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

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalSAE Technical Papers
Volume11
DOIs
Publication statusPublished - Jan 1 2013
EventSAE/KSAE 2013 International Powertrains, Fuels and Lubricants Meeting, FFL 2013 - Seoul, Korea, Republic of
Duration: Oct 21 2013Oct 23 2013

Fingerprint

Gas engines
Permeation
Methane
Membranes
Gases
Combustion chambers
Residual fuels
Molecules
Oxygen
Fuel oils
Engine cylinders
Diesel engines
Compressors
Quenching
Natural gas
Computational fluid dynamics
Boundary layers
Sulfur
Simulators
Engines

All Science Journal Classification (ASJC) codes

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

Cite this

@article{b789082f14204811b840da8ab2eefed7,
title = "Reduction of methane slip from gas engines by O2 concentration control using gas permeation membrane",
abstract = "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.",
author = "Hiroshi Tajima and Daisuke Tsuru",
year = "2013",
month = "1",
day = "1",
doi = "10.4271/2013-01-2618",
language = "English",
volume = "11",
journal = "SAE Technical Papers",
issn = "0148-7191",

}

TY - JOUR

T1 - Reduction of methane slip from gas engines by O2 concentration control using gas permeation membrane

AU - Tajima, Hiroshi

AU - Tsuru, Daisuke

PY - 2013/1/1

Y1 - 2013/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84890331183&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84890331183&partnerID=8YFLogxK

U2 - 10.4271/2013-01-2618

DO - 10.4271/2013-01-2618

M3 - Conference article

AN - SCOPUS:84890331183

VL - 11

JO - SAE Technical Papers

JF - SAE Technical Papers

SN - 0148-7191

ER -