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A highly hydrothermal stable copper-based catalyst for catalytic wet air oxidation of m-cresol in coal chemical wastewater 被引量:2
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作者 Bingxiao Feng Lining Hao +6 位作者 Chaoting Deng Jiaqiang Wang Hongbing Song Meng Xiao Tingting Huang Quanhong Zhu Hengjun Gai 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第5期338-348,共11页
Catalytic wet air oxidation(CWAO) can degrade some refractory pollutants at a low cost to improve the biodegradability of wastewater. However, in the presence of high temperature and high pressure and strong oxidizing... Catalytic wet air oxidation(CWAO) can degrade some refractory pollutants at a low cost to improve the biodegradability of wastewater. However, in the presence of high temperature and high pressure and strong oxidizing free radicals, the stability of catalysts is often insufficient, which has become a bottleneck in the application of CWAO. In this paper, a copper-based catalyst with excellent hydrothermal stability was designed and prepared. TiO_(2) with excellent stability was used as the carrier to ensure the longterm anchoring of copper and reduce the leaching of the catalyst. The one pot sol–gel method was used to ensure the super dispersion and uniform distribution of copper nanoparticles on the carrier, so as to ensure that more active centers could be retained in a longer period. Experiments show that the catalyst prepared by this method has good stability and catalytic activity, and the catalytic effect is not significantly reduced after 10 cycles of use. The oxidation degradation experiment of m-cresol with the strongest biological toxicity and the most difficult to degrade in coal chemical wastewater was carried out with this catalyst. The results showed that under the conditions of 140℃, 2 MPa and 2 h, m-cresol with a concentration of up to 1000 mg·L^(-1) could be completely degraded, and the COD removal rate could reach 79.15%. The biological toxicity of wastewater was significantly reduced. The development of the catalyst system has greatly improved the feasibility of CWAO in the treatment of refractory wastewater such as coal chemical wastewater. 展开更多
关键词 Hydrothermal stability Ultra-dispersed copper-based catalyst catalytic wet air oxidation M-CRESOL Biological toxicity
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Life cycle assessment of high concentration organic wastewater treatment by catalytic wet air oxidation 被引量:1
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作者 Yuxi Chai Yanan Zhang +6 位作者 Yannan Tan Zhiwei Li Huangzhao Wei Chenglin Sun Haibo Jin Zhao Mu Lei Ma 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第4期80-88,共9页
There have been many studies on life cycle assessment in sewage treatment,but there are scarce few studies on the treatment of industrial wastewater in combination with advanced oxidation technology,especially in cata... There have been many studies on life cycle assessment in sewage treatment,but there are scarce few studies on the treatment of industrial wastewater in combination with advanced oxidation technology,especially in catalytic wet air oxidation(CWAO).There are no cases of using actual industrialized data onto life cycle assessment.This paper uses Simapro 9.0 software to establish a life cycle assessment model for the treatment of high-concentration organic wastewater by CWAO,and comprehensively explains the impact on the environment from three aspects:the construction phase,the operation phase and the demolition phase.In addition,sensitivity analysis and uncertainty analysis were performed.The results showed that the key factors affecting the environment were marine ecotoxicity,mineral resource consumption and global warming,the operation stage had the greatest impact on the environment,which was related to high power consumption during operation and emissions from the treatment process.Sensitivity analysis showed that electricity consumption has the greatest impact on abiotic depletion and freshwater aquatic ecotoxicity,and it also proved that global warming is mainly caused by pollutant emissions during operation phase.Monte Carlo simulations found slightly higher uncertainty for abiotic depletion and toxicity-related impact categories. 展开更多
