Effect of calcium dopant on catalysis of Ir/La2O3 for hydrogen production by oxidative steam reforming of glycerol

被引：29

作者：

Yang, Guangxing ^{[1
]}

Yu, Hao ^{[1
]}

Huang, Xiaoya ^{[1
]}

Peng, Feng ^{[1
]}

Wang, Hongjuan ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2012年 / 127卷

基金：

国家高技术研究发展计划(863计划);

关键词：

Iridium; La2O2Co3; Reforming; Glycerol; Calcium; NICKEL-CATALYSTS; SYNTHESIS GAS; NI/AL2O3; CATALYSTS; FILAMENTOUS CARBON; RENEWABLE HYDROGEN; METHANE; ETHANOL; CONVERSION; REACTIVITY; STABILITY;

D O I：

10.1016/j.apcatb.2012.08.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The superfluous glycerol derived from biodiesel production can be a low-cost feedstock for hydrogen production via reforming technology. In this work, a La2O3 supported iridium catalyst was employed to catalyze the oxidative steam reforming of glycerol (OSRG) for hydrogen production, in the range of S/C ratio of 1-3,C/O ratio of 0.75-1 and 550-750 degrees C. The catalyst was modified with Na, Mg and Ca to optimize the catalytic performance in OSRG reaction. It was found that Ca is promising in promoting Ir/La2O3 catalyst for OSRG, offering excellent activity, hydrogen selectivity and stability. By combining multiple techniques, i.e. XRD, FTIR, Raman, XPS, H-2-TPR, CO2-TPD and HRTEM, the Ca modified Ir/La2O3 catalyst was characterized to understand the role of Ca promoter. Multi-functions of Ca were demonstrated, including inducing structural defects of La2O2CO3, endowing the catalyst strong basicity and tuning the metal-support interaction, which make the catalyst highly resistant to coking and sintering, therefore performing excellent long-term stability for 100 h. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：89 / 98

页数：10

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