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Self-supported copper-based gas diffusion electrodes improve the local CO_(2)concentration for efficient electrochemical CO_(2)reduction

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 51-62页

作者： Azeem Mustafa bachirou guene lougou Yong Shuai Zhijiang Wang Haseeb-ur-Rehman Samia Razzaq Wei Wang Ruming Pan Jiupeng Zhao Key Laboratory of Aerospace Thermophysics of MIIT Harbin Institute of TechnologyHarbin150001China School of Energy Science and Engineering Harbin Institute of TechnologyHarbin150001China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin150001China Mechanical Engineering Department University of Engineering and TechnologyTaxila47050Pakistan School of Aerospace Mechanical and Mechatronics EngineeringUniversity of SydneySydney2006Australia

Electrochemical CO_(2)reduction is a sustainable approach in green chemistry that enables the production of valuable chemicals and fuels while mitigating the environmental impact associated with CO_(2)*** its several advantages,this technology suffers from an intrinsically low CO_(2)solubility in aqueous solutions,resulting in a lower local CO_(2)concentration near the electrode,which yields lower current densities and restricts product *** diffusion electrodes(GDEs),particularly those with tubular architectures,can solve these issues by increasing the local CO_(2)concentration and triple-phase interface,providing abundant electroactive sites to achieve superior reaction *** this study,robust and self-supported Cu flow-through gas diffusion electrodes(FTGDEs)were synthesized for efficient formate production via electrochemical CO_(2)*** were further compared with traditional Cu electrodes,and it was found that higher local CO_(2)concentration due to improved mass transfer,the abundant surface area available for the generation of the triple-phase interface,and the porous structure of Cu FTGDEs enabled high formate Faradaic efficiency(76%)and current density(265 mA¸cm^(−2))at–0.9 V *** hydrogen electrode(RHE)in 0.5 mol·L^(−1)*** combined phase inversion and calcination process of the Cu FTGDEs helped maintain a stable operation for several *** catalytic performance of the Cu FTGDEs was further investigated in a non-gas diffusion configuration to demonstrate the impact of local gas concentration on the activity and performance of electrochemical CO_(2)*** study demonstrates the potential of flow-through gas-diffusion electrodes to enhance reaction kinetics for the highly efficient and selective reduction of CO_(2),offering promising applications in sustainable electrochemical processes.

关键词： CO_(2)electroreduction flow-through delivery hollow fiber structure local concentration formate

Solar-driven photothermal catalytic CO2 conversion:a review

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Rare Metals 2024年第7期43卷 2913-2939页

作者： bachirou guene lougou Bo-Xi Geng Ru-Ming Pan Wei Wang Tian-Tian Yan Fang-Hua Li Hao Zhang Oraléou Sangué Djandja Yong Shuai Meisam Tabatabaei Daniel Sabi Takou School of Energy Science and Engineering Harbin Institute of Technology MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology School of Electrical Engineering and Automation Harbin Institute of Technology Guangdong Provincial Key Laboratory of Distributed Energy Systems Engineering Research Center of None-Food Biomass Efficient Pyrolysis and Utilization Technology of Guangdong Higher Education InstitutesDongguan University of Technology Higher Institution Centre of Excellence (HICoE) Institute of Tropical Aquaculture and Fisheries (AKUATROP)Universiti Malaysia Terengganu Department of Biomaterials Saveetha Dental CollegeSaveetha Institute of Medical and Technical Sciences école Polytechnique d'Abomey-Calavi University of Abomey-Calavi

It is highly desirable to seek green and sustainable technologies,such as employing photo thermal effects to drive energy catalysis processes to address the high energy demand and associated environmental impacts induced by the current *** photothermocatalysis process is an emerging research area with great potential in efficiently converting solar energy through various catalytic ***,achieving simultaneously high conversion efficiency,cyclability,and durability is still a daunting ***,tremendous work is still needed to enhance solar photo thermal catalytic conversion and promote its large-scale *** review developed the principles of coupling solar photon and thermal fields underlying the photothermal effect,exploration of efficient nanocatalysts,development of optofluidic reactor model,and photo thermal synergistic-driven CO2reduction *** ultimate goal was to provide an effective approach that can effectively convert solar energy into photocarriers/hot-electrons and heat,and importantly,can couple them to regulate catalysis reaction pathways toward the production of value-added fuel and chemical energy.