关键词 Wastewater treatment High-concentration organic wastewater catalytic wet air oxidation Life-cycle assessment
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Application of Catalytic Wet Air Oxidation to Treatment of Landfill Leachate on Co/Bi Catalyst 被引量:4
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作者 LIHai-sheng LIULiang +3 位作者 ZHANGRong DONGDe-ming LIUHong-liang LIYu 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第6期711-716,共6页
Catalytic wet air oxidation(CWAO) was employed to reduce the organic compounds in landfill leachate and the effects of temperature, oxygen pressure, catalyst dosage, and concentration of the organic compounds on the T... Catalytic wet air oxidation(CWAO) was employed to reduce the organic compounds in landfill leachate and the effects of temperature, oxygen pressure, catalyst dosage, and concentration of the organic compounds on the TOC and COD Cr removal rates were studied. The degradation kinetics of landfill leachate was also investigated and an exponential experiential model consisting of four influential factors was established to describe the reduction of the organic compounds in the landfill leachate. Meanwhile, the GC-MS technique was used to detect the components of the organic intermediates for the inference of the decomposition mechanisms of the organic compounds in landfill leachate. The results reveal that the reaction temperature and the catalyst dosage are the most important factors affecting the degradation reaction of the organic compounds and that the principal intermediates confirmed by GC-MS are organic acids at a percentage of more than 88% with no aldehydes or alcohols detected. The decomposition mechanisms of the organic compounds in landfill leachate were inferred based on the GC-MS information as follows: the activated gas phase O 2 captured the hydrogen of the organic pollutants to produce free radicals, which then initiated the catalytic reaction. So most of the organic compounds were oxidized into CO 2 and H 2O ultimately. In general, catalytic wet air oxidation over catalyst Co 3O 4/Bi 2O 3 was a very promising technique for the treatment of landfill leachate. 展开更多
关键词 catalytic wet air oxidation Organic compound Landfill leachate Decomposition mechanism
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Catalytic wet air oxidation of phenol over RuO_2/γ-Al_2O_3 catalyst 被引量:3
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作者 YANGShaoxia FENGYujie +3 位作者 CAIWeimin ZHUWanpeng JIANGZhanpeng WANJiafeng 《Rare Metals》 SCIE EI CAS CSCD 2004年第2期131-137,共7页
A kind of CWAO catalyst, RuO_2/γ-Al_2O_3, was prepared by dipping Al_2O_3into the aqueous solution of RuCl_3·3H_2O. XRD, SEM and TEM were used to determine the catalyticstructure. Influences of the calcination t... A kind of CWAO catalyst, RuO_2/γ-Al_2O_3, was prepared by dipping Al_2O_3into the aqueous solution of RuCl_3·3H_2O. XRD, SEM and TEM were used to determine the catalyticstructure. Influences of the calcination temperature, the initial pH of the feed solution anddegradation temperature on the activity of the RuO_2/γ-Al_2O_3 catalyst were investigated and thereaction mechanism was preliminarily studied. Results showed that uniform dispersion of RuO_2crystallites was observed on the surface of the catalyst. The activity of the catalyst was higher atcalcination temperature of 300℃ for 3 h and the particle reunion occurred and some large RuO_2crystallites were abundant at high calcination temperature of 500℃ The activity of the catalyst wasbetter in the acid solution than in the alkaline solution. Increasing degradation temperature andusing the catalyst could shorten the induction periods so that the phenol and COD removal wereincreased. For RuO_2/γ-Al_2O_3 catalyst, the phenol and COD removal were respectively 98% and 80%in a temperature of 150℃, pH of 5.6 and pressure of 3 MPa after a 2 h reaction. This indicated thatRu/γ-Al_2O_3 catalyst had good activity. 展开更多
关键词 environmental engineering catalytic wet air oxidation wastewater treatment ruthenium catalyst
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Pretreatment of apramycin wastewater by catalytic wet air oxidation 被引量:1
