Department of Chemical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi, India.
Department of Chemical Engineering, National Institute of Technology, Rourkela, Odisha, India.
Environ Sci Pollut Res Int. 2020 Nov;27(32):39977-40000. doi: 10.1007/s11356-020-10361-7. Epub 2020 Aug 15.
Compressed natural gas is an alternative green fuel for automobile industry. Recently, the Indian government is targeting to replace all the conventional fuel vehicles by compressed natural gas (CNG) automobiles due to its several merits. Still, the presence of a significant amount of CO, CH, and NO gases in the CNG vehicle exhaust are quiet a matter of concern. Thus, to control the emissions from CNG engines, the major advances are under development of and oxidation is one of them in catalytic converter. In literature, the catalysts such as noble and non-noble metals have been reported for separate oxidation of CO and CH. Experimentally, it was found that non-noble metal catalysts are preferred due to its low cost, good thermal stability, and molding tractability. In literature, several articles have been published for CO and CH oxidation but no review paper is still available. Thus, the present review provides a comprehensive overview of separate as well as simultaneous CO and CH oxidation reactions for CNG vehicular emission control.
压缩天然气是汽车工业的一种替代绿色燃料。最近，由于其诸多优点，印度政府正计划用压缩天然气（CNG）汽车取代所有传统燃料汽车。不过，CNG 汽车尾气中仍然存在大量的 CO、CH 和 NO 气体，这是一个相当令人担忧的问题。因此，为了控制 CNG 发动机的排放，正在进行重大的技术改进，其中之一是在催化转化器中进行氧化。在文献中，已经报道了贵金属和非贵金属催化剂用于分别氧化 CO 和 CH。实验发现，由于成本低、热稳定性好、成型性能好，非贵金属催化剂更受欢迎。在文献中，已经发表了几篇关于 CO 和 CH 氧化的文章，但仍没有综述性论文。因此，本综述提供了关于 CNG 车辆排放控制的 CO 和 CH 分别氧化以及同时氧化反应的全面概述。
