作者 Hawraa S.Mohammed Mahmoud A.Mashkour 《Fluid Dynamics & Materials Processing》 EI 2023年第9期2329-2343,共15页
This study considers the effect of Eichhornia Crassipes Biodiesel(ECB)blends on the performances,combustion,and emission characteristics of a direct injection compression ignition engine operated in a dual-fuel mode(D... This study considers the effect of Eichhornia Crassipes Biodiesel(ECB)blends on the performances,combustion,and emission characteristics of a direct injection compression ignition engine operated in a dual-fuel mode(DFM)and equipped with an Exhaust gas recirculation technique(EGR).In particular,a single-cylinder,four-stroke,water-cooled diesel engine was utilized and four modes of fuel operation were considered:mode I,the engine operated with an ordinary diesel fuel;mode II,the engine operated with the addition of 2.4 L/min of lique-fied petroleum gas(LPG)and 20%EGR;mode III,20%ECB with 2.4 L/min LPG and 20%EGR;mode IV,40%ECB with 2.4 L/min LPG and 20%EGR.The operation conditions were constant engine speed(1500 rpm),var-iation of load(25%,50%,75%,and 100%),full load,with a compression ratio of 18,and a time injection of 23°BTDC(Before top died center).With regard to engine emissions,carbon dioxide(CO_(2)),carbon monoxide(CO),hydrocarbons(UHC),and nitrogen oxide(NOX)were measured using a gas analyzer.The smoke opacity was measured using an OPABOX smoke meter.By comparing the results related to the different modes with mode I at full load,the BTE(Brake thermal efficiency)increased by 20.17%,11.45%,and 12.66%with modes II,III,and IV,respectively.In comparison to the results for mode II,the BTE decreased due to the combustion of ECB blends by 7.26%and 6.24%for mode III and mode IV,respectively,at full load.In comparison to mode II,the Brake specific energy consumption(BSEC)increased with the ECB substitution.With ECB blends,there is a noticeable decrease in the CO,CO_(2),and UHC emissions at a partial load.Furthermore,the 20%ECB has no effect on CO emissions at full load.For modes II and IV,the CO_(2)increased by 33.33%and 19%,respectively,while the UHC emissions were reduced by 14.49%for mode III and 26.08%for mode IV.The smoke of mode III was lower by 7.21%,but for mode IV,it was higher by 12.37%.In addition,with mode III and mode IV,the NOx emissions increased by 30.50%and 18.80%,respectively. 展开更多
关键词 Eichhornia Crassipes biodiesel dual-fuel engine liquefied petroleum gas COMBUSTION diesel engine brake thermal efficiency
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Valorization of Griffonia simplicifolia Seed Oil for Biodiesel Production: A Sustainable Alternative
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作者 Kosi Mawuéna Novidzro Kwami Aldo Eric Kolor +1 位作者 Sassou Megnassan Kossi Honoré Koumaglo 《Engineering(科研)》 2023年第11期759-781,共23页
