Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academyof Sciences
Zhejiang Key Laboratory of Urban Environmental Processes and PollutionControl, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academyof Sciences
University of Chinese Academy of Sciences

甲烷是天然气的主要成分,广泛应用于电厂、天然气车和各种化学品合成等领域。 但由于其具有强温室效应,使用过程中的甲烷泄露和排放会对环境造成重大影响。 甲烷直接燃烧净化所需的反应温度高,常伴随高温副产物 NOx等,对环境危害较大。 催化燃烧是一种更为高效清洁的处理技术,而该技术的核心是高效稳定的催化剂。 文章综述了近年来国内外用于甲烷燃烧的贵金属和非贵金属催化剂研究进展。 两类催化剂各有特点,其中贵金属催化剂低温活性优异,载体选择丰富,但是成本较高和易发生高温团聚成为制约其工业应用的重要原因。 非贵金属催化剂成本低,热稳定性优异,但起燃温度较高,仅适用于高温工况。 工业尾气中常含有大量水蒸气和微量 SO2,为了满足长期稳定的工业应用需求,无论贵金属还是非贵金属催化剂,其抗中毒能力仍需改进提升。 此外,文章总结了贵金属和非贵金属催化剂活性物种、反应机理研究进展,以及工业化应用的可行性,并展望了该领域未来可能的发展方向。

Methane as the main component of natural gas, has been widely used in power plants, natu⁃ral gas automobiles, and the synthesis of numerous compounds. However, the leakage and emission ofmethane can induce severe environmental issues due to its strong greenhouse effects. The reaction tem⁃perature of direct combustion of methane is so high that is often accompanied by high-temperature byproducts, such as NOx, which would cause air pollution issues. Catalytic combustion is an efficient andeco-friendly treatment technology for methane emission control, and the key for this technology is thedevelopment of efficient and stable catalysts. This paper reviews the recent research progress on noblemetal catalysts and non-noble metal catalysts for methane combustion. The noble metal catalysts haveexcellent low-temperature activity and various carrier selections, but their high cost and easy agglomer⁃ation restrict the industrial application. Non-noble metal catalysts have low cost and excellent thermalstability, but their light-off temperature is high, which can only be used for high-temperature applica⁃tions. Industrial exhaust gas often contains a large amount of water vapor and trace SO2. To meet thedemand of long time and stable industrial applications, the H2O and SO2 poisoning resistances of meth⁃ane combustion catalysts still need to be improved. In addition, this paper summarizes the recent re⁃search progress on active species and reaction mechanism for methane combustion, and then discussesthe prospect of noble metal catalysts and non-noble metal catalysts for industrial applications and thefuture research directions for methane catalytic combustion.

国家重点研发计划项目(2022YFC3701804);国家自然科学基金项目(U20B6004)

0 引 言
1 贵金属催化剂
1.1 Pd基催化剂
1.2 Pt基催化剂
1.3 Au基催化剂
1.4 多组分贵金属催化剂
2 非贵金属催化剂
2.1 金属氧化物催化剂
2.2 钙钛矿催化剂
2.3 尖晶石催化剂
2.4 六铝酸盐催化剂
3 甲烷催化燃烧反应机理
4 结论与展望

蔡洁莹, 李杰, 张燕, 等. 甲烷燃烧催化剂研究进展[J]. 能源环境保护, 2023, 37(2): 62-72.

CAI Jieying, LI Jie, ZHANG Yan, et al. Research progress on methane combustion catalysts[J]. Energy Environ⁃mental Protection, 2023, 37(2): 62-72.