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Genome-Wide Identification of ABCC Gene Subfamily Members and Functional Analysis of CsABCC11 in Camellia sinensis
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作者 Mingyuan Luo Shiyu Tian +7 位作者 Xinzhuan Yao Yue Wan Zhouzhuoer Chen Zifan Yang Huagen Hao Fei Liu Hu Tang Litang Lu 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第8期2019-2036,共18页
The ATP-binding cassette(ABC)transporter is a gene superfamily in plants.ATP-binding cassette subfamily C(ABCC)protein is a multidrug resistance-associated(MRP)transporter.They play various roles in plant growth,devel... The ATP-binding cassette(ABC)transporter is a gene superfamily in plants.ATP-binding cassette subfamily C(ABCC)protein is a multidrug resistance-associated(MRP)transporter.They play various roles in plant growth,development,and secondary metabolite transport.However,there are few studies on ABCC transporters in tea plants.In this study,genome-wide association study(GWAS)analysis of epigallocatechin gallate(EGCG)content in 108 strains of Kingbird revealed that CsABCCs may be involved in EGCG transport.We identified 25 CsABCC genes at the genomic level of the tea plant,their phylogenetic tree,gene structure,targeted miRNA and other bioinformatics were analyzed.The expression patterns of CsABCCs in eight different tissues and abiotic stress indicate that they have potential roles in regulating the growth,development,and defense of tea plants.The correlation analysis revealed that the expression of the CsABCC11 gene was closely related to the EGCG content in tea buds of 108 strains of the Kingbird,and the subcellular localization experiments in tobacco showed that CsABCC11 protein was localized on the plasma membrane.The virus-induced gene silencing(VIGS)strategy in tea plants further verified that CsABCC11 was involved in EGCG accumulation.Our study laid a foundation for studying the biological function of CsABCC and provided a new candidate molecular marker gene for further EGCG-related variety breeding,which will be of great interest to breeders. 展开更多
关键词 Camellia sinensis ABCC gene subfamily EGCG VIGS guizhou local variety Kingbird
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CO_(2) capture RD&D proceedings in China Huaneng Group 被引量:4
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作者 Jinyi Wang Shisen Xu 《International Journal of Coal Science & Technology》 EI CAS 2014年第1期129-134,共6页
CO_(2) capture is an important carbon management route to mitigate the greenhouse gas emission in power sector.In recent years,China Huaneng Group(CHNG)has paid more attention on CO_(2)capture technology development a... CO_(2) capture is an important carbon management route to mitigate the greenhouse gas emission in power sector.In recent years,China Huaneng Group(CHNG)has paid more attention on CO_(2)capture technology development and launched a series of R&D and demonstration projects.In the area of pre-combustion CO_(2) capture technology,GreenGen project initiated by CHNG is the first integrated gasification combined cycle(IGCC)power plant in China.Located in Tianjin,GreenGen aims at the development,demonstration and promotion of a near-zero emissions power plant.An IGCC plant of 250 MW has successfully passed full-scale trial operation.In the next phase,a pre-combustion CO_(2) capture unit will be integrated into the system.Pre-combustion process based on coal chemical process has been developed with lower costs successfully.Regarding to post-combustion CO_(2) capture(PCC),in 2008,CHNG built a 3,000 tpa CO_(2) capture plant,which was the first CO_(2) capture demonstration plant in China.In 2009,CHNG launched a PCC project in Shanghai with a capture capacity of 120,000 tpa CO_(2).Recently,Huaneng Clean Energy Research Institute(CERI)and Powerspan formed a joint venture,Huaneng-CERI-Powerspan(HCP).HCP has completed the technology qualification program to supply carbon capture technology for the CO_(2)capture Mongstad project.Besides these activities mentioned above,feasibility studies and system design for large scale PCC system,have been undertaken by CERI and its partners from Australia,US and Europe. 展开更多
