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Ni/CaO‐Al2O3 bifunctional catalysts for sorption‐enhanced steam methane reforming

Ni/CaO‐Al2O3 bifunctional catalysts for sorption‐enhanced steam methane reforming Ni/CaO‐Al2O3 bifunctional catalysts with different CaO/Al2O3 mass ratios were prepared by a sol–gel method and applied to the sorption‐enhanced steam methane reforming (SESMR) process. The catalysts consisted mainly of Ni, CaO and Ca5Al6O14. The catalyst structure depended strongly on the CaO/Al2O3 mass ratio, which in turn affected the CO2 capture capacity and the catalytic performance. The catalyst with a CaO/Al2O3 mass ratio of 6 or 8 possessed the highest surface area, the smallest Ni particle size, and the most uniform distribution of Ni, CaO, and Ca5Al6O14. During 50 consecutive SESMR cycles at a steam/methane molar ratio of 2, the thermodynamic equilibrium was achieved using the catalyst with a CaO/Al2O3 mass ratio of 6, and H2 concentration profiles for all the 50 cycles almost overlapped, indicating excellent activity and stability of the catalyst. Moreover, a high CO2 capture capacity of 0.44 gCO2/gcat was maintained after 50 carbonation–calcination cycles, being almost equal to its initial capacity (0.45 gCO2/gcat). © 2014 American Institute of Chemical Engineers AIChE J, 60: 3547–3556, 2014 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aiche Journal Wiley

Ni/CaO‐Al2O3 bifunctional catalysts for sorption‐enhanced steam methane reforming

Xu, Pan; Zhou, Zhiming; Zhao, Changjun; Cheng, Zhenmin
Aiche Journal , Volume 60 (10) – Oct 1, 2014
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References (68)

Publisher
Wiley
Copyright
© 2014 American Institute of Chemical Engineers
ISSN
0001-1541
eISSN
1547-5905
DOI
10.1002/aic.14543
Publisher site
See Article on Publisher Site

Abstract

Ni/CaO‐Al2O3 bifunctional catalysts with different CaO/Al2O3 mass ratios were prepared by a sol–gel method and applied to the sorption‐enhanced steam methane reforming (SESMR) process. The catalysts consisted mainly of Ni, CaO and Ca5Al6O14. The catalyst structure depended strongly on the CaO/Al2O3 mass ratio, which in turn affected the CO2 capture capacity and the catalytic performance. The catalyst with a CaO/Al2O3 mass ratio of 6 or 8 possessed the highest surface area, the smallest Ni particle size, and the most uniform distribution of Ni, CaO, and Ca5Al6O14. During 50 consecutive SESMR cycles at a steam/methane molar ratio of 2, the thermodynamic equilibrium was achieved using the catalyst with a CaO/Al2O3 mass ratio of 6, and H2 concentration profiles for all the 50 cycles almost overlapped, indicating excellent activity and stability of the catalyst. Moreover, a high CO2 capture capacity of 0.44 gCO2/gcat was maintained after 50 carbonation–calcination cycles, being almost equal to its initial capacity (0.45 gCO2/gcat). © 2014 American Institute of Chemical Engineers AIChE J, 60: 3547–3556, 2014

Journal

Aiche Journal – Wiley

Published: Oct 1, 2014

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