Effects of hydrogen and oxygenated hydrocarbons on the activity and SO2-tolerance of Ag/Al2O3 for selective reduction of NO
Effects of hydrogen and oxygenated hydrocarbons on the activity and SO2-tolerance of Ag/Al2O3 for selective reduction of NO
复制标题
DOI：
10.1016/j.apcatb.2006.08.009
复制
发表时间：
2007-02-08
影响因子：
22.1
通讯作者：
Satsuma, Atsushi
中科院分区：
文献类型：
--
作者：
Shimizu, Ken-Ichi;Tsuzuki, Masao;Satsuma, Atsushi
采用10种还原剂（Et2O、ETBE、EtOH、1-丙醇、2-丙醇、t-丁醇、1-丙醇、乙酸乙酯、丙酮、C3H8），研究了Ag/Al2O3催化剂在H-2存在下，烃类（HC-SCR）和HC-SCR选择性催化还原NO的脱硝性能和耐so2能力。在各种还原剂中，Et2O对HC-SCR和H-2-HC-SCR的脱硝活性最高。所有还原剂的低温区脱硝活性均通过H-2共加料得到提高。与氧合物相比，C3H8的活性增强程度更高，这与我们之前提出的H-2通过促进烷烃氧化活化成部分氧化的碳氢化合物中间体来增强脱nox活性的观点一致。采用Et2O、ETBE和EtOH考察还原剂和H-2共进料对so2耐受性的影响。结果表明，氧合物的使用和H-2的共投料提高了对二氧化硫的耐受性。(c) 2006 Elsevier B.V.版权所有
De-NOx performance and SO2-tolerance of Ag/Al2O3 catalyst for selective catalytic reduction of NO by hydrocarbon (HC-SCR) and HC-SCR in the presence of H-2 (H-2-HC-SCR) were investigated using 10 types of reductant (Et2O, ETBE, EtOH, 1-propanol, 2-propanol, t-butanol, 1-propanal, ethyl acetate, acetone, C3H8). Among various reductant tested, Et2O was most effective for achieving high de-NOx activity for HC-SCR and H-2-HC-SCR. For all the reductants, de-NOx activity at low temperature region was increased by H-2 co-feeding. Degree of activity enhancement was higher for C3H8 than for oxygenates, which is consistent with our previous proposal that H-2 enhances de-NOx activity by promoting the oxidative activation of alkane into partially oxidized hydrocarbon intermediates. Effects of reductants and H-2 co-feeding on the SO2-tolerance were examined using Et2O, ETBE, and EtOH. The result showed that use of oxygenates as well as H-2 co-feeding resulted in the higher SO2-tolerance. (c) 2006 Elsevier B.V. All rights reserved.