Selective Catalytic Reduction of NOx with CH4 over the In/Sulfated TiO2 Catalyst

Selective Catalytic Reduction of NOx with CH4 over the In/Sulfated TiO2 Catalyst
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In/硫酸化 TiO2 催化剂上 CH4 选择性催化还原 NOx

DOI:
10.1007/s10562-007-9360-x
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发表时间:
2008-04
期刊:
影响因子:
2.8
通讯作者:
--
中科院分区:
化学4区
文献类型:
--
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钨酸化的TiO 2(WTi)、钨酸化的Fe 2 O3(WFe)、钨酸化的SnO 2(WSn)、硫酸化的TiO 2(STi)、硫酸化的Fe 2 O3(SFe)和硫酸化的SnO 2(SSn)用作用于NO与甲烷的SCR的In和Pd催化剂的载体。结果发现,在所有研究的催化剂中,铟负载量为2%的In/STi催化剂显示出最高的NOx转化率(在450 °C和12,000 h-1下为39%)。STi载体的酸强度对于InO+位点的形成非常重要,InO+位点被认为是NO还原的活性位点。In/STi催化剂的活性可以通过增加STi载体的表面积来提高。In/STi催化剂最吸引人的特点是其对SO2的高抗性。
Tungstated TiO2 (WTi), tungstated Fe2O3 (WFe), tungstated SnO2 (WSn), sulfated TiO2 (STi), sulfated Fe2O3 (SFe), and sulfated SnO2 (SSn) are used as the support for the In and Pd catalysts for the SCR of NO with methane. It was found that the In/STi catalyst with a 2% indium loading showed the highest NOx conversion (39% at 450 °C and 12,000 h−1) among all of the catalysts studied. The acid strength of the STi support was very important for the formation of the InO+ site, which was thought to be the active site for NO reduction. The activity of the In/STi catalyst can be improved by increasing the surface area of the STi support. The most attractive feature of the In/STi catalyst is its high resistance for SO2.
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