关键词 CO_(2)capture Post-combustion Pre-combustion IGCC GreenGen
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Development of new technology for coal gasification purification and research on the formation mechanism of pollutants 被引量:2
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作者 Shu Zheng Yixiang Shi +3 位作者 Zhiqi Wang Pengjie Wang Gang Liu Huaichun Zhou 《International Journal of Coal Science & Technology》 EI CAS CSCD 2021年第3期335-348,共14页
Coal-fired power generation is the main source of CO_(2)emission in China.To solve the problems of declined efficiency and increased costs caused by CO_(2)capture in coal-fired power systems,an integrated gasification... Coal-fired power generation is the main source of CO_(2)emission in China.To solve the problems of declined efficiency and increased costs caused by CO_(2)capture in coal-fired power systems,an integrated gasification fuel cell(IGFC)power generation technology was developed.The interaction mechanisms among coal gasification and purification,fuel cell and other components were further studied for IGFCs.Towards the direction of coal gasification and purification,we studied gasification reaction characteristics of ultrafine coal particles,ash melting characteristics and their effects on coal gasification reactions,the formation mechanism of pollutants.We further develop an elevated temperature/pressure swing adsorption rig for simultaneous H_(2)S and CO_(2)removals.The results show the validity of the Miura-Maki model to describe the gasification of Shenhua bituminous coal with a good fit between the predicted DTG curves and experimental data.The designed 8–6–1 cycle procedure can effectively remove CO_(2)and H_(2)S simultaneously with removal rate over 99.9%.In addition,transition metal oxides used as mercury removal adsorbents in coal gasified syngas were shown with great potential.The techniques presented in this paper can improve the gasification efficiency and reduce the formation of pollutants in IGFCs. 展开更多
关键词 IGFC Coal gasification H_(2)S-CO_(2)removal Syngas mercury removal
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Fracture prediction in the tight-oil reservoirs of the Triassic Yanchang Formation in the Ordos Basin,northern China 被引量:8
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作者 Wen-Tao Zhao Gui-Ting Hou 《Petroleum Science》 SCIE CAS CSCD 2017年第1期1-23,共23页
It is important to predict the fracture distribution in the tight reservoirs of the Ordos Basin because fracturing is very crucial for the reconstruction of the low-permeability reservoirs. Three-dimensional finite el... It is important to predict the fracture distribution in the tight reservoirs of the Ordos Basin because fracturing is very crucial for the reconstruction of the low-permeability reservoirs. Three-dimensional finite element models are used to predict the fracture orientation and distribution of the Triassic Yanchang Formation in the Longdong area, southern Ordos Basin. The numerical modeling is based on the distribution of sand bodies in the Chang 7a and 72 members, and the different forces that have been exerted along each boundary of the basin in the Late Mesozoic and the Cenozoic. The calculated results demonstrate that the fracture orientations in the Late Mesozoic and the Ceno- zoic are NW-EW and NNE-ENE, respectively. In this paper, the two-factor method is applied to analyze the distribution of fracture density. The distribution maps of predicted fracture density in the Chang 71 and 72 members are obtained, indicating that the tectonic movement in the Late Mesozoic has a greater influence on the fracture development than that in the Cenozoic. The average fracture densities in the Chang 71 and 72 members are similar, but there are differences in their distributions. Compared with other geological elements, the lithology and the layer thickness are the primary factors that control the stress distribution in the study area, which further determine the fracture distribution in the stable Ordos Basin. The predicted fracture density and the two-factor method can be utilized to guide future exploration in the tight-sand reservoirs. 展开更多
