物理化学学报 >> 2008, Vol. 24 >> Issue (10): 1875-1878.doi: 10.3866/PKU.WHXB20081023

研究论文 上一篇    下一篇

NaA分子筛膜催化剂上CO和C2H4混合气的选择性氧化反应

钟依均; 许晓华; 肖强; 姜丽; 朱伟东; 马淳安   

  1. 浙江工业大学化学工程与材料科学学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032; 浙江师范大学物理化学研究所, 浙江省固体表面反应化学重点实验室, 浙江 金华 321004
  • 收稿日期:2008-05-20 修回日期:2008-06-23 发布日期:2008-10-08
  • 通讯作者: 钟依均 E-mail:yjzhong@zjnu.cn

Selective Oxidation of Carbon Monoxide and Ethene Mixture on Zeolite NaA Membranes Coated Catalysts

ZHONG Yi-Jun; XU Xiao-Hua; XIAO Qiang; JIANG Li; ZHU Wei-Dong; MA Chun-An   

  1. State Key Laboratory for Breeding Base of Green Chemistry and Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, P. R. China; Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang Province, P. R. China
  • Received:2008-05-20 Revised:2008-06-23 Published:2008-10-08
  • Contact: MA Chun-An E-mail:yjzhong@zjnu.cn

摘要: 采用二次水热法, 在Pt/Al2O3球形催化剂颗粒上合成了致密的NaA分子筛膜. 分别以X射线衍射(XRD)和扫描电子显微镜(SEM)对制备的分子筛膜催化剂结构及形貌进行表征, 结果显示经二次合成的Pt/Al2O3球形催化剂颗粒上均匀地覆盖一层致密、均一的NaA分子筛膜, 膜的厚度约为20 滋m. 将合成的NaA分子筛膜催化剂用于CO和C2H4混合气氧化反应, 考察了催化剂表面分子筛膜对反应物分子的选择性, 在最优条件下, CO对C2H4的氧化反应选择性始终维持在96%. 这种复合膜催化剂可用于选择性除去C2H4原料气中的CO.

关键词: NaA分子筛, 膜催化剂, 选择性氧化, 一氧化碳, 乙烯

Abstract: Defect-free zeolite NaA membranes were coated onto the surface of spherical Pt/Al2O3 particles using a two-step hydrothermal method. The structure and morphology of the synthesized composite catalysts were characterized using XRD and SEM techniques, respectively. The results indicated a layer of compact and uniform NaA molecular sieve membrane with a thickness of about 20 滋m was coated on the spherical Pt/Al2O3 particles after the two-step hydrothermal synthesis. The prepared NaA membrane coated catalysts were used in the oxidation of a mixture of CO and C2H4 to study the reactant selectivity over the coated zeolite NaA membranes. Under the optimized conditions, the oxidation selectivity for CO over C2H4 on the composite catalyst was as high as 96%. The feasible application of this composite membrane coated catalyst to the selective removal of CO in the presence of C2H4 was anticipated.

Key words: Zeolite NaA, Membrane catalyst, Selective oxidation, Carbon monoxide, C2H4

MSC2000: 

  • O643