Bio-derived oxygenated hydrocarbons, such as mixtures of fatty acid methyl esters (biodiesel), are promising alternatives for alleviating the adverse effects of fossil fuel consumption on climate change and preventing... Bio-derived oxygenated hydrocarbons, such as mixtures of fatty acid methyl esters (biodiesel), are promising alternatives for alleviating the adverse effects of fossil fuel consumption on climate change and preventing petroleum resource depletion. However, the selection of a viable feedstock for competitive biodiesel production remains challenging. Recent studies focusing on Griffonia simplicifolia seeds, the sole plant industrially exploited for 5-hydroxy- tryptophan (5-HTP) extraction, have shown that G. simplicifolia seed oil (GSO) can be solvent-extracted directly from ground seeds or the remaining seed cakes obtained after 5-HTP extraction with quantitative yields. This work documents the conversion of GSO into biodiesel through homogeneous base-catalyzed transesterification. The refractive index and density of the obtained methyl ester mixtures decreased with increasing oil-to-methanol molar ratio, reaction temperature, and time. Under specific conditions, 1.43 wt% FFA oil, 63.5C, 60 min, and 1:9 oil/MeOH molar ratio with 1.2 wt% NaOH or 1.3 wt% KOH as catalysts, optimal reaction conditions were reached. There were no significant differences in the potential for diminution of the refractive index and density between the NaOH and KOH catalysts. The predicted fuel properties based on the fatty acid composition determined by GC-MS showed that G. simplicifolia biodiesel exhibited a cetane index of 50.29, volumetric energy density of 34.97 MJ/L, cloud point of -1.03°C, kinematic viscosity of 4.07 mm<sup>2</sup>/s, and oxidative stability of 0.65 h. Apart from its unfavorable oxidative stability and slightly lower energy density compared to petrodiesel, all other calculated parameters met the current standards. The valorization concept proposed in this study should be integrated into the 5-HTP extraction process, preferably using the remaining dry seed cakes as raw materials to maximize revenue in a bioeconomic and sustainable approach. 展开更多
关键词 Griffonia simplicifolia Seed Cakes Vegetable Oil biodiesel
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Biodiesel Production from Rhynchophorus ferrugineus Larvae Oil: Physichochemical Properties and Acid Composition of Oil as Affected by Oil Extraction Protocol
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作者 Arnaude Folepe Azemo Esther Julius K. Tangka Nsah-ko Tchoumboue 《Journal of Sustainable Bioenergy Systems》 2023年第4期117-130,共14页
Biodiesel, a renewable energy source made from natural oils and fats, can be produced using white raffia larvae as a raw material. These larvae have a high lipid content and a short life cycle, making them suitable fo... Biodiesel, a renewable energy source made from natural oils and fats, can be produced using white raffia larvae as a raw material. These larvae have a high lipid content and a short life cycle, making them suitable for this purpose. One crucial step in biodiesel production is oil extraction, and this study aimed to investigate how the