关键词 Ordos Basin - Yanchang Formation Fractureprediction Finite element modeling Two-factor methodTight-sand reservoirs
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Study and performance test of 10 kW molten carbonate fuel cell power generation system 被引量:1
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作者 Chengzhuang Lu Ruiyun Zhang +3 位作者 Guanjun Yang Hua Huang Jian Cheng Shisen Xu 《International Journal of Coal Science & Technology》 EI CAS CSCD 2021年第3期368-376,共9页
The use of high-temperature fuel cells as a power technology can improve the efficiency of electricity generation and achieve near-zero emissions of carbon dioxide.This work explores the performance of a 10 kW high-te... The use of high-temperature fuel cells as a power technology can improve the efficiency of electricity generation and achieve near-zero emissions of carbon dioxide.This work explores the performance of a 10 kW high-temperature molten carbonate fuel cell.The key materials of a single cell were characterized and analyzed using X-ray diffraction and scanning electron microscopy.The results show that the pore size of the key electrode material is 6.5 lm and the matrix material is a-LiAlO_(2).Experimentally,the open circuit voltage of the single cell was found to be 1.23 V.The current density was greater than 100 mA/cm^(2)at an operating voltage of 0.7 V.The 10 kW fuel cell stack comprised 80 single fuel cells with a total area of 2000 cm^(2)and achieved an open circuit voltage of greater than 85 V.The fuel cell stack power and current density could reach 11.7 kW and 104.5 mA/cm2 at an operating voltage of 56 V.The influence and long-term stable operation of the stack were also analyzed and discussed.The successful operation of a 10 kW high-temperature fuel cell promotes the large-scale use of fuel cells and provides a research basis for future investigations of fuel cell capacity enhancement and distributed generation in China. 展开更多
关键词 Fuel cell stack Key materials Molten carbonate fuel cell Power generation test
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Reactivity and Mechanism Study of CO2 With Amino Acids as Carbon Capture Solvents
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作者 GUO Dongfang WANG Jinyi +1 位作者 Gabriel da Silva GAO Shiwang 《中国电机工程学报》 EI CSCD 北大核心 2013年第32期I0005-I0005,共1页
关键词 二氧化碳脱除 溶剂体系 氨基酸 CCS系统 机理 反应 捕集 温室气体
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Extended application of carbon sorbent traps method in mercury concentration measurement in coal-fired power plants
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作者 ZHONG Li XIAO Ping JIANG Jianzhong GUO Tao GUO An 《热力发电》 CAS 北大核心 2014年第6期23-31,共9页
关键词 碳吸附剂 循环流化床 电力行业 湿法烟气脱硫
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An Experimental Study on Oxidized Mercury Adsorption by Bromide Blended Coal Combustion Fly Ash
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作者 Mingyu Yu Mengyuan Liu +7 位作者 Guangqian Luo Ruize Sun Jingyuan Hu Hailu Zhu Li Zhong Lipeng Han Xian Li Hong Yao 《Energy Engineering》 EI 2021年第5期1277-1286,共10页
