High-purity hydrogen via the sorption-enhanced steam methane reforming reaction over a synthetic CaO-based sorbent and a Ni catalyst M. Broda a , V. Manovic b , Q. Imtiaz a , A. M. Kierzkowska a , E. J. Anthony c , C. R. Müller a a Laboratory of Energy Science and Engineering, ETH Zurich, Leonhardstrasse 27, 8092 Zurich, Switzerland b CanmetENERGY, Natural Resources Canada, 1 Haanel Drive, Ottawa K1A 1M1, Canada c School of Applied Science, Cranfield University, Bedfordshire MK43 0AL, England Laboratory of Energy Science and Engineering 2nd September 2013
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High-purity hydrogen via the sorption-enhanced steam
methane reforming reaction over a synthetic CaO-based
sorbent and a Ni catalyst
M. Brodaa, V. Manovicb, Q. Imtiaza, A. M. Kierzkowskaa, E. J. Anthonyc, C. R. Müllera
aLaboratory of Energy Science and Engineering, ETH Zurich, Leonhardstrasse 27, 8092 Zurich, