Emission reduction from diesel engine using fumigation methanol and diesel oxidation catalyst

Z. H. Zhang, Chun Shun Cheung, Tat Leung Chan, C. D. Yao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

91 Citations (Scopus)

Abstract

This study is aimed to investigate the combined application of fumigation methanol and a diesel oxidation catalyst for reducing emissions of an in-use diesel engine. Experiments were performed on a 4-cylinder naturally-aspirated direct-injection diesel engine operating at a constant speed of 1800 rev/min for five engine loads. The experimental results show that at low engine loads, the brake thermal efficiency decreases with increase in fumigation methanol; but at high loads, it slightly increases with increase in fumigation methanol. The fumigation method results in a significant increase in hydrocarbon (HC), carbon monoxide (CO), and nitrogen dioxide (NO2) emissions, but decrease in nitrogen oxides (NOx), smoke opacity and the particulate mass concentration. For the submicron particles, the total number of particles decreases. In all cases, there is little change in geometrical mean diameter of the particles. After catalytic conversion, the HC, CO, NO2, particulate mass and particulate number concentrations were significantly reduced at medium to high engine loads; while the geometrical mean diameter of the particles becomes larger. Thus, the combined use of fumigation methanol and diesel oxidation catalyst leads to a reduction of HC, CO, NOx, particulate mass and particulate number concentrations at medium to high engine loads.
Original languageEnglish
Pages (from-to)4497-4505
Number of pages9
JournalScience of the Total Environment
Volume407
Issue number15
DOIs
Publication statusPublished - 15 Jul 2009

Keywords

  • Diesel oxidation catalyst
  • Euro V diesel
  • In-use diesel engine
  • Methanol
  • Particulate emissions

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

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