氮掺杂锌铝水滑石衍生复合氧化物上羰基硫的催化水解性能  

The catalytic hydrolysis performance of carbonyl sulfide over N-doped composite oxides derived from zinc-aluminum hydrotalcite

作　　者：张雨萌 魏征 张鑫 张凤莲 蒋国霞[1] 郝郑平[1,2] Zhang Yumeng;Wei Zheng;Zhang Xin;Zhang Fenglian;Jiang Guoxia;Hao Zhengping(Key Laboratory of Environmental Nanotechnology and Health Effects,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;National Engineering Laboratory for VOCs Pollution Control Material & Technology,Research Center for Environmental Material and Pollution Control Technology,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]中国科学院生态环境研究中心环境纳米技术与健康效应重点实验室,北京100085 [2]中国科学院大学环境材料与污染控制技术研究中心挥发性有机物污染控制材料与技术国家工程实验室,北京101408

出　　处：《工业催化》2020年第11期31-36,共6页Industrial Catalysis

基　　金：国家重点研发计划项目(2018YFA0209302);国家自然科学基金(21976177,21976176,21507148);中国科学院大学青年教师能力提升项目。

摘　　要：采用共沉淀法制备锌铝水滑石,在此基础上分别考察空气和氨气气氛焙烧的类水滑石衍生复合氧化物(LDO)对羰基硫(COS)水解的催化性能。通过氮气吸附-脱附、X光电子能谱(XPS)、X射线衍射(XRD)和程序升温脱附(TPD)等表征手段对催化剂的结构和物化性能进行了系统研究。结果表明,N掺杂LDO增加了材料的碱强度和碱量,减少了表面氧物种OS的含量,提高了材料的稳定性和硫容。反应连续进行1200 min,COS转化率仍能保持96%。Zinc-aluminum hydrotalcite was prepared by co-precipitation method.The catalytic hydrolysis performance of carbonyl sulfide(COS)over composite oxides(LDO)derived from zinc-aluminum hydrotalcite by calcining under air and NH3 was investigated.The structure and physic-chemical properties of the catalysts were characterized by the N2 adsorption-desorption measurement,X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD),temperature-programmed desorption(TPD)and so on.For N-doping catalyst,the improved catalytic performance(activity,stabitily and sulfur capacity)was due mainly to the decrease of the amount of O species on the surface(OS)and the enhanced basicity.The COS conversion could be attained as high as 96%even after 1200 min of reaction.

关 键 词：催化剂工程 羰基硫 催化水解 锌铝水滑石 复合氧化物 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]