Ethanol reforming over Ni/CeGd catalysts with low Ni content

被引：34

作者：

Augusto, Bruno L. ^{[1
,2
]}

Costa, Lidia O. O. ^{[2
]}

Noronha, Fabio B. ^{[2
]}

Colman, Rita C. ^{[1
]}

Mattos, Lisiane V. ^{[1
]}

机构：

[1] Univ Fed Fluminense, BR-24210240 Niteroi, RJ, Brazil

[2] INT, BR-20081312 Rio De Janeiro, Brazil

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 17期

关键词：

SOFC; Ethanol; Steam reforming; Ethanol decomposition; Partial oxidation; Ni/CeGd anodes; OXIDE FUEL-CELL; HYDROGEN-PRODUCTION; PARTIAL OXIDATION; H-2; PRODUCTION; STEAM; ANODE; PERFORMANCE; METHANE; NI/YSZ; SOFCS;

D O I：

10.1016/j.ijhydene.2012.05.127

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：

The catalytic performance of Ni/CeGd SOFC anodes with low Ni content (18%wt) prepared by a hydrothermal method for ethanol conversion reactions was evaluated. Calcination temperature and reaction conditions significantly affected the activity and stability of the samples. Increasing calcination temperature decreased ethanol conversion. This was likely due to the larger CeGd crystallite size. All samples deactivated during reaction under pure ethanol at 773 K. The addition of water or oxygen to the feed and the increase of reaction temperature improved catalyst stability. Scanning electron microscopy and thermogravimetric analysis showed that the deactivation was due to carbon formation. In the presence of oxygen or water, the mechanism of carbon removal was favored. Moreover, carbon formation was not favored at high reaction temperature due to the reverse of the Boudouard reaction as well as the promoting effect of the support on the carbon gasification reaction. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：12258 / 12270

页数：13

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