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作者 YANGShao-xia FENGYu-jie +3 位作者 WANJia-feng LINQing-ying ZHUWan-peng JIANGZhan-peng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第4期623-626,共4页
The pretreatment technology of wet air oxidation(WAO) and coagulation and acidic hydrolysis for apramycin wastewater was investigated in this paper. The COD, apramycin, NH^+_4 concentration, and the ratio of BOD_5/COD... The pretreatment technology of wet air oxidation(WAO) and coagulation and acidic hydrolysis for apramycin wastewater was investigated in this paper. The COD, apramycin, NH^+_4 concentration, and the ratio of BOD_5/COD were analyzed, and the color and odor of the effluent were observed. WAO of apramycin wastewater, without catalyst and with RuO_2/Al_2O_3 and RuO_2-CeO_2/Al_2O_3 catalysts, was carried out at degradation temperature of 200℃ and the total pressure of 4 MPa in a 1 L batch reactor. The result showed that the apramycin removals were respectively 50 2% and 55 0%, COD removals were 40 0% and 46 0%, and the ratio of BOD_5/COD was increased to 0 49 and 0 54 with RuO_2/Al_2O_3 and RuO_2-CeO_2/Al_2O_3 catalysts in catylytic wet air oxidation(CWAO) after the reaction of 150 min. With the pretreatment of coagulation and acidic hydrolysis, COD and apramycin removals were slight decreased, and the ratio of BOD_5/COD was increased to 0 45, and the effluents was not suitable to biological treatment. The color and odor of the wastewater were effectively controlled and the reaction time was obviously shortened with WAO. HO_2· may promote organic compounds oxidized in WAO of the apramycin wastewater. The addition of CeO_2 could promote the activity and stability of RuO_2/Al_2O_3 in WAO of apramycin wastewater. 展开更多
关键词 catalytic wet air oxidation(CWAO) metal catalyst antibiotic production wastewater apramycin wastewater
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Kinetics study on catalytic wet air oxidation of phenol by several metal oxide catalysts 被引量:1
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作者 WANJia-feng FENGYu-jie +2 位作者 CAIWei-min YANGShao-xia SUNXiao-jun 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2004年第4期556-558,共3页
Four metal oxide catalysts composed of copper(Cu), stannum(Sn), copper-stannum(Cu-Sn) and copper-cerium(Cu-Ce) respectively were prepared by the co-impregnation method, and γ-alumina(γ-Al 2O 3) is selected as supp... Four metal oxide catalysts composed of copper(Cu), stannum(Sn), copper-stannum(Cu-Sn) and copper-cerium(Cu-Ce) respectively were prepared by the co-impregnation method, and γ-alumina(γ-Al 2O 3) is selected as support. A first-order kinetics model was established to study the catalytic wet air oxidation of phenol at different temperature when these catalysts were used. The model simulations are good agreement with present experimental data. Results showed that the reaction rate constants can be significantly increased when catalysts were used, and the catalyst of 6% Cu—10%Ce/γ-Al 2O 3 showed the best catalytic activity. This is consistent with the result of catalytic wet air oxidation of phenol and the COD removal can be arrived at 98.2% at temperature 210℃, oxygen partial pressure 3 MPa and reaction time 30 min. The activation energies of each reaction with different catalysts are nearly equal, which is found to be about 42 kJ/mol and the reaction in this study is proved to be kinetics control. 展开更多
关键词 catalytic wet air oxidation CATALYST PHENOL
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Catalytic wet air oxidation for the treatment of emulsifying wastewater
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作者 ZHAOJian-fu CHENLing +1 位作者 LUYi-cheng TANGWen-wei 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第4期576-579,共4页
The wet air oxidation(WAO) and catalytic WAO(CWAO) of the high strength emulsifying wastewater containing nonionic surfactants have been investigated in terms of COD and TOC removal. The WAO and homogeneous CWAO proce... The wet air oxidation(WAO) and catalytic WAO(CWAO) of the high strength emulsifying wastewater containing nonionic surfactants have been investigated in terms of COD and TOC removal. The WAO and homogeneous CWAO processes were carried out at the temperature from 433 K to 513 K, with initial oxygen pressure 1 2 MPa. It was found that homogeneous catalyst copper(Cu(NO_3)_2) had an fairly good catalytic activity for the WAO process, and the oxidation was catalyzed when the temperature was higher than 473 K. Moreover, several heterogeneous catalysts were proved to be effective for the WAO process. At the temperature 473 K, after 2 h reaction, WAO process could achieve about 75% COD removal and 66% TOC removal, while catalysts Cu/Al_2O_3 and Mn-Ce/Al_2O_3 elevated the COD removal up to 86%—89% and that of TOC up to 82%. However, complete elimination of COD and TOC was proved to be difficult even the best non-noble catalyst was used. Therefore, the effluent from WAO or CWAO process need to be further disposed. The bioassay proved that the effluent from WAO process was amenable to the biochemical method. 展开更多
关键词 CATALYST catalytic wet air oxidation emulsifying wastewater wet air oxidation
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Catalytic wet air oxidation of phenol with functionalized carbon materials as catalysts:Reaction mechanism and pathway 被引量:6
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作者 Jianbing Wang Wantao Fu +2 位作者 Xuwen He Shaoxia Yang Wanpeng Zhu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第8期1741-1749,共9页
The development of highly active carbon material catalysts in catalytic wet air oxidation(CWAO)has attracted a great deal of attention. In this study different carbon material catalysts(multi-walled carbon nanotube... The development of highly active carbon material catalysts in catalytic wet air oxidation(CWAO)has attracted a great deal of attention. In this study different carbon material catalysts(multi-walled carbon nanotubes,carbon fibers and graphite) were developed to enhance the CWAO of phenol in aqueous solution. The functionalized carbon materials exhibited excellent catalytic activity in the CWAO of phenol. After 60 min reaction,the removal of phenol was nearly100% over the functionalized multi-walled carbon,while it was only 14% over the purified multi-walled carbon under the same reaction conditions. Carboxylic acid groups introduced on the surface of the functionalized carbon materials play an important role in the catalytic activity in CWAO. They can promote the production of free radicals,which act as strong oxidants in CWAO. Based on the analysis of the intermediates produced in the CWAO reactions,a new reaction pathway for the CWAO of phenol was proposed in this study. There are some differences between the proposed reaction pathway and that reported in the literature. First,maleic acid is transformed directly into malonic acid. Second,acetic acid is oxidized into an unknown intermediate,which is then oxidized into CO2 and H2O. Finally,formic acid and oxalic acid can mutually interconvert when conditions are favorable. 展开更多
关键词 catalytic wet air oxidation PHENOL Carbon materials RADICAL Reaction pathway
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Use of catalytic wet air oxidation (CWAO) for pretreatment of high-salinity high-organic wastewater 被引量:4
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作者 Wenjing Sun Hongxia Lv +7 位作者 Lei Ma Xiangdong Tan Chengyu Jin Huiling Wu Lili Chen Mengyang Liu Huangzhao Wei Chenglin Sun 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2022年第10期105-114,共10页
Catalytic wet air oxidation(CWAO)coupled desalination technology provides a possibility for the effective and economic degradation of high salinity and high organic wastewater.Chloride widely occurs in natural and was... Catalytic wet air oxidation(CWAO)coupled desalination technology provides a possibility for the effective and economic degradation of high salinity and high organic wastewater.Chloride widely occurs in natural and wastewaters,and its high content jeopardizes the efficacy of Advanced oxidation process(AOPs).Thus,a novel chlorine ion resistant catalyst Bsite Ru doped LaFe_(1-x)Ru_(x)O_(3-)δin CWAO treatment of chlorine ion wastewater was examined.Especially,LaFe_(0.85)Ru_(0.15)O_(3-δ)was 45.5% better than that of the 6%RuO_(2)@TiO_(2)(commercial carrier)on total