CO2 reforming of methane over supported LaNiO3 perovskite-type oxides

被引：160
|
作者：
Rabelo-Neto, R. C. [1 ]
Sales, H. B. E. [2 ]
Inocencio, C. V. M. [1 ]
Varga, E. [3 ]
Oszko, A. [3 ]
Erdohelyi, A. [3 ]
Noronha, F. B. [1 ]
Mattos, L. V. [2 ]
机构：
[1] Inst Nacl Tecnol, Av Venezuela 82, BR-20081312 Rio De Janeiro, Brazil
[2] Univ Fed Fluminense, Rua Passo Patria 156, BR-24210240 Niteroi, RJ, Brazil
[3] Univ Szeged, Dept Phys Chem & Mat Sci, Aradi Vertanuk Tere 1, H-6720 Szeged, Hungary
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2018年 / 221卷
关键词：
CO2 reforming of methane; Biogas; LaNiO3/CeSiO2; catalyst; Hydrogen production; CARBON-DIOXIDE; SYNTHESIS GAS; HYDROGEN-PRODUCTION; NI/LA2O3; CATALYST; PARTIAL OXIDATION; NICKEL-CATALYSTS; CH4; PERFORMANCE; ETHANOL; OXYGEN;
D O I：
10.1016/j.apcatb.2017.09.022
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：
This work investigated the performance of supported LaNiO3 perovskite-type oxides for the CO2 reforming of methane. The methane and CO2 conversion increased at the beginning of reaction for LaNiO3 and LaNiO3/Al2O3 catalysts. On the other hand, conversion remained quite constant for LaNiO3/CeSiO2. in situ XPS experiments under reaction conditions revealed that the metallic Ni particles were oxidized by CO2 from the feed for LaNiO3 and LaNiO3/Al2O3 catalysts. Ceria support was preferentially oxidized, limiting the oxidation of the metallic phase. Raman spectroscopy and thermogravimetric analysis showed that carbon was formed mainly over LaNiO3 and LaNiO3/Al2O3 catalysts. Supporting LaNiO3 over CeSiO2 almost completely suppressed carbon deposition. in situ XPS experiments showed a continuous change of ceria oxidation states between Ce4+ and Ce3+ under reaction conditions. This result in a high oxygen mobility of ceria support that reacts with carbon, inhibiting the formation of nickel carbide and consequently the nucleation and growth of carbon filaments.
引用
收藏
页码：349 / 361
页数：13
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