The application of forced mercury oxidation technology would lead to an increase of Hg^(2+)concentration in the flue gas.Although Hg^(2+)can be easily removed in the WFGD,the mercury re-emission in the WFGD can decrea... The application of forced mercury oxidation technology would lead to an increase of Hg^(2+)concentration in the flue gas.Although Hg^(2+)can be easily removed in the WFGD,the mercury re-emission in the WFGD can decrease the total removal of mercury from coal-fired power plants.Hence,it is necessary to control Hg^(2+)concentration in the devices before the WFGD.Fly ash adsorbent is considered as a potential alternative for commercial activated carbon adsorbent.However,the adsorption efficiency of the original fly ash is low.Modification procedure is needed to enhance the adsorption performance.In this study,the adsorption of Hg^(2+)by brominated fly ash was studied.The fly ash was collected from the full-scale power plant utilizing bromide-blended coal combustion technology.The brominated fly ash exhibited excellent performance for Hg^(2+)removal.The flue gas component HBr and SO_(2)could improve adsorbent’s performance,while HCl would hinder its adsorption process.Also,it was demonstrated by Hg-TPD experiments that the adsorbed Hg^(2+)mainly existed on the fly ash surface in the form of HgBr_(2).In summary,the brominated fly ash has a broad application prospect for mercury control. 展开更多
关键词 MERCURY fly ash BROMIDE adsorbents flue gas
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Quantitative Analysis on Shale Oil Accumulations Conditions for 4th Member of Shahejie Formation in Liaohe Western Depression
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作者 JING Tieya HUANG Xiao +2 位作者 SUN Rui MAO Junli ZHANG Jian 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2015年第A01期158-161,共4页
The 4th member of Shahejie Formation in Liaohe Westem Depression had experienced rapid subsidence, which resulted into massive shale with the characteristics of high organic matter abundance and sapropelic kerogen. Mo... The 4th member of Shahejie Formation in Liaohe Westem Depression had experienced rapid subsidence, which resulted into massive shale with the characteristics of high organic matter abundance and sapropelic kerogen. Most shale samples have the total organic carbon (TOC) over 2%, and the value can excess 4% for dolomitic shale in Leijia area. 展开更多
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刚柔并济的仿生凝胶聚合物电解质助力稳定的锂电池
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作者 周天易 徐若晨 +8 位作者 曹曦 张江涛 王佳运 黄茹玲 平小凡 白盼星 孙周婷 刘明义 王晓龙 《Science China Materials》 SCIE EI CAS CSCD 2024年第7期2256-2265,共10页
凝胶聚合物电解质(GPE)因其优良的热稳定性和卓越的电化学性能而具备增强锂离子电池性能的潜力,从而受到越来越多的认可.尽管其具有上述优点,但传统GPE的实际应用通常因其溶胀性和有限的机械强度而受到阻碍.为了解决这些问题,本项研究... 凝胶聚合物电解质(GPE)因其优良的热稳定性和卓越的电化学性能而具备增强锂离子电池性能的潜力,从而受到越来越多的认可.尽管其具有上述优点,但传统GPE的实际应用通常因其溶胀性和有限的机械强度而受到阻碍.为了解决这些问题,本项研究工作提出了一种通过简单方法构建的刚柔并济的仿生GPE,由聚环氧乙烷(PEO)和聚偏二氟乙烯-六氟丙烯(PVDF-HFP)组成并通过Kevlar纤维织物进行增强.所得的PEO/PVDF-HFP/Kevlar(PPK)GPE表现出2.815 mS cm^(−1)的优异离子电导率和0.571的锂离子迁移数,以及32.59 MPa的超高机械强度.这些特性有助于防止锂枝晶生长并增强LiFePO4电池的电化学性能,从而实现稳定的循环性能.PPK GPE可以为高性能锂离子电池的各种实际应用提供理论基础. 展开更多
关键词 gel polymer electrolyte polyethylene oxide(PEO) poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP) Kevlar fiber cartilage structure
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Recent progress on electro-sorption technology for lithium recovery from aqueous sources
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作者 Qichen Lu Peng Liu +7 位作者 Tianyi Zhou Ruling Huang Kexin Zhang Lin Hu Rong Liu Zhibo Ren Jinyi Wang Xiaolong Wang 《Nano Research》 SCIE EI CSCD 2024年第4期2563-2573,共11页
Lithium is known as the“white petroleum”of the electrification era,and the global demand for lithium grows rapidly with the quick development of new energy industry.The aqueous solutions,such as salt lake brine,unde... Lithium is known as the“white petroleum”of the electrification era,and the global demand for lithium grows rapidly with the quick development of new energy industry.The aqueous solutions,such as salt lake brine,underground brine,and seawater,have large lithium reserves,thus this kind of lithium resource has become a research hotspot recently.Compared with other lithium extraction technologies,electro-sorption method shows good prospects for practical applications with advantages in