Reduction of methane slip from gas engines by O2 concentration control using gas permeation membrane

研究成果: Contribution to journalConference article査読

6 被引用数 (Scopus)

抄録

With progression of so-called shale gas revolution, gas engines are expected as a strong substitute for diesel engines in marine fields, where strict emission regulations have been recently introduced. Thanks to the sulphur-free and low-carbon features of natural gas, gas engines emit much less CO2 and particulate matter than marine diesels burning heavy fuel oil. The premixed lean-burn gas engines, however, suffer two massive flaws. One is abnormal combustion called knocking and the other is a methane slip, which substantially means the unburned methane emitted into exhaust ports. One of the methane slip sources is thought to be flame quenching inside dead volumes around a combustion chamber or inside a boundary layer near a cylinder wall. Only supportive measures like cutdown of crevice volume have been conducted against the unburned methane. The present study proposes novel and essential methane slip reduction for the first time using a gas permeation membrane, of which permeability to oxygen molecules excels the one to nitrogen molecules. The membrane inserted between a main compressor and a charge cooler helps to form uneven oxygen gradient inside a combustion chamber. After the feasibility check of the complicated charging system based on a one-dimensional engine simulator, the potential of the methane slip reduction is successfully examined through CFD simulation with detailed chemical analysis.

本文言語英語
ジャーナルSAE Technical Papers
11
DOI
出版ステータス出版済み - 1 1 2013
イベントSAE/KSAE 2013 International Powertrains, Fuels and Lubricants Meeting, FFL 2013 - Seoul, 大韓民国
継続期間: 10 21 201310 23 2013

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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