organic carbon(TOC)removal.Also,doped catalysts LaFe_(1-x)Ru_(x)O_(3-)δshowed better activity than supported catalysts RuO_(2)@LaFeO_(3) and RuO_(2)@TiO_(2) with the same Ru content.Moreover,LaFe_(0.85)Ru_(0.15)O_(3-)δhas novel chlorine ion resistance no matter the concentration of Cl^(−) and no Ru dissolves after the reaction.X-ray diffraction(XRD)refinement,X-ray photoelectron spectroscopy(XPS),transmission electron microscope(TEM),and X-ray absorption fine structure(XAFS)measurements verified the structure of LaFe_(0.85)Ru_(0.15)O_(3-)δ.Kinetic data and density functional theory(DFT)proved that Fe is the site of acetic acid oxidation and adsorption of chloride ions.The existence of Fe in LaFe_(0.85)Ru_(0.15)O_(3-)δcould adsorb chlorine ion(catalytic activity inhibitor),which can protect the Ru site and other active oxygen species to exert catalytic activity.This work is essential for the development of chloride-resistant catalyst in CWAO. 展开更多
关键词 catalytic wet air oxidation Heterogeneous catalysis LaFe_(1-x)Ru_(x)O_(3-)δ Chlorine wastewater Salt resistance mechanism
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Preparation of rare-earth metal complex oxide catalysts for catalytic wet air oxidation 被引量:1
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作者 LI Ning LI Guangming +1 位作者 YAO Zhenya ZHAO Jianfu 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2007年第2期190-195,共6页
Catalytic wet air oxidation(CWAO)is one of the most promising technologies for pollution abatement.Developing catalysts with high activity and stability is crucial for the application of the CWAO process.The Mn/Ce com... Catalytic wet air oxidation(CWAO)is one of the most promising technologies for pollution abatement.Developing catalysts with high activity and stability is crucial for the application of the CWAO process.The Mn/Ce com-plex oxide catalysts for CWAO of high concentration phenol-containing wastewater were prepared by coprecipitation.The catalyst preparation conditions were optimized by using an orthogonal layout method and single-factor experimental analysis.The Mn/Ce serial catalysts were characterized by Brunauer-Emmett-Teller(BET)analysis and the metal cation leaching was measured by inductively coupled plasma torch-atomic emission spectrometry(ICP-AES).The results show that the catalysts have high catalytic activities even at a low temperature(80°C)and low oxygen partial pressure(0.5 MPa)in a batch reactor.The metallic ion leaching is comparatively low(Mn<6.577 mg/L and Ce<0.6910 mg/L,respectively)in the CWAO process.The phenol,COD_(Cr),and TOC removal efficiencies in the solution exceed 98.5%using the optimal catalyst(named CSP).The new catalyst would have a promising application in CWAO treatment of high concentration organic wastewater. 展开更多
关键词 catalytic wet air oxidation(CWAO) complex oxide catalyst rare-earth mental CERIA manganese oxide PHENOL
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Fe203-CeO2-Bi203/y-AI203 catalyst in the catalytic wet air oxidation (CWAO) of cationic red GTL under mild reaction conditions
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作者 Pan Gaol Yuan Song +2 位作者 Shaoning Wang Claude Descorme Shaoxia Yang 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2018年第1期105-112,共8页
The Fe203-CeO2-Bi203/-A1203 catalyst, a novel environmental-friendly material, was used to investigate the catalytic wet air oxidation (CWAO) of cationic red GTL under mild operating conditions in a batch reactor. T... The Fe203-CeO2-Bi203/-A1203 catalyst, a novel environmental-friendly material, was used to investigate the catalytic wet air oxidation (CWAO) of cationic red GTL under mild operating conditions in a batch reactor. The catalyst was prepared by wet impregnation, and characterized by special surface area (BET measurement), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The Fe203-CeO2-]]i203/qt-A1203 catalyst exhibited good catalytic activity and stability in the CWAO under atmosphere pressure. The effect of the reaction conditions (catalyst loading, degradation temperature, solution concentration and initial solution pH value) was studied. The result showed that the decolorization efficiency of cationic red GTL was improved with increasing the initial solution pH value and the degradation temperature. The apparent activation energy for the reaction was 79 kJ. mo1-1. Hydroperoxy radicals (HO2.) and superoxide radicals (O2-) appeared as the main reactive species upon the CWAO of cationic red GTL. 展开更多
