Cu-ZrO2-CeO2/γ-Al2O3催化甲醇水蒸气重整制氢反应的性能

doi:10.16085/j.issn.1000-6613.2017.01.028

摘要/Abstract

摘要： 以γ-Al₂O₃为载体，采用浸渍法制备Cu-ZrO₂-CeO₂/γ-Al₂O₃催化剂，用XRD、N₂吸附-脱附、H₂-TPR、NH₃-TPD、CO₂-TPD等方法对其进行表征。在连续流动常压固定床微型反应器上评价Cu-ZrO₂-CeO₂/γ-Al₂O₃催化剂对甲醇水蒸气重整制氢反应的催化性能，考察了反应温度、水醇比和质量空速对催化性能的影响，反应结果表明Cu-ZrO₂-CeO₂/γ-Al₂O₃催化剂具有较高的催化活性和稳定性，在温度为260℃、水醇摩尔比为1.2：1、质量空速为3.6h^-1的条件下，甲醇的转化率可达99%以上，氢气的选择性为98%以上，一氧化碳的选择性低于2.5%。表征结果显示助剂CeO₂和ZrO₂的加入促进活性组分在载体表面的分散性，影响催化剂的孔结构和酸碱性，增强了催化剂的活性。

关键词: 氧化铝, 催化剂载体, 选择性, 制氢

Abstract: Cu-ZrO₂-CeO₂/γ-Al₂O₃ catalysts were prepared by the impregnation method using γ-Al₂O₃ as the support. The catalysts were characterized by means of XRD,N₂ adsorption-desorption,H₂-TPR,CO₂-TPD,NH₃-TPD and BET. Hydrogen production by the steam reforming of methanol over the Cu-ZrO₂-CeO₂/γ-Al₂O₃ catalyst was studied in a fixed bed micro-reactor. The effects of reaction temperature,mole ratio of H₂O to methanol,WHSV on the catalytic performance and the stability of the catalysts were investigated. The experimental results showed that the methanol conversion rate reached 99%,the selectivity of hydrogen was 98%,while the selectivity of carbon monoxide was only 2.5% under the conditions of temperature 260℃,mole ratio of water to methanol of 1.2:1,and WHSV of 3.6h^-1. Characterization results showed that the addition of CeO₂ and ZrO₂ promoted the dispersion of the active component on the surface of the carrier,affected the pore structure and acidity of the catalysts,and increased their activity.

Key words: alumina, catalyst support, selectivity, hydrogen production

中图分类号:

TQ314

黄媛媛, 巢磊, 李工, 丁嘉, 郭剑桥. Cu-ZrO₂-CeO₂/γ-Al₂O₃催化甲醇水蒸气重整制氢反应的性能[J]. 化工进展, 2017, 36(01): 216-223.

HUANG Yuanyuan, CHAO Lei, LI Gong, DING Jia, GUO Jianqiao. Performance of Cu-ZrO₂-CeO₂/γ-Al₂O₃ catalysts for hydrogen production from steam reforming of methanol[J]. Chemical Industry and Engineering Progree, 2017, 36(01): 216-223.

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Cu-ZrO₂-CeO₂/γ-Al₂O₃催化甲醇水蒸气重整制氢反应的性能

Performance of Cu-ZrO₂-CeO₂/γ-Al₂O₃ catalysts for hydrogen production from steam reforming of methanol

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