extraction protocol affects the fuel properties of the oil. To study the impact of solvent type, solvent volume, and residence time on oil yield, 200 grams of Rhynchophorus ferrugineus were used in a Soxhlet extractor. The researchers examined the physicochemical properties and fatty acid composition of the crude grease using the European biodiesel standard (EN14214) and gas chromatography methods, respectively. The study found that hexane as a solvent produced the highest oil yield (64.44%) during a four-hour extraction period with a solvent ratio of 300 ml. Furthermore, the hexane-extracted oil had the highest iodine number (3.02 g/100 g) and cetane number (55.69). These values indicate favorable properties for biodiesel production. The Rhynchophorus ferrugineus larvae oil proved to be a rich source of monounsaturated fatty acids (76%), which were found to be significantly affected by the solvent type. Based on quality assessment, Rhynchophorus ferrugineus can be suitable for biodiesel production. In summary, under the given operational conditions, hexane is the most suitable solvent for Rhynchophorus ferrugineus oil extraction for biodiesel production. Further research in optimizing the extraction process can contribute to the efficient utilization of renewable energy sources like white raffia larvae for biodiesel production. 展开更多
关键词 biodiesel Extraction Process Fatty Acid Composition Physico-Chemical Properties Rhynchophorus ferrugineus Larvae
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全球生物柴油产业发展现状及其对我国植物油安全的影响 被引量:1
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作者 王辽卫 孙恒 +1 位作者 丁艳明 张立伟 《中国油脂》 CAS CSCD 北大核心 2024年第5期8-13,共6页
近年来,全球生物柴油产业快速发展,用于生产生物柴油的植物油消费量持续增加,对我国植物油供给稳定造成影响。对全球生物柴油整体发展情况、生物柴油产业发展影响因素、主要生产国生物柴油政策、生物柴油产业发展前景等进行研究,分析了... 近年来,全球生物柴油产业快速发展,用于生产生物柴油的植物油消费量持续增加,对我国植物油供给稳定造成影响。对全球生物柴油整体发展情况、生物柴油产业发展影响因素、主要生产国生物柴油政策、生物柴油产业发展前景等进行研究,分析了全球生物柴油产业发展对我国植物油安全的影响,并提出相关建议。生物柴油产业发展改变了全球植物油消费结构、贸易流向,对我国油脂油料进口构成威胁,影响我国植物油供给安全。建议发展中国特色的生物柴油产业,提高我国油脂油料自给率,推动植物油多元化进口,确保我国植物油供给安全,同时呼吁生物柴油生产国优先保障食用消费,合理发展生物柴油。 展开更多
关键词 生物柴油 植物油 消费结构 贸易流向 供给安全
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运用米勒循环与生物柴油对柴油机性能优化分析
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作者 胡玲玲 辛华健 +4 位作者 李晓萍 胡杰 姜峰 曹文通 周俊明 《广西科技大学学报》 CAS 2024年第2期9-16,共8页
本文基于GT-Power软件,对比分析了B20生物柴油在1000 r/min转速、2种负荷工况(100%和50%)下的2种米勒循环最佳方案,找到关于动力、经济、排放性能最佳的进气门提前关闭角;再基于米勒循环方案,对其性能进行了优化和分析,得出了B20生物柴... 本文基于GT-Power软件,对比分析了B20生物柴油在1000 r/min转速、2种负荷工况(100%和50%)下的2种米勒循环最佳方案,找到关于动力、经济、排放性能最佳的进气门提前关闭角;再基于米勒循环方案,对其性能进行了优化和分析,得出了B20生物柴油发动机在2种工况下功率、油耗、soot排放与NOx排放最佳性能的进气正时方案。结果表明:变气门重叠角米勒循环在整体性能方面优于变凸轮型线米勒循环,变气门重叠角米勒循环燃用B20生物柴油在2种不同负荷工况下,当处于进气门提前关闭角30℃A时功率性能最佳,并且通过模型优化后2种工况分别在进气门正时179.0℃aA和排气门正时174.0℃aA、进气门正时224.5℃aA和排气门正时119.0℃aA区域内有功率极大值;同理,油耗、soot与NOx排放也同样存在相对应的最佳进气门提前关闭角与优化后相对应的区域。 展开更多
关键词 生物柴油 机车柴油机 米勒循环 性能优化
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米勒循环对柴油机燃用生物柴油的性能研究
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作者 郭琼琳 姜峰 李静 《机械设计与制造》 北大核心 2024年第7期121-127,132,共8页