关键词： Photochemistry Photothermal CO 2 catalytic conversion Nanomaterial Solar fuels and chemicals

Numerical study on waste polyethylene pyrolysis driven by self-sustaining smoldering

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Science China(Technological Sciences) 2024年第2期67卷 627-638页

作者： PAN RuMing WU YiBo guene lougou bachirou SHUAI Yong DEBENEST Gérald School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Institut de Mecanique des Fluides de Toulouse(IMFT)-Universite de Toulouse CNRS-INPT-UPSToulouse 31400France

Polyethylene is the type of waste plastic that accounts for the most significant proportion of municipal solid *** polyethylene can be valorized via pyrolysis and produce value-added oil,gas,and *** the other hand,self-sustaining smoldering is an emerging technical means to deal with sand/soil contaminated by organic *** high-temperature heat generated by smoldering can be used as a heat source for pyrolyzing waste ***,this study investigates numerically the pyrolysis of waste polyethylene driven by self-sustaining smoldering.A novel 4-step lumped kinetic model is proposed for simulating the pyrolysis of waste *** results indicate that the operating parameters can determine the pyrolysis product yields by regulating the pyrolysis temperature and the volatile residence *** that higher temperatures and longer residence times favor the generation of shorter-chain pyrolysis products because of the intensified volatiles’secondary *** can be concluded that a high interface-wall heat transfer coefficient(400 W m^(-2)K^(-1)),a low PE content(0.20),a high char concentration(2.4%),and a moderate air velocity(0.040 m s^(-1))are beneficial to oil *** some extent,this study may broaden the boundaries for the application of self-sustained smoldering-driven pyrolysis.

关键词： self-sustained smoldering waste polyethylene thermal decomposition oil production waste valorization

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基于5kW非共轴聚光型模拟器性能数值研究

可再生能源 2023年第1期41卷 39-45页

作者：黄兴高方林 bachirou guene lougou 姚鑫华北理工大学冶金与能源学院河北唐山063210 哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150001

文章采用Tracepro软件对一个5 kW小型非共轴聚光型太阳能模拟器建立数学模型,通过实验验证了模型的准确性,并计算得到了太阳能模拟器中聚光镜的结构参数(旋转角度θ、后端开口直径、前端开口直径)和氙灯光源的安装误差(光源离焦、偏转角... 详细信息

文章采用Tracepro软件对一个5 kW小型非共轴聚光型太阳能模拟器建立数学模型,通过实验验证了模型的准确性,并计算得到了太阳能模拟器中聚光镜的结构参数(旋转角度θ、后端开口直径、前端开口直径)和氙灯光源的安装误差(光源离焦、偏转角)对太阳能模拟器焦平面热流密度峰值和辐照不均匀度的影响规律。研究结果表明:太阳能模拟器焦平面热流密度峰值与辐照不均匀度随聚光镜旋转角度呈现逐渐下降的趋势;热流密度峰值与辐照不均匀度随聚光镜后端开口直径增加分别呈下降和上升趋势;热流密度峰值与辐照不均匀度随前端开口直径增加分别呈上升和下降趋势;光源离焦对焦平面热流密度峰值有负影响;光源偏转角度对热流密度峰值和辐照不均匀度几乎无影响。文章研究结果对太阳能模拟器聚光镜结构及汇聚光斑性能优化提供了理论指导。

关键词：太阳能模拟器 Tracepro 热流密度辐照不均匀度

Current technology development for CO2 utilization into solar fuels and chemicals:A review

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Journal of Energy Chemistry 2020年第10期29卷 96-123页

作者： Azeem Mustafa bachirou guene lougou Yong Shuai Zhijiang Wang Heping Tan Key Laboratory of Aerospace Thermophysics of MIIT Harbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina

The continuous consumption of fossil fuels causes two important impediments including emission of large concentrations of CO2 resulting in global warming and alarming utilization of energy *** conversion of greenhouse gas CO2 into solar fuels can be an expedient accomplishment for the solution of both problems,all ***2 reutilization into valuable fuels and chemicals is a great challenge of the current *** to limitations in traditional approaches,there have been developed many novel technologies such as photochemical,biochemical,electrochemical,plasma-chemical and solar *** are currently being used for CO2 capture,sequestration,and utilization to transform CO2 into valuable products such as syngas,methane,methanol,formic acid,as well as fossil fuel consumption *** review summarizes different traditional and novel thermal technologies used in CO2 conversion with detailed information about their working principle,types,currently adopted methods,developments,conversion rates,products formed,catalysts and operating ***,a comparison of these novel technologies in terms of distinctive key features such as conversion rate,yield,use of earth metals,renewable energy,investment,and operating cost has been provided in order to have a useful review for future research direction.

关键词： Photochemical Biochemical Electrochemical Plasma chemical Solar thermochemical processes

Analysis of CO_2 utilization into synthesis gas based on solar thermochemical CH_4-reforming

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Journal of Energy Chemistry 2019年第1期28卷 61-72页

作者： bachirou guene lougou Yong Shuai Gédéon Chaffa Huang Xing Heping Tan Huibin Du School of Energy Science and Engineering Harbin Institute of Technology Key Laboratory of Aerospace Thermophysics of MIIT Harbin Institute of Technology Laboratory of Energetics and Applied Mechanics (LEMA) Polytechnic College of Abomey-Calavi Abomey-Calavi University College of Metallurgy and Energy North China University of Science and Technology College of Management and Economics Tianjin University

In this study, the solar thermochemical reactor performance for CO_2 utilization into synthesis gas(H_2+ CO) based on CH_4 reforming process was investigated in the context of carbon capture and utilization(CCU) technologies. The P1 radiation heat transfer model is adopted to establish the heat and mass transfer model coupled with thermochemical reaction kinetics. The reactor thermal behavior with direct heat transfer between gaseous reactant and products evolution and the effects of different structural parameters were evaluated. It was found that the reactor has the potential to utilize by ～60% of CO_2 captured with 40% of CH_4 co-fed into syngas(72.9% of H_2 and 27.1% of CO) at 741.31 k W/mof incident radiation heat flux. However, the solar irradiance heat flux and temperature distribution were found to significantly affect the reactant species conversion efficiency and syngas production. The chemical reaction is mainly driven by the thermal energy and higher species conversion into syngas was observed when the temperature distribution at the inner cavity of the reactor was more uniform. Designed a solar thermochemical reactor able to volumetric store concentrated irradiance could highly improve CCU technologies for producing energy-rich chemicals. Besides, the mixture gas inlet velocity, operating pressure and CO_2/CH_4 feeding ratio were crucial to determining the efficiency of CO_2 utilization to solar fuels. Catalytic CO_2-reforming of CH_4 to chemical energy is a promising strategy for an efficient utilization of CO_2 as a renewable carbon source.

关键词： Thermochemical reactor CO2 utilization Radiation flux and temperature distribution CH4-reforming Syngas

Analysis of radiation heat transfer and temperature distribu- tions of solar thermochemical reactor for syngas production

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Frontiers in Energy 2017年第4期11卷 480-492页

作者： bachirou guene lougou Yong SHUAI Xiang CHEN Yuan YUAN Heping TAN Huang XING School of Energy Science and Engineering Harbin Institute of Technology Harbin 15001 China College of Metallurgy and Energy North China University of Science and Technology Tangshan 063009 China

This paper investigated radiation heat transfer and temperature distributions of solar thermochemical reactor for syngas production using the finite volume discrete ordinate method （fvDOM） and P1 approximation for radiation heat transfer. Different parameters including absorptivity, emissivity, reflection based radiation scatter- ing, and carrier gas flow inlet velocity that would greatly affect the reactor thermal performance were sufficiently investigated. The fvDOM approximation was used to obtain the radiation intensity distribution along the reactor. The drop in the temperature resulted from the radiation scattering was further investigated using the P1 approx- imation. The results indicated that the reactor temperature difference between the P1 approximation and the fvDOM radiation model was very close under different operating conditions. However, a big temperature difference which increased with an increase in the radiation emissivity due to the thermal non-equilibrium was observed in the radiation inlet region. It was found that the incident radiation flux distribution had a strong impact on the temperature distribution throughout the reactor. This paper revealed that the temperature drop caused by the boundary radiation heat loss should not be neglected for the thermal performance analysis of solar thermochemical reactor.