the aspects of efficiency,recovery ratio,cost,and environment.Herein,this review covers recent progress on electro-sorption technology for lithium recovery from aqueous solutions,including the concept illustration,research progress of the applied working electrodes and counter electrodes,and the evaluation indicators of electro-sorption system.Meanwhile,some prospects for the development of this technology are also proposed.We hope this review is beneficial for the construction of high-efficient electrochemical lithium recovery system to achieve an adequate lithium supply in the future. 展开更多
关键词 lithium extraction electro-sorption technology lithium selective electrode counter electrode system evaluation method
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PVDF-HFP-SN-based gel polymer electrolyte for high-performance lithium-ion batteries 被引量:2
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作者 Ruling Huang Ruochen Xu +4 位作者 Jiangtao Zhang Jiayun Wang Tianyi Zhou Mingyi Liu Xiaolong Wang 《Nano Research》 SCIE EI CSCD 2023年第7期9480-9487,共8页
Gel polymer electrolytes(GPEs)have attracted extensive attention in lithium-ion batteries due to their high security and excellent electrochemical performance.However,their inferior Li-ion transference number,low room... Gel polymer electrolytes(GPEs)have attracted extensive attention in lithium-ion batteries due to their high security and excellent electrochemical performance.However,their inferior Li-ion transference number,low room-temperature ionic conductivity,and poor long cycle stability raise challenges in practical applications.Herein,a flexible poly(vinylidene fluoride-cohexafluoropropylene)-butanedinitrile(PVDF-HFP-SN)-based GPE(PSGPE)is synthesized successfully by a general immersion precipitation method.The resultant PSGPEs have numerous connecting pores to ensure sufficient space for liquid electrolytes.Moreover,the reduced crystallinity of PVDF-HFP and the high polarity of SN can reduce the energy barrier of Li-ions shuttling between pores.The synergistic effect possesses a high ionic conductivity of 1.35 mS·cm^(-1)at room temperature with a high Li-ion transference number of 0.69.The PVDF-HFP-SN-based GPE is applied in a LiFePO_(4)/graphite battery,which can realize stable cycling performance for 350 cycles and good rate performance at room temperature.These results demonstrate that the novel PSGPE possesses advantage in simplified production process,which can improve the practicability of gel polymer lithium-ion batteries. 展开更多
关键词 poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)-based butanedinitrile(SN) gel polymer electrolyte synergistic effect
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Silvaco TCAD模拟应用三层氢化纳晶硅薄膜改善IBC-SHJ太阳电池的电学性能并扩大其工艺窗口
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作者 姜铠 张洪华 +9 位作者 张丽平 孟凡英 高彦峰 虞祥瑞 赵东明 李睿 黄海威 郝志丹 刘正新 刘文柱 《Science China Materials》 SCIE EI CAS CSCD 2023年第12期4891-4896,共6页
叉指式背接触硅异质结(IBC-SHJ)太阳电池由于其优异的光学性能备受关注,但是较低的填充因子(FF)限制了其转换效率.本文中,我们用Silvaco TCAD软件模拟了IBC-SHJ太阳电池,发现p-n结和高低结收集载流子的能力有很大差异.高低结内建电场较... 叉指式背接触硅异质结(IBC-SHJ)太阳电池由于其优异的光学性能备受关注,但是较低的填充因子(FF)限制了其转换效率.本文中,我们用Silvaco TCAD软件模拟了IBC-SHJ太阳电池,发现p-n结和高低结收集载流子的能力有很大差异.高低结内建电场较弱,难以收集电子是FF较低的主要原因.因此,我们用氢化纳晶硅(nc-Si:H)薄膜来代替氢化非晶硅(a-Si:H)薄膜,并且在nc-Si:H薄膜表面覆盖一层超薄高掺杂层进一步提高了载流子传输效率,获得了高达85.3%的FF.此外,三层nc-Si:H薄膜还提高了工艺生产中对掺杂层厚度的容错性,这大大扩展了IBCSHJ太阳电池的工艺窗口.这项工作为解决IBC-SHJ太阳电池的电学问题提供了一条有效的途径,对工艺生产中IBC-SHJ太阳电池的设计具有指导意义. 展开更多
关键词 太阳电池 填充因子 转换效率 氢化非晶硅 载流子传输 工艺窗口 硅薄膜 电学性能
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Unsteady aerodynamic characteristics of a horizontal wind turbine under yaw and dynamic yawing 被引量:11
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作者 Zhaoliang Ye Xiaodong Wang +1 位作者 Ziwen Chen Luyao Wang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2020年第2期320-338,共19页