借助GT-Power软件实现某机车柴油机仿真模型的搭建,采用试验对仿真模型的准确性进行分析验证。研究在75%负载1000r/min工况燃用5种生物柴油B0、B10、B20、B50和B100,分析采用两种米勒循环对柴油机油耗、功率以及排放功能的影响。试验结... 借助GT-Power软件实现某机车柴油机仿真模型的搭建,采用试验对仿真模型的准确性进行分析验证。研究在75%负载1000r/min工况燃用5种生物柴油B0、B10、B20、B50和B100,分析采用两种米勒循环对柴油机油耗、功率以及排放功能的影响。试验结果表明:柴油机功率发生变化拐点在30℃A米勒度处,油耗变化拐点在30℃A米勒度,碳烟排放发生变化拐点在20℃A米勒度,在该工况条件下NOx排放降低的效果较为显著。综合分析可知,在75%负载1000r/min工况条件下燃用B10生物柴油,米勒度为30℃A且变气阀重叠角米勒循环下柴油机表现最为佳。 展开更多
关键词 生物柴油 大功率柴油机 性能优化 米勒循环
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喷射策略对RCCI燃烧影响的试验
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作者 李玉兰 王谦 +2 位作者 相英杰 刘旭 曹礼轩 《江苏大学学报(自然科学版)》 CAS 北大核心 2024年第4期411-416,共6页
为了分析不同喷油策略对反应活性控制压燃(reactivity controlled compression ignition,RCCI)燃烧着火性能与燃烧性能的影响,使用汽油和柴油/加氢催化生物柴油(hydrocatalytic biodiesel,HCB)在光学发动机内进行了试验研究.结果表明:柴... 为了分析不同喷油策略对反应活性控制压燃(reactivity controlled compression ignition,RCCI)燃烧着火性能与燃烧性能的影响,使用汽油和柴油/加氢催化生物柴油(hydrocatalytic biodiesel,HCB)在光学发动机内进行了试验研究.结果表明:柴油/汽油RCCI燃烧较HCB/汽油需要的进气温度高,着火延迟期也较高,随着进气温度的增加,燃烧相位提前,着火延迟期减小;当柴油所含能量与燃料循环总能量之比从30%提高至40%时,缸内压力升高,进气温度对燃烧的影响减小;在HCB/汽油RCCI燃烧模式下,HCB喷油时刻从进气上止点后的曲轴转角-30.0°延迟至-20.0°后,燃烧过程对进气温度的敏感度降低;在光学发动机试验中,采用较高的进气温度有利于更好地实现RCCI稳定燃烧,但进气温度低于30℃时,可以通过推迟高活性燃料喷射时刻或提高高活性燃料质量分数来实现稳定着火燃烧,达到控制燃烧相位的目的. 展开更多
关键词 反应活性控制压燃 加氢催化生物柴油 汽油 可视化 喷射策略
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Fe_(3)O_(4)@CuMOF催化文冠果油制备生物柴油的研究
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作者 郝一男 王任飞 +5 位作者 张国 王晶文 任志远 沈洪霞 王德刚 姚利宏 《林产工业》 北大核心 2024年第7期28-34,共7页
金属有机框架(MOFs)材料的高表面积、结构稳定性和可调功能使其成为制备生物柴油的理想催化剂。本文通过溶剂热法制备磁性Fe_(3)O_(4)@Cu MOF催化剂,利用傅里叶红外变换光谱(FTIR)、扫描电镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)、N2... 金属有机框架(MOFs)材料的高表面积、结构稳定性和可调功能使其成为制备生物柴油的理想催化剂。本文通过溶剂热法制备磁性Fe_(3)O_(4)@Cu MOF催化剂,利用傅里叶红外变换光谱(FTIR)、扫描电镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)、N2吸脱附(BET)、热重分析(TG)等手段对催化剂的微观结构和热稳定性进行表征,并应用于文冠果油制备生物柴油的反应中。结果表明:Fe_(3)O_(4)@Cu MOF催化剂表面粗糙多孔,比表面积为206.239 m^(2)/g,平均孔径为6.64 nm,属于介孔材料。Fe_(3)O_(4)@Cu MOF的饱和磁化强度为12.6 emu/g,易分离回收。当催化剂用量为3 wt%、醇油摩尔比为20∶1、反应温度为60℃、反应时间为2 h时,生物柴油产率最高,为75.0%。Fe_(3)O_(4)@Cu MOF循环使用5次后,其催化生物柴油的产率仍能达到69.25%。 展开更多
关键词 Fe_(3)O_(4)@Cu MOF催化剂 生物柴油 文冠果油 稳定性 产率
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生物柴油基减阻剂研制及滑溜水压裂液体系构建
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作者 杨明 蔡金波 +2 位作者 张莉伟 王瑞 郑存川 《油田化学》 CAS CSCD 北大核心 2024年第3期413-421,共9页
为了解决常规白油基滑溜水体系在运输过程中容易分层以及减阻剂溶解太慢、对环境污染大等问题,首先通过测试不同相对分子质量及水解度的减阻剂F1~F6的溶解性和增黏性能优选了减阻剂F4;通过对稠化剂、分散剂及固液比筛选,研制了配方为34... 为了解决常规白油基滑溜水体系在运输过程中容易分层以及减阻剂溶解太慢、对环境污染大等问题,首先通过测试不同相对分子质量及水解度的减阻剂F1~F6的溶解性和增黏性能优选了减阻剂F4;通过对稠化剂、分散剂及固液比筛选,研制了配方为34.0%生物柴油+3.0%稠化剂F-120+3.0%分散剂S-85+60.0%减阻剂F4的生物柴油基悬浮减阻剂,并将生物柴油基悬浮减阻剂与助排剂、防膨剂构建变黏滑溜水压裂液体系。实验结果表明,减阻剂F4在180℃下恒温剪切2 h后的表观黏度保留率为33.0%,热稳定性较好;变黏滑溜水压裂液具有良好的抗剪切能力和抗温性能,在剪切速率为170 s^(-1)下长期剪切后,常温下黏度保留率均可达90%以上,90℃下黏度保留率均达50%以上,其中高黏滑溜水压裂液黏度保留率可高达70%以上,低黏滑溜水压裂液的减阻率可达70%以上;高黏滑溜水压裂液的携砂性能比低、中黏滑溜水压裂液的高,且沉降速率最低,为0.005272 m/min。变黏滑溜水压裂液破胶后表面张力均小于27 m N/m,与煤油间的界面张力均小于2.0 mN/m,破胶液黏度均小于5.0mPa·s,且残渣含量均小于50 mg/L,满足标准要求。 展开更多
关键词 生物柴油 悬浮减阻剂 变黏滑溜水 压裂液 性能评价
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