Effect of Diesel/methanol compound combustion on Diesel engine combustion and emissions

Chunde Yao, Chun Shun Cheung, Chuanhui Cheng, Yinshan Wang, Tat Leung Chan, Shuncheng Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

233 Citations (Scopus)


This paper introduces a Diesel/methanol compound combustion system (DMCC) and its application to a naturally aspirated Diesel engine with and without an oxidation catalytic converter. In the DMCC system, there are two combustion modes taking place in the Diesel engine, one is diffusion combustion with Diesel fuel and the other is premixed air/methanol mixture ignited by the Diesel fuel. Experiments were conducted on a four cylinder DI Diesel engine, which had been modified to operate in Diesel/methanol compound combustion. Experiments were conducted at idle and at five engine loads at two levels of engine speeds to compare engine emissions from operating on pure Diesel and on operating with DMCC, with and without the oxidation catalytic converter. The experimental results show that the Diesel engine operating with the DMCC method could simultaneously reduce the soot and NOx emissions but increase the HC and CO emissions compared with the original Diesel engine. However, using the DMCC method coupled with an oxidation catalyst, the CO, HC, NOx and soot emissions could all be reduced.
Original languageEnglish
Pages (from-to)1696-1704
Number of pages9
JournalEnergy Conversion and Management
Issue number6
Publication statusPublished - 1 Jun 2008


  • Combustion
  • Diesel engine
  • Emissions
  • Methanol
  • Oxidation catalyst

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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