A study on the modification of mesoporous mixed oxides supports for dry reforming of methane by Pt or Ru

被引：46

作者：

Carvalho, Davi C. ^{[1
]}

de Souza, Helvio Silvester A. ^{[1
]}

Filho, Josue M. ^{[2
]}

Oliveira, Alcemira C. ^{[2
]}

Campos, Adriana ^{[3
]}

Milet, Edwin R. C. ^{[3
]}

de Sousa, Francisco F. ^{[4
]}

Padron-Hernandez, E. ^{[5
]}

Oliveira, Alcineia C. ^{[1
]}

机构：

[1] Univ Fed Ceara, Campus Pici Bloco 940, Fortaleza, Ceara, Brazil

[2] Univ Fed Ceara, Dept Fis, Fortaleza, Ceara, Brazil

[3] CETENE, Recife, PE, Brazil

[4] Fed Univ Para, BR-68505080 Maraba, PA, Brazil

[5] Univ Fed Pernambuco, Dept Fis, CCEN, BR-50670901 Recife, PE, Brazil

来源：

APPLIED CATALYSIS A-GENERAL | 2014年 / 473卷

关键词：

Mesoporous support; Dry reforming; Pt/CeO2-Al2O3; catalyst; Raman spectroscopy; Oxides; SYNTHESIS GAS-PRODUCTION; CATALYTIC PERFORMANCE; PARTIAL OXIDATION; DEACTIVATION BEHAVIOR; NI; NICKEL; CERIA; CO; ALPHA-AL2O3; CONVERSION;

D O I：

10.1016/j.apcata.2013.12.031

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：

Mesoporous mixed oxides supports were impregnated with solutions of Pt or Ru compounds. The catalytic performance and stability were evaluated in dry reforming of methane. The catalysts were characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, temperature programmed reduction (TPR), High-resolution transmission electron microscopy (HRTEM) and Transmission electron microscopy (TEM) analyses and Raman spectroscopy. Promoters such as MgO, ZrO2, CeO2 and La2O3 were added to alumina support and exhibited distinct behaviour, when Ru or Pt was dispersed on these solids. Catalysts based on Pt-containing CeO2 Al2O3 showed a relatively high catalytic activity and stability compared to the other solids. The influences of the temperature and CH4/CO2 on the catalytic behaviour of the most active solids were also studied. The coking takes place due to carbonaceous deposition, but no significant loss of activity was observed during 24 h for some catalysts, which suggest the carbon species formed did not damage the solid. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：132 / 145

页数：14

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