文献类型：期刊文献

英文题名：In situ IR Study of COS Hydrolysis over Lanthanum Oxysulfide: Effect of O₂, H₂S and SO₂

作者：Jin Xing-Mei[1];Ma Jian-Xin[2];Zhou Wei[2]

机构：[1]E China Univ Sci & Technol, Coll Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Tongji Univ, Clean Energy Automot Engn Ctr, Shanghai 200092, Peoples R China

年份：2009

卷号：30

期号：6

起止页码：1194

外文期刊名：CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000267873700027)】；

语种：英文

外文关键词：Carbonyl sulfide; Hydrolysis; In situ IR; Rare earth oxide; Rare earth oxysulfide; Temperature programmed desorption

摘要：The effect of the presence of O-2, H2S and SO2 in the feed on the COS hydrolysis was studied comparatively over La2O2S and gamma-Al2O3 Compared to the traditional gamma-Al2O3 catalyst, La2O2S was observed to be obviously superlosity in resistance to the poisoning of oxygen and sulfide at higher temperature. A certain amount of O-2 or H2S + O-2 has no effect on the activity of La2O2S, while decrease the activity of gamma-Al2O3 significantly. The presence of SO2 would decrease the activity of both catalysts, but the impact on La2O2S weakens as the temperature rises. The analysis of TPD and in situ IR reveals that O-2, H2S and SO2 shows different adsorption characteristics over La2O2S and gamma-Al2O3. Hence, COS proceed the two catalysts via different reaction mechanisms. Spectroscopies of H2S, O-2 in situ IR reveal that La2O2S hydrolyze via Eley-Rideal mechanism. The rare-La2O2S catalyst displays an excellent poisoing performance, because SO2 can transfer the lattice S2- inside the La2O2S.