Autothermal reforming of methane over Pt/ZrO2/AI2O3 catalysts

被引：116
|
作者：
Souza, MMVM
Schmal, M
机构：
[1] Univ Fed Rio de Janeiro, COPPE, PEQ, NUCAT, BR-21945970 Rio De Janeiro, Brazil
[2] Univ Fed Rio de Janeiro, Escola Quim, BR-21940900 Rio De Janeiro, Brazil
来源：
APPLIED CATALYSIS A-GENERAL | 2005年 / 281卷 / 1-2期
关键词：
methane; steam reforming; partiat oxidation; autothermal reforming; Pt/ZrO2/Al2O3; catalysts;
D O I：
10.1016/j.apcata.2004.11.007
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：
Autothermal reforming of methane, combining steam reforming and partial oxidation was carried out with Pt/Al2O3, Pt/ZrO2 and Pt/ZrO2/ Al2O3 catalysts, in the temperature range of 400-900 degrees C. The PUZrO2/Al2O3 catalyst was found to be the most active and stable at 800 degrees C due to the higher resistance to coke formation. The reaction occurs in two simultaneous stages: total combustion of methane and reforming of the unconverted methane with steam and CO2, with the O-2 conversion of 100 % starting from 450 degrees C. The addition of O-2 to the feed increases methane conversion and the catalyst stability, decreasing the H-2 and CO yields due to the enhancement of methane combustion. By manipulating the O-2/CH4 ratio of the feed it is possible to achieve the H-2/CO ratio that is optimal to the GTL processes. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：19 / 24
页数：6
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