物理化学学报 >> 2011, Vol. 27 >> Issue (09): 2185-2190.doi: 10.3866/PKU.WHXB20110824

催化和表面科学 上一篇    下一篇

Pd促进ZnO/Al2O3催化乙醇水蒸气重整制氢

陈孟楠1,2, 章冬云1,3, THOMPSON Levi T.2, 马紫峰1   

  1. 1. 上海交通大学化学工程系, 上海 200240;
    2. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI,48109, USA;
    3. 上海应用技术学院材料科学与工程系, 上海 201418
  • 收稿日期:2011-03-29 修回日期:2011-05-12 发布日期:2011-08-26
  • 通讯作者: 马紫峰 E-mail:zfma@sjtu.edu.cn
  • 基金资助:

    国家重点基础研究发展计划项目(973) (2007CB209705)资助

Hydrogen Production from Steam Reforming of Ethanol over Pd Promoted ZnO/Al2O3 Catalysts

CHEN Meng-Nan1,2, ZHANG Dong-Yun1,3, THOMPSON Levi T.2, MA Zi-Feng1   

  1. 1. Department of Chemical Engineering, Shanghai JiaoTong University, Shanghai 200240, P. R. China;
    2. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA;
    3. Department of Material Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
  • Received:2011-03-29 Revised:2011-05-12 Published:2011-08-26
  • Contact: MA Zi-Feng E-mail:zfma@sjtu.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2007CB209705).

摘要: 采用浸渍法制备了Pd 促进ZnO/Al2O3 催化剂, 考察了该催化剂作用时, 在水醇摩尔比为3, 常压和450 °C工作条件下乙醇水蒸气重整(SRE)制氢反应性能. 研究结果表明, 在该催化剂体系作用下的SRE反应过程中, H2、CH3CHO为主要产物, 与ZnO/Al2O3催化剂不同, Pd能促使CH3CHO发生C-C键断裂反应, 显著提高C2H5OH转化率及H2选择性, 分别达65%、55%. 还利用BET比表面积、透射电子显微镜(TEM)、热重-差示扫描量热-质谱(TG-DSC-MS)等表征手段考察了催化剂失活以及表面积炭情况, 发现Pd的加入对催化剂总积炭量并无明显影响.

关键词: 乙醇, 制氢, 钯, 氧化锌, 三氧化二铝

Abstract: Pd promoted ZnO/Al2O3 catalysts were prepared by impregnation method. The hydrogen production performance upon the steam reforming of ethanol (SRE) over the prepared catalysts was evaluated with n(H2O):n(C2H5OH) of 3:1 at 450 °C and atmospheric pressure. The results show that H2 and CH3CHO were the main products during the SRE reaction over the prepared catalysts. Different from the ZnO/Al2O3 catalysts, the Pd promoted ZnO/Al2O3 catalysts favored C-C scission during the SRE and thus a higher C2H5OH conversion of 65% and a H2 selectivity of 55% were obtained over the prepared Pd promoted catalysts. BET, transmission electron microscopy (TEM), and thermogravimetry-differential scanning calorimetry-mass spectrometry (TG-DSC-MS) coupling techniques were used to analyze the coking behavior on the catalyst surface. We found that Pd promotion does not prevent the formation of coke on the ZnO/Al2O3 catalysts.

Key words: Ethanol, Hydrogen production, Palladium, Zinc oxide, Alumina

MSC2000: 

  • O643