Scholarlink

The Lean NOx Trap is one of the after-exhaust treatment system for the IC engines, these are specifically designed to reduce the NOx emissions. Mainly three important processes occur here with quick succession of each other, viz. oxidation process of NO to NO2, capture of NO2 over the alkali earth metals in the nitrate form, NO2 is getting regenerated and getting reduced. On a conventional setup, the above-mentioned processes take place over a rare platinum group of metals (PGM). The process of lean and rich cycles occurs in turns and aids in the regeneration and reduction stage due to the presence of unburned hydrocarbons and carbon monoxides. The CO and HC generated during the rich operation is used as a reducing agent very much alike ammonia in Selective Catalytic Reduction (SCR). Good adsorption and reduction characteristics have been shown by the Perovskites which has the structure of XCoO3(here X is Sr, Ba, etc.), as these materials show good NO oxidation capacity, they can be used as LNTs. This investigation has been conducted for the perovskite-based catalyst coated on novel substrate-based silicon carbide foams for the treatment of exhaust gases. It has been observed that there has been a reduction of 13% and 8.3% in the NOx and CO emissions, respectively, and an increase of 4.6% and 33% in HC and CO2 emissions, respectively.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Performance Testing of a Novel Perovskite-Based Catalytic Convertor for Emission Reduction of a CI Engine Under Different Equivalence Ratios

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Benjamin E. Basker,
  • Abhishek Paul,
  • Sumita Debbarma

摘要

The Lean NOx Trap is one of the after-exhaust treatment system for the IC engines, these are specifically designed to reduce the NOx emissions. Mainly three important processes occur here with quick succession of each other, viz. oxidation process of NO to NO2, capture of NO2 over the alkali earth metals in the nitrate form, NO2 is getting regenerated and getting reduced. On a conventional setup, the above-mentioned processes take place over a rare platinum group of metals (PGM). The process of lean and rich cycles occurs in turns and aids in the regeneration and reduction stage due to the presence of unburned hydrocarbons and carbon monoxides. The CO and HC generated during the rich operation is used as a reducing agent very much alike ammonia in Selective Catalytic Reduction (SCR). Good adsorption and reduction characteristics have been shown by the Perovskites which has the structure of XCoO3(here X is Sr, Ba, etc.), as these materials show good NO oxidation capacity, they can be used as LNTs. This investigation has been conducted for the perovskite-based catalyst coated on novel substrate-based silicon carbide foams for the treatment of exhaust gases. It has been observed that there has been a reduction of 13% and 8.3% in the NOx and CO emissions, respectively, and an increase of 4.6% and 33% in HC and CO2 emissions, respectively.