高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (10): 1822.doi: 10.7503/cjcu20170158

• 物理化学 • 上一篇    下一篇

CeO2改性Cu/Zn-Al水滑石衍生催化剂对甲醇水蒸气重整制氢性能的影响

贺建平1, 张磊1(), 陈琳2, 杨占旭1(), 佟宇飞1   

  1. 1. 辽宁石油化工大学化学化工与环境学部, 抚顺 113001
    2. 营口理工学院化学与材料工程系, 营口 115014
  • 收稿日期:2017-03-20 出版日期:2017-10-10 发布日期:2017-09-22
  • 作者简介:联系人简介: 张 磊, 男, 博士, 副教授, 主要从事催化新材料及催化反应过程的研究. E-mail:lnpuzhanglei@163.com;杨占旭, 男, 博士, 副教授, 主要从事催化新材料及催化反应过程的研究. E-mail:zhanxuy@126.com
  • 基金资助:
    国家自然科学基金(批准号: 21671092, 21376237)和辽宁省博士科研启动基金(批准号: 201601322)资助

Effect of CeO2 on Cu/Zn-Al Catalysts Derived from Hydrotalcite Precursor for Methanol Steam Reforming

HE Jianping1, ZHANG Lei1,*(), CHEN Lin2, YANG Zhanxu1,*(), TONG Yufei1   

  1. 1. College of Chemistry, Chemical Engineering and Environmental Engineering,Liaoning Shihua University, Fushun 113001, China
    2. Department of Chemistry and Materials Engineering, Yingkou Institute of Technology, Yingkou 115014, China
  • Received:2017-03-20 Online:2017-10-10 Published:2017-09-22
  • Contact: ZHANG Lei,YANG Zhanxu E-mail:lnpuzhanglei@163.com;zhanxuy@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21671092, 21376237) and the Doctoral Scientific Research Foundation of Liaoning Province, China(No.201601322)

摘要:

采用原位合成法在γ-Al2O3表面合成了锌铝水滑石, 再采用顺次浸渍法制备了Ce/Cu/Zn-Al催化材料; 将其应用于甲醇水蒸气重整制氢, 探讨了Ce含量对Cu/Zn-Al催化剂催化性能的影响. 催化剂表征结果表明, CeO2的引入改善了活性组分铜的分散度、 铜的比表面积以及催化剂的氧化还原性质, 进而提高了催化剂的催化活性和产氢率. 当Ce含量为4%时, 催化剂活性最佳, 在250 ℃时, 甲醇转化率达到100%, CO摩尔分数为0.39%, 与Cu/Zn-Al催化剂相比, 甲醇转化率提高了近40%.

关键词: 二氧化铈, 甲醇水蒸气重整, 水滑石, 氢气

Abstract:

ZnAl-LDHs was synthesized on γ-Al2O3 by in situ synthesis method. Moreover, the Ce/Cu/Zn-Al catalysts were prepared by ordinal wet impregnation method and applied to methanol steam reforming. The effect of cerium content on Cu/Zn-Al catalysts was discussed for methanol steam reforming. The catalysts were studied by XRD, SEM, H2-TPR, N2 adsorption techniques and chemisorption N2O. The results showed that the addition of CeO2 improved the copper dispersion, copper surface area and catalyst reducibility. The catalytic activity and hydrogen production rate was also promoted thereby. When the Ce content was 4%, the catalyst exhibited the best catalytic activity, that was, the methanol conversion was 100% and the molar fraction of CO was 0.39% at 250 ℃ in hydrogen production by methanol steam reforming. Compared to the Cu/ZnAl catalyst, the methanol conversion increased by almost 40%.

Key words: CeO2, Methanol steam reforming, Hydrotalcite, Hydrogen

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