Mechanical Engineering Department, National Institute of Technology Karnataka, Surathkal, 575025, India.
Environ Sci Pollut Res Int. 2018 Dec;25(35):35034-35047. doi: 10.1007/s11356-018-3487-8. Epub 2018 Oct 28.
Vehicular pollution has become a major problem in urban areas due to the exponential rise in the number of automobiles. Typical exhaust emissions which include nitrogen oxides (NO), hydrocarbons (HC), carbon monoxide (CO), soot, and particulate matter (PM) undoubtedly have an unpleasant effect on the environment. Several pollution control bodies are taking this subject seriously and issuing stringent emission norms which are to be complied strictly. Thus, regulation of these harmful pollutants is the need of the hour. Alternative fuels such as biodiesels and alcohols which are considered as a potentially viable solution for the problem of fossil fuel depletion also tend to require exhaust gas after-treatment in order to comply with the upcoming emission norms. Hence, this paper attempts to give a brief insight on the development and advances of different after-treatment devices like diesel particulate filter (DPF), lean NO trap (LNT), diesel oxidation catalyst (DOC), and selective catalytic reduction (SCR).
由于汽车数量的指数级增长，车辆污染已成为城市地区的一个主要问题。典型的尾气排放物包括氮氧化物（NO）、碳氢化合物（HC）、一氧化碳（CO）、烟尘和颗粒物（PM），它们无疑对环境有不良影响。一些污染控制机构正在认真对待这个问题，并发布了严格的排放标准，必须严格遵守。因此，对这些有害污染物进行监管是当前的需要。生物柴油和醇类等替代燃料被认为是解决化石燃料枯竭问题的一种潜在可行的解决方案，但也需要废气后处理才能符合即将出台的排放标准。因此，本文试图简要介绍不同后处理装置的发展和进步，如柴油机颗粒过滤器（DPF）、稀燃氮氧化物捕集器（LNT）、柴油机氧化催化剂（DOC）和选择性催化还原（SCR）。