Horizontal axis wind turbine(HAWT)often works under yaw due to the stochastic variation of wind direction.Yaw also can be used as one of control methods for load reduction and wake redirection of HAWT.Thus,the aerodyn... Horizontal axis wind turbine(HAWT)often works under yaw due to the stochastic variation of wind direction.Yaw also can be used as one of control methods for load reduction and wake redirection of HAWT.Thus,the aerodynamic performance under yaw is very important to the design of HAWT.For further insight into the highly unsteady characteristics aerodynamics of HAWT under yaw,this paper investigates the unsteady variations of the aerodynamic performance of a small wind turbine under static yawed and yawing process with sliding grid method,as well as the there-dimensional effect on the unsteady characteristics,using unsteady Reynolds-averaged Navier-Stokes(URANS)simulations.The simulation results are validated with experimental data and blade element momentum(BEM)results.The comparisons show that the CFD results have better agreement with the experimental data than both BEM results.The wind turbine power decreases according to a cosine law with the increase of yaw angle.The torque under yaw shows lower frequency fluctuations than the non-yawed condition due to velocity component of rotation and the influence of spinner.Dynamic yawing causes larger fluctuate than static yaw,and the reason is analyzed.The aerodynamic fluctuation becomes more prominent in the retreating side than that in the advancing side for dynamic yawing case.Variations of effective angle of attack and aerodynamic forces along the blade span are analyzed.The biggest loading position moves from middle span to outer span with the increase of yaw angle.Three-dimensional stall effect presents load fluctuations at the inner board of blade,and becomes stronger with the increase of yaw angle. 展开更多
关键词 Wind turbine Three-dimensional stall effect Numerical simulation Dynamic yawing
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Development of integrated two-stage thermoelectric generators for large temperature difference 被引量:6
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作者 PEI Jun LI LiangLiang +3 位作者 LIU DaWei ZHANG BoPing XIAO Yu LI JingFeng 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2019年第9期1596-1604,共9页
Multi-stage thermoelectric(TE) modules can withstand a large temperature difference and can be used to obtain a high conversion efficiency. In this study, two-stage PbTe/Bi2Te3 TE modules were developed with an enhanc... Multi-stage thermoelectric(TE) modules can withstand a large temperature difference and can be used to obtain a high conversion efficiency. In this study, two-stage PbTe/Bi2Te3 TE modules were developed with an enhanced efficiency through a comprehensive study of device structure design, module fabrication, and performance evaluation. PbTe-based AgPbmSbTem+2(abbreviated as LAST) is a typically high ZT material, while the corresponding TE module was rarely reported so far. How to utilize LAST to fabricate high efficiency TE modules therefore remains a central problem. Finite element simulation indicates that the temperature stability of the two-stage module for LAST is better than that of two-segmented module. Compared to Cu,Ni, and Ni-Fe alloys, Co-Fe alloy is an effective metallization layer for PbTe due to its low contact resistance and thin diffusion layer. By sintering a slice of Cu on TE legs, pure tinfoil can be used as a common welding method for mid-temperature TE modules. A maximum efficiency(ηmax) of 9.5% was achieved in the range of 303 to 923 K in an optimized PbTe/Bi2Te3 based two-stage module, which was almost twice that of a commercial TE module. 展开更多
关键词 PBTE THERMOELECTRIC TWO-STAGE module FINITE ELEMENT method CONVERSION efficiency
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Flexible Operation Mode of Coal-fired Power Unit Coupling with Heat Storage of Extracted Reheat Steam 被引量:4
