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Effects of Natural Gas Fuel Composition on Exhaust Emission Characteristics
ipc-8-95/9530625

Authors

Mitsunori Ishii - Nissan Motor Co., Ltd.
Shizuo Ishizawa - Nissan Motor Co., Ltd.
Toyoaki Nakagawa - Nissan Motor Co., Ltd.
Ryuichi Idoguchi - Nissan Motor Co., Ltd.
Eiji Inada - Nissan Motor Co., Ltd.
Tou Tanaka - Nissan Motor Co., Ltd.

Abstract

Analyses were made of exhaust emission characteristics using four types of natural-gas fuels, which were selected in consideration of the variation in fuel compositions on the market. The results showed that engine-out emissions of NOx and CO2 decreased with an increasing content of methane in the test fuels, whereas the total hydrocarbon (THC) level tended to increase. Engine-out THC emissions contained small quantities of ethylene, acetylene and other species not present in the fuels. The concentrations of methane and other HC species measured in engine-out THC emissions correlated closely with the respective content of these species in the test fuels.

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