【摘要】 利用原位漫反射傅立叶变换红外光谱、X光衍射、BET、离子色谱(IC)等手段,对Al2O3常温催化水解羰基硫(OCS)的氧中毒机理进行了研究.实验表明,表面—OH在OCS的催化水解反应中起关键作用,表面HSCO2-物种是OCS催化水解反应的中间体.有氧条件下,利用原位红外光谱和离子色谱检测到了催化剂表面SO42-的生成.SO24-在催化剂表面积累是Al2O3上OCS常温催化水解氧中毒的主要原因.更多还原

【Abstract】 The oxygen poisoning mechanism of the catalytic hydrolysis of carbonyl sulfide(OCS)over alumina at room temperature was investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy(in situ DRIFTS),XRD,BET,and ion chromatograph(IC).The surface hydroxyl(-OH)species triggered the catalytic hydrolysis of OCS on Al2O3,with the formation of surface hydrogen thiocarbonate(HSCO-2)species as a key intermediate.Surface SO2-4 was identified with in situ DRIFTS and IC.It was found that the accumulation of sulfate on catalyst led to the poisoning of Al2O3 in the presence of oxygen.更多还原