关键词 catalytic wet air oxidation (CWAO)Advanced oxidation processes (AOPs)Iron oxide catalystIndustrial wastewater
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Structure, characterization, and dynamic performance of a wet air oxidation catalyst Cu–Fe–La/γ-Al_2O_3 被引量:1
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作者 Yongli Zhang Feng Peng Yanbo Zhou 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第9期1171-1177,共7页
A Cu–Fe–La/γ-Al_2O_3(CFLA) catalyst was prepared by the excessive impregnation method and characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron ... A Cu–Fe–La/γ-Al_2O_3(CFLA) catalyst was prepared by the excessive impregnation method and characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results indicate that the catalyst contained mostly Cu^(2+), Fe^(3+), and La^(3+)and a small amount of Cu^+, Fe^(2+), and La. The active components were uniformly distributed in the catalyst, and the particle size of the components was approximately 7.5 nm. The CFLA catalyst was used for the treatment of methyl orange(MO) solution by catalytic wet air oxidation(CWAO), and it exhibited a high catalytic activity. The catalytic reaction involved variable valence states of metals and free-radical reaction mechanism. The CWAO reaction of MO solution was fitted by a segmented first-order dynamic model, and the rapid reaction apparent activation energy was 13.9 k J·mol^(-1). 展开更多
关键词 catalytic wet air oxidation CATALYST ACTIVITY Reaction mechanism KINETICS Waste water
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Role of Bismuth Oxide in Bi-MCo_2O_4(M=Co,Ni,Cu,Zn) Catalysts for Wet Air Oxidation of Acetic Acid 被引量:1
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作者 JIANGPeng-bo CHENGTie-xin ZHUANGHong CUIXiang-hao BIYing-li ZHENKai-ji 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第3期358-361,共4页
Two series of cobalt(Ⅲ)\|containing spinel catalysts were prepared by the decomposition of the corresponding nitrates. The catalysts doped with bismuth oxide exhibit a higher activity in the wet air oxidation of acet... Two series of cobalt(Ⅲ)\|containing spinel catalysts were prepared by the decomposition of the corresponding nitrates. The catalysts doped with bismuth oxide exhibit a higher activity in the wet air oxidation of acetic acid than those without dopant bismuth oxide. The catalysts were investigated by XRD,TEM,ESR,UV\|DRS and XPS,and the interaction between Co and Bi was studied as well. It has been found that nano\|sized bismuth oxide is paved on the surface of cobalt spinel crystal and the structures of cobalt(Ⅲ)\|containing spinel are still maintained. The shift of the binding energy of Bi\-\{\%4f\%\-\{7/2\}\} is related to the catalytic activity of these catalysts doped with bismuth oxide. 展开更多
关键词 Cobalt(Ⅲ)-containing spinel Bismuth oxide catalytic wet air oxidation Acetic acid
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Wet Air Oxidation of Organic Wastewater Catalyzed by Doped Ceria
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作者 应跃芳 王月娟 +1 位作者 何军 罗孟飞 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第S1期249-252,共4页
The catalytic wet air oxidation (CWAO) of H acid and phenol was investigated in the presence of Cu or Fe doped CeOsolid solutions, which were obtained by sol-gel method. The experiment results showed that the incorpor... The catalytic wet air oxidation (CWAO) of H acid and phenol was investigated in the presence of Cu or Fe doped CeOsolid solutions, which were obtained by sol-gel method. The experiment results showed that the incorporation of Cu or Fe into the fluorite lattice of CeOstrongly enhanced the oxidation activity of the catalyst. At 90 ℃ and 0.1 MPa, H acid conversion was 70% for the Ce0.9Fe0.1O2-δ and 60% for the Ce0.9Cu0.1O2-δ catalyst. For phenol removal, the conversion was 70% for the Ce0.9Cu0.1O2-δ catalyst, while for the Ce0.9Fe0.1O2-δ the conversion was 30%. The results indicated that Ce0.9Cu0.1O2-δ was suitable for the treatment of organic wastewaters while Ce0.9Fe0.1O2-δ was suitable for the removal of H acid. The 70% phenol removal rate with Ce0.9Cu0.1O2-δ catalyst was markedly increased to 90% with Ce0.8Cu0.2O2-δ catalyst. However, the phenol removal reduced from 30% to 15% with Fe content increasing from 10% to 20%. For the H acid, the increase of the content of Cu or Fe tended to obviously increase the original reaction rate while the COD removal changed little. 展开更多
