Role of Pr on Ni-Mg-Al Mixed Oxides Synthesized by Microwave-Assisted Self-Combustion for Dry Reforming of Methane

被引：32
作者：
Ojeda-Nino, Oscar H. [1 ]
Gracia, Francisco [2 ]
Daza, Carlos [1 ]
机构：
[1] Univ Nacl Colombia, Fac Ciencias, Dept Quim, Estado Solido & Catalisis Ambiental, AK 30 45-03, Bogota, Colombia
[2] Univ Chile, Fac Ciencias Fis & Matemat, Dept Ingn Quim Biotecnol & Mat, Lab Catalisis & Energia, Av Beauchef 851, Santiago, Chile
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2019年 / 58卷 / 19期
关键词：
HYDROTALCITE-DERIVED CATALYSTS; TAR MODEL-COMPOUND; PROMOTED NI; SYNGAS PRODUCTION; LOW-TEMPERATURE; CO2; CAPTURE; CARBON-DIOXIDE; CE; LA; PRECURSORS;
D O I：
10.1021/acs.iecr.9b00557
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Pr (1-12% wt) promoted Ni-Mg-Al mixed oxides were synthesized by the microwave-assisted self-combustion method. The promoting role of Pr on the physical and chemical properties and the catalytic performance in dry reforming of methane (DRM) were studied. Several techniques were used to evaluate the chemical composition and the thermal, structural, reductive, basic, textural, and morphological properties of the oxides. Catalytic stability tests in DRM at 600 degrees C after reduction in reactant flow at 700 degrees C were performed. The increase in the Pr load promotes the reduction of Ni, enhances the thermal stability of the basic sites and the CO2-capture capacity at high temperature, and decreases the Ni-0 particle sizes. Pr does not affect the conversion, but it improves the stability in correlation with the thermal stability of basic sites and Ni-0 particle sizes. The 6% wt Pr-promoted catalyst showed the best performance among all the samples studied.
引用
收藏
页码：7909 / 7921
页数：13
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