Selective reduction of NO using fatty acid methyl esters (FAMEs) as the reducing agents was investigated over 3 wt% Ag/Al2O3 catalyst. NO reduction with C6-C14 saturated FAMEs showed volcano-type temperature dependence, as NO reduction started at around 250℃, reached the maximum at around 400℃, and then decreased at higher temperatures. NO reduction efficiency increased slightly as the fatty acid chain length decreased. The efficiency of saturated FAME for selective catalytic reduction is

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... or to that of the corresponding unsaturated FAME. The catalysts showed stable activity at temperatures above 350℃, but deactivated with time due to coking below 300℃. The performance of selective NO reduction with saturated FAME was roughly equal to that with n-decane and n-hexadecane.