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作者 WEI Haijiao LU Yuanwei +4 位作者 YANG Yanchun ZHANG Cancan WU Yuting LI Weidong ZHAO Dongming 《Journal of Thermal Science》 SCIE EI CAS CSCD 2022年第2期436-447,共12页
In order to provide more grid space for the renewable energy power,the traditional coal-fired power unit should be operated flexibility,especially achieved the deep peak shaving capacity.In this paper,a new scheme usi... In order to provide more grid space for the renewable energy power,the traditional coal-fired power unit should be operated flexibility,especially achieved the deep peak shaving capacity.In this paper,a new scheme using the reheat steam extraction is proposed to further reduce the load far below 50%rated power.Two flexible operation modes of increasing power output mode and reducing fuel mode are proposed in heat discharging process.A 600 MW coal-fired power unit with 50%rated power is chosen as the research model.The results show that the power output is decreased from 300.03 MW to 210.07 MW when the extracted reheat steam flow rate is 270.70 t·h^(-1),which increases the deep peak shaving capacity by 15%rated power.The deep peak shaving time and the thermal efficiency are 7.63 h·d^(-1)and 36.91%respectively for the increasing power output mode,and they are 7.24 h·d^(-1)and 36.58%respectively for the reducing fuel mode.The increasing power output mode has the advantages of higher deep peak shaving time and the thermal efficiency,which is recommended as the preferred scheme for the flexible operation of the coal-fired power unit. 展开更多
关键词 coal-fired power unit flexible operation deep peak shaving extracted reheat steam heat storage
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Elemental mercury (Hg^(0)) removal from coal syngas using magnetic tea-biochar: Experimental and theoretical insights 被引量:2
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作者 Adnan Raza Altaf Yusuf GAdewuyi +2 位作者 Haipeng Teng Gang Liu Fazeel Abid 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2022年第12期150-161,共12页
Mercury is ranked 3^(rd)as a global pollutant because of its long persistence in the environment. Approximately 65% of its anthropogenic emission (Hg^(0)) to the atmosphere is from coal-thermal power plants. Thus, the... Mercury is ranked 3^(rd)as a global pollutant because of its long persistence in the environment. Approximately 65% of its anthropogenic emission (Hg^(0)) to the atmosphere is from coal-thermal power plants. Thus, the Hg^(0)emission control from coal-thermal power plants is inevitable. Therefore, multiple sorbent materials were synthesized using a one-step pyrolysis method to capture the Hg^(0)from simulated coal syngas. Results showed, the Hg^(0)removal performance of the sorbents increased by the citric acid/ultrasonic application.T5CUF_(0.3)demonstrated the highest Hg^(0)capturing performance with an adsorption capacity of 106.81 μg/g within 60 min at 200 °C under complex simulated syngas mixture (20% CO,20% H_(2), 10 ppm V HCl, 6% H_(2)O, and 400 ppm V H_(2)S). The Hg^(0)removal mechanism was proposed, revealing that the chemisorption governs the Hg^(0)removal process. Besides, the active Hg^(0)removal performance is attributed to the high dispersion of valence Fe_(3)O_(4)and lattice oxygen (α) contents over the T5CUF_(0.3)surface. In addition, the temperature programmed desorption (TPD) and XPS analysis confirmed that H_(2)S/HCl gases generate active sites over the sorbent surface, facilitating high Hg^(0)adsorption from syngas. This work represented a facile and practical pathway for utilizing cheap and eco-friendly tea waste to control the Hg^(0)emission. 展开更多
关键词 Mercury removal Waste management Citric acid Ultrasound Coal gasification TPD analysis
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Adsorption behaviour of molecular sieve and activated carbon for CO_(2) adsorption at cold temperatures
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作者 Shiqing Wang Yutong Wang +6 位作者 Yue Kuang Shisen Xu Shiwang Gao Lianbo Liu Hongwei Niu Ping Xiao Bing Huang 《Carbon Neutrality》 2022年第1期419-427,共9页