关键词 H acid PHENOL COD removal rate catalytic wet air oxidation rare earths
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Fe salts as catalyst for the wet oxidation of o-chlorophenol 被引量:2
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作者 徐新华 何平 +1 位作者 金剑 郝志伟 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE EI CAS CSCD 2005年第6期569-573,共5页
Catalytic wet air oxidation (CWAO) of o-chlorophenol in wastewater was studied in a stainless steel autoclave using four different Fe catalysts in the temperature range of 100?200 °C. Experimental results showed ... Catalytic wet air oxidation (CWAO) of o-chlorophenol in wastewater was studied in a stainless steel autoclave using four different Fe catalysts in the temperature range of 100?200 °C. Experimental results showed that high rate of o-chlorophenol and CODCr (Chemical Oxygen Demand, mg/L) removal by CWAO was obtained at relatively low temperature and pressure. The catalysts Fe2(SO4)3, FeSO4, Fe2O3 and FeCl3 all exhibited high catalytic activity. More than 93.7% of the initial CODCr and nearly 100% of o-chlorophenol were removed at 150 °C after 150 min with FeSO4 as catalyst. The CWAO of o-chlorophenol was found to be pseudo-first order reaction with respect to o-chlorophenol, with activation energy of 75.56 kJ/mol in the temperature range of 100-175 °C. 展开更多
关键词 FE O-CHLOROPHENOL catalytic wet air oxidation KINETIC
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Selective oxidation of methylamine over zirconia supported Pt-Ru, Pt and Ru catalysts 被引量:7
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作者 宋爱英 吕功煊 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第7期1206-1213,共8页
Pt-Ru, Pt and Ru catalysts supported on zirconia were prepared by impregnation method and were tested in selective oxidation of methylamine (MA) in aqueous media. Among three catalysts, Ru/ZrO2 was more active than ... Pt-Ru, Pt and Ru catalysts supported on zirconia were prepared by impregnation method and were tested in selective oxidation of methylamine (MA) in aqueous media. Among three catalysts, Ru/ZrO2 was more active than Pt/ZrO2 while Pt-Ru/ZrO2 demonstrated the best catalytic activity due to the fact that Pt addition efficiently promoted the dispersion of active species in bimetallic catalyst. Therefore, the - 100% TOC conversion and N2 selectivity were achieved over Pt-Ru/ZrO2, Pt/ZrO2 and Ru/ZrO2 catalysts at 190, 220 and 250 ℃, respectively. 展开更多
关键词 Platinum-Ruthenium DispersionHysteresis Zirconia Methylarnine catalytic wet air oxidation
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Fabrication of nanoreactors based on polyoxoperoxometalates and enhancement of their catalytic activity 被引量:1
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作者 Mei Jie Wei Chun Li Zhang Cong Liang Sun Ang Li Xiao Hong Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2011年第7期875-878,共4页
The nanoreactors were fabricated by reacting amphiphilic quaternary ammoniums and polyoxoperoxometalates Kn[PW12-xTix. O40-x(O2)x] (x = 1, 2 and 3; n =5, 7 and 9) (K5[PW11TiO39(O2)], KT[PWloTi2038(O2)2] and K... The nanoreactors were fabricated by reacting amphiphilic quaternary ammoniums and polyoxoperoxometalates Kn[PW12-xTix. O40-x(O2)x] (x = 1, 2 and 3; n =5, 7 and 9) (K5[PW11TiO39(O2)], KT[PWloTi2038(O2)2] and K9[PW9Ti3O37(O2)3]). Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) were used to characterize the resulting samples. This kind of nanocatalysts could promote NH4SCN' degradation into simple inorganic compounds such as SO4^2-, HCO3^- and NO3^- only using oxygen as an oxidant under room conditions. 展开更多
关键词 catalytic wet air oxidation THIOCYANATE POLYOXOMETALATE NANOCATALYSTS
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