Maximizing H-2 production by combined partial oxidation of CH4 and water gas shift reaction

Citation
Ps. Maiya et al., Maximizing H-2 production by combined partial oxidation of CH4 and water gas shift reaction, APP CATAL A, 196(1), 2000, pp. 65-72
Citations number
18
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
APPLIED CATALYSIS A-GENERAL
ISSN journal
0926860X → ACNP
Volume
196
Issue
1
Year of publication
2000
Pages
65 - 72
Database
ISI
SICI code
0926-860X(20000327)196:1<65:MHPBCP>2.0.ZU;2-D
Abstract
A dense ceramic membrane reactor has been constructed to exclusively transp ort oxygen for the partial oxidation of methane (CH4) to syngas (a mixture of CO and H-2) at temperatures of 850-900 degrees C. H-2 production is enha nced in a second catalytic reactor through the water gas shift reaction, in which the CO reacts with steam that is injected into the reactor at a cont rolled rate to produce CO2 and H-2. Experiments and thermodynamic calculati ons were used to establish the optimal lower temperature (approximate to 40 0 degrees C) and lower steam-to-CO ratio (approximate to 2) to achieve ther modynamic efficiency while maximizing H-2 production. No unusual synergisms were observed by the combination of the two processes and the experimental results are in good agreement with thermodynamic predictions. (C) 2000 Els evier Science B.V. All rights reserved.