Investigation on Slective Oxidation of CO in Hydrogen-Rich Gas for Nano Au/ZnO/TiO2 Catalyst

Journal of Petrochemical Universities ›› 2007, Vol. 20 ›› Issue (1): 63-66.

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Investigation on Slective Oxidation of CO in Hydrogen-Rich Gas for Nano Au/ZnO/TiO₂ Catalyst

WANG Chao1 , XU Xin2 , LUO Guo-hua2

1. College of Material and Chemical Engineering, Beijing University of Chemical Technology，Beijing 100029,P.R.China;
2. College of Material and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617,P.R.China

Received:2006-09-25 Published:2007-03-20 Online:2017-06-28

纳米Au/ZnO/TiO2 催化剂对富氢气体中CO选择性氧化

王超1, 徐新2, 罗国华2

1.北京化工大学材料与化工学院,北京100029; 2.北京石油化工学院材料与化工学院,北京102617

作者简介:王超(1977-),男,河北唐山市,在读硕士。

Abstract

Abstract:

The catalytic activity and selectivity of catalysts prepared by coprecipitation method with different precipitants, calcined temperature and the pretreatment condition with different content of Au and ZnO loading dispersed over nanoparticles TiO₂ for CO oxidation in H₂-rich gas was studied. The simulated material gas was used as reaction gas and the evaluation on catalytic activity of product was made through microreaction- chromatograph instrument. The catalyst was characterized by XRD and BET. The results show that the activity and selectivity of the catalysts are greatly changed with the variation of the ZnO loading, the kind of precipitant, calcination temperature and pretreatment condition; the catalyst Au(2%)/ZnO(2%) /TiO₂ with (NH₂)2CO as the precipitants, calcined at 300 ℃, pretreatment in H₂ and reaction temperature for 30℃ has optimal activity and selectivity.

Key words: Nano , Au/ZnO/TiO₂ catalyst , Hydrogen-rich gas , Selective oxidation 

摘要： 以纳米TiO2 为载体用共沉淀法负载不同含量Au和ZnO,研究了在不同沉淀剂、焙烧温度和活化条件下制备的催化剂对富氢气体中CO 转化率与选择性的影响。反应气采用模拟原料气,用微反-色谱联用装置对反应产物进行催化活性评价,用BET和XRD等方法对合成的催化剂进行表征。实验结果表明催化剂的活性与选择性受沉淀剂、焙烧温度、活化条件等制备因素综合影响。当催化剂组成为Au(2%)ZnO(2%)/TiO2,用尿素做沉淀剂、300℃空气焙烧,氢气条件下还原制备的催化剂在30℃时活性与选择性最佳。

关键词: 纳米 , Au/ZnO/TiO2 催化剂 , 富氢气体 , 选择性氧化

WANG Chao,XU Xin,LUO Guo-hua. Investigation on Slective Oxidation of CO in Hydrogen-Rich Gas for Nano Au/ZnO/TiO₂ Catalyst[J]. Journal of Petrochemical Universities, 2007, 20(1): 63-66.

王超, 徐新, 罗国华. 纳米Au/ZnO/TiO2 催化剂对富氢气体中CO选择性氧化[J]. 石油化工高等学校学报, 2007, 20(1): 63-66.

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Investigation on Slective Oxidation of CO in Hydrogen-Rich Gas for Nano Au/ZnO/TiO₂ Catalyst

纳米Au/ZnO/TiO2 催化剂对富氢气体中CO选择性氧化

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