At present,insufficient works have provided insights into the application of adsorption to remove CO_(2) in flue gas below room temperatures under ambient pressure.In this work,the effects of temperature,CO_(2) partia... At present,insufficient works have provided insights into the application of adsorption to remove CO_(2) in flue gas below room temperatures under ambient pressure.In this work,the effects of temperature,CO_(2) partial pressure and moisture on dynamic adsorption characteristics for CO_(2) are conducted for various adsorbents.Based on our findings,lower the adsorbing temperature can drastically enhance the adsorption of carbon dioxide over molecular sieves and activated carbon.Among various adsorbents,13X molecular sieve shows highest adsorption capacity.With a concentration of 10%CO_(2) in flue gas,the specific adsorption capacity of CO_(2) over 13X molecular sieve is 0.11,2.54 and 5.38 mmol/g at 80℃,0℃ and -80℃,respectively.In addition,the partial pressure of CO_(2) also has a significant impact on the adsorption capacity.With the increment of the concentration of CO_(2) from 1%to 10% under 0℃,the specific capacity of 13X molecular sieve increases from 1.212 mmol/g to 2.538 mmol/g.Water vapor in flue gas can not only reduce the specific adsorption capacity of CO_(2) due to competing adsorption,but also increase the heat penalty of molecular sieve regeneration due to the water adsorption.An overall analysis is conducted on the energy penalty of capture 1 ton CO_(2) at various adsorption temperatures between -80℃ and 80℃,considering both the heat penalty of molecular sieve regeneration as well as the energy penalty for cooling the adsorber.It is found that the lowest energy penalty is about 2.01 GJ/ton CO_(2) when the adsorption is conducted at 0℃. 展开更多
关键词 Low temperature CO_(2)adsorption Molecular sieve Activated carbon Energy consumption
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Carbon Nanofibers Encapsulated CoNiFe Bifunctional Electrocatalysts for Durable Zn-Air Batteries at Room and -40℃ Ultralow Temperatures
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作者 Mingyan Zhang Yudong Gong +6 位作者 Yan Liu Yake Liu Shiqing Huang Ziqiang Niu Xueting Zhang Xiuling Zhang Dapeng Cao 《Renewables》 2024年第5期353-363,共11页
Reasonably designing composition and nanostructure to enhance the stability of bifunctional catalysts is highly desired for rechargeable Zn-air batteries(ZABs).Here,porous carbon nanofibers(CNFs)encapsulated CoNiFe al... Reasonably designing composition and nanostructure to enhance the stability of bifunctional catalysts is highly desired for rechargeable Zn-air batteries(ZABs).Here,porous carbon nanofibers(CNFs)encapsulated CoNiFe alloy nanoparticles(NPs)(CoNiFe/CNFs)were synthesized controllably by in-situ growth and cation etching.Electrochemical tests indicated that CoNiFe/CNFs exhibited excellent bifunctional performances in both oxygen evolution reaction(OER)and oxygen reduction reaction(ORR).Using CoNiFe/CNFs as bifunctional catalysts,the assembled ZABs presented ultralong durability up to 1050 and 660 h at 5 and 25 mA cm^(-2),respectively.The assembled flexible solid-state ZABs-based polyacrylamide(PAM)hydrogel exhibited a power density of 62.9 mW cm^(-2) and 66 h durability at 2 mA cm^(-2) under ultralow temperature of -40℃.The excellent performance of CoNiFe/CNFs was ascribed to the encapsulation of CNFs by the alloy NPs and the synergy of multi-metals in the alloy NPs,because the encapsulation could suppress alloy spillage and agglomeration and protect the catalytic sites from electrolyte deterioration,thereby boosting the durability of the resulting ZABs. 展开更多
关键词 rechargeable Zn-air battery bifunctional catalyst CoNiFe alloy encapsulation effect long-term stability -40℃ultralow temperature
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