关键词： solar thermochemical reactor incident radia-tion flux temperature distribution radiation absorptivity,radiation emissivity thermal performance analysis

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甲烷水蒸气重整制氢研究进展

石油与天然气化工 2022年第1期51卷 53-61页

作者：黄兴赵博宇 bachirou guene lougou 张昊刘慧敏华北理工大学冶金与能源学院哈尔滨工业大学能源科学与工程学院华中科技大学煤燃烧国家重点实验室

氢气由于燃烧发热量高、储量丰富、环境友好,被誉为“21世纪绿色清洁能源”,近年来,甲烷水蒸气重整制氢方法备受关注。但是甲烷重整反应的复杂性及反应机理的不确定性是制约甲烷水蒸气重整制氢工业生产的重要因素。从甲烷水蒸气重整制... 详细信息

氢气由于燃烧发热量高、储量丰富、环境友好,被誉为“21世纪绿色清洁能源”,近年来,甲烷水蒸气重整制氢方法备受关注。但是甲烷重整反应的复杂性及反应机理的不确定性是制约甲烷水蒸气重整制氢工业生产的重要因素。从甲烷水蒸气重整制氢过程、反应机理、热力学分析、催化剂种类以及反应器选择5个方面对重整过程进行了归纳与分析;阐述了甲烷水蒸气重整制氢过程中吉布斯自由能的变化趋势、工况参数对重整反应的影响规律、重整过程反应器的选择、重整反应过程的微观机理以及不同催化剂对重整反应的影响程度;全面总结了甲烷水蒸气重整制氢过程的变化规律;展望了甲烷水蒸气重整制氢的发展前景与研究方向。

关键词：甲烷水蒸气重整制氢反应机理热力学催化剂

Application of CoFe_(2)O_(4)-NiO nanoparticle-coated foam-structured material in a high-flux solar thermochemical reactor

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Science China(Technological Sciences) 2023年第11期66卷 3276-3286页

作者： ZHANG Hao ZHANG XiaoMi YANG DaZhi SHUAI Yong guene lougou bachirou PAN QingHui WANG FuQiang School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of New Energy Harbin Institute of Technology at WeihaiWeihai 264209China

The splitting of carbon dioxide through the two-step solar thermochemical cycle presents enormous potential,for it holds the dual functionalities of solar fuel production and carbon-based energy ***,the industrialization of this technology is impeded by two critical factors:The absence of fully developed oxygen carriers and advanced reaction devices that deliver exceptional *** order to identify a potentially effective oxygen carrier,50 wt%NiO-modified Co Fe_(2)O_(4)is selected as the active component and characterized by means of thermogravimetry,scanning electron microscopy,and energy dispersive spectroscopy,so as to clarify its oxygen exchange capacity,micromorphology and elemental composition in high-temperature thermochemical ***,nanoparticle-coated foam-structured materials are prepared in combination with Si C ceramic foam for experimental testing in a high-flux solar *** results indicate that a peak CO yield of 1.96 m L min^(-1)g^(-1)can be gained in a 1500–1250 K preliminary test,demonstrating the application potential of the *** contrast to conventional redox materials,the CO_(2)activity of the materials synthesized in this study exhibits an enhancement with rising oxidation *** means that isothermal cycles can potentially achieve higher conversion and fuel yield than non-isothermal cycles,while simultaneously reducing the amount of irreversible heat loss during high-temperature *** the estimated steadystate thermal efficiency of the solar reactor can reach up to 42%,further optimization of the reactor design is necessary to enhance energy conversion efficiency,as it is partially limited by the dimensions of the reaction chamber.

关键词： solar thermochemistry CO_(2)splitting two-step redox cycle iron-base oxygen carrier reactor design