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Steam reforming of methane under water deficient conditions over gadolinium-doped ceria

Paper ID Volume ID Publish Year Pages File Format Full-Text
47985 46487 2009 7 PDF Available
Title
Steam reforming of methane under water deficient conditions over gadolinium-doped ceria
Abstract

The catalytic properties of gadolinium-doped ceria (CGO) in methane steam reforming were studied. Catalytic tests were carried out between 750 and 900 °C, for H2O/CH4 ratios varying between 0.1 and 1, pretreated in H2O/N2, N2 and H2/N2. Above 800 °C, slight deactivation with time on stream was observed except for the H2-pretreated sample. Surface area measurements, O2 adsorption at room temperature and O2-temperature programmed oxidation experiments were performed after catalytic testing. Changes in both surface area and redox properties of CGO were observed and related to catalytic deactivation. Hydrogen is thought to play a key role in catalytic activity and deactivation process.

Keywords
Gadolinium-doped ceria; SOFC; Methane; Gradual internal steam reforming; Carbon deposition; Deactivation
First Page Preview
Steam reforming of methane under water deficient conditions over gadolinium-doped ceria
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 88, Issues 3–4, 20 May 2009, Pages 361–367
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis