The effects of partial substitution of Ni by Zn in LaNiO3 perovskite catalyst for methane dry reforming

被引：97
作者：
Moradi, G. R. [1 ]
Rahmanzadeh, M. [1 ]
Khosravian, F. [1 ]
机构：
[1] Razi Univ, Fac Engn, Dept Chem Engn, Catalyst Res Ctr, Kermanshah, Iran
来源：
JOURNAL OF CO2 UTILIZATION | 2014年 / 6卷
关键词：
Perovskite; Dry reforming; Promoter; LaNiO3; LaNi1-xZnxO3; CARBON-DIOXIDE; PARTIAL OXIDATION; SYNTHESIS GAS; SUPPORTED RHODIUM; NICKEL-CATALYSTS; DEPOSITION; CH4; CO2; COMBUSTION; PRECURSOR;
D O I：
10.1016/j.jcou.2014.02.001
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of LaNi1-xZnxO3 (x = 0.2, 0.4, 0.6, 0.8 and 1.0) perovskite-type oxides were synthesized via sol-gel related method by using propionic acid as solvent. The reaction was performed under continuous flow of feed stream which included CO2, CH4 and helium as diluting agent, under atmospheric pressure. The prepared catalysts were characterized by X-ray diffraction (XRD) and temperature-programmed reduction (TPR). The results showed that the conversion rates of CO2 and CH4 increased as Ni was partially substituted by Zn. Considering the mentioned rates, among these catalysts, LaNi0.8Zn0.2O3 was the most effective catalyst. TPR results showed that partial substitution of Ni by Zn increased the temperatures of reduction peaks, leading to the more stable perovskite structure compared to LaNiO3 structure. It indicates that Zn stabilizes the perovskite structure. Also, TGA results showed that LaNi0.8Zn0.2O3 was more resistant to coke formation in comparison with LaNiO3 during 75 h time on stream stability test. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：7 / 11
页数：5
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