Abstract
Compressed biomethane gas (CBG) is an interesting alternative fuel that can be used to solve fossil fuel crisis problems. Nevertheless, it is concerned about engine performance and exhaust gas emission. In additions, CBG can be produced from agricultural harvesting residues and the food industry that is a good opportunity for utilizing biogas as a vehicle fuel. The aims of this research are comparative analysis of the engine performance and exhaust emission on a CBG and compressed natural gas (CNG) fuelled in a spark ignition engine on engine performance and emissions. The engine has been modified to operate with both fuel gases under constant engine load (50% maximum load) and engine speed (1500 - 3500 rpm). The results show that the engine operated with CBG has higher thermal efficiency with lower the nitrogen oxide (NOx) and hydrocarbon (HC) emissions compared with CNG. Thus, the CBG fuel can be used as an alternative fuel to substitute CNG fuel in the spark ignition engine. In additions, the results give the useful information for developed and optimised the engine operated with compression biogas to impact the higher demand of automotive fuels in the future.
Highlights
The scarcity of fossil fuel and the extremely high demand and become an important issue of a national industrial and living
The pressure in combustion chamber was dropped under 3000 rpm for compressed natural gas (CNG) combustion it has no significant effect on engine using with compressed biomethane gas (CBG)
The engine fueling with CBG produces higher brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE) compared to those of CNG
Summary
The scarcity of fossil fuel and the extremely high demand and become an important issue of a national industrial and living. The fuels that will be used in the automotive sector, which are important role in driving the economy in both production and transportation. The alternative fuels that will be used to solve this problem should be renewable fuel. The properties of alternative fuel should be similar efficiency to the fossil fuels. Fuel has emitted less engine out pollution than the fossil fuel. The automotive pollutions issue is another important factor such as greenhouse gas emissions which damages to the Earth's atmosphere and climate from internal combustion engine. There is exigency discreet to use for conserve fossil fuel and replace it by other alternatives wherever possible
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