As a primary type of clean energy,methane is also the second most important greenhouse gas after CO2 due to the high global warming potential.Large quantities of lean methane(0.1-1.0 vol％)are emitted into the atmosphere without any treatment during coal mine,oil,and natural gas production,thus lead-ing to energy loss and greenhouse effect.In general,it is challenging to utilize lean methane due to its low concentration and flow instability,while catalytic combustion is a vital pathway to realize an efficient utilization of lean methane owing to the reduced emissions of polluting gases(e.g.,NOx and CO)during the reaction.In particular,to efficiently convert lean methane,it necessitates both the designs of highly active and stable heterogeneous catalysts that accelerate lean methane combustion at low temperatures and smart reactors that enable autothermal operation by optimizing heat management.In this review,we discuss the in-depth development,challenges,and prospects of catalytic lean methane combustion technology in various configurations,with particular emphasis on heat management from the point of view of material design combined with reactor configuration.The target is to describe a framework that can correlate the guiding principles among catalyst design,device innovation and system optimization,inspiring the development of groundbreaking combustion technology for the efficient utilization of lean methane.

Xiangbo Feng;Lei Jiang;Danyang Li;Shaopeng Tian;Xing Zhu;Hua Wang;Chi He;Kongzhai Li

Xi'an Key Laboratory of Advanced Photoelectronics Materials and Energy Conversion Device,School of Science,Xijing University,Xi'an 710123,Shaanxi,China;State Key Laboratory of Multiphase Flow in Power Engineering,School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;National Engineering Laboratory for VOCs Pollution Control Material&Technology,University of Chinese Academy of Sciences,Beijing 101408,China

能源化学

[1]Xiangbo Feng;Lei Jiang;Danyang Li;Shaopeng Tian;Xing Zhu;Hua Wang;Chi He;Kongzhai Li-.Progress and key challenges in catalytic combustion of lean methane)[J].能源化学,2022(12):173-215

autothermal

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