Selective Catalytic Reduction of NO with Fatty Acid Methyl Ester as Reductant over Ag/Al<sub>2</sub>O<sub>3</sub> Catalyst

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  • Suzuki Kunio
    Research Center for New Fuels and Vehicle Technology, National Institute of Advanced Industrial Science and Technology (AIST)
  • Haneda Masaaki
    Research Center for New Fuels and Vehicle Technology, National Institute of Advanced Industrial Science and Technology (AIST)
  • Hamada Hideaki
    Research Center for New Fuels and Vehicle Technology, National Institute of Advanced Industrial Science and Technology (AIST)

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Other Title
  • 脂肪酸メチルエステルを還元剤とするAg/Al<sub>2</sub>O<sub>3</sub>触媒による選択的NO還元反応
  • 脂肪酸メチルエステルを還元剤とするAg/Al2O3触媒による選択的NO還元反応
  • シボウサン メチル エステル オ カンゲンザイ ト スル Ag Al2O3 ショクバイ ニ ヨル センタクテキ NO カンゲン ハンノウ

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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°C, reached the maximum at around 400°C, 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 superior to that of the corresponding unsaturated FAME. The catalysts showed stable activity at temperatures above 350°C, but deactivated with time due to coking below 300°C. The performance of selective NO reduction with saturated FAME was roughly equal to that with n-decane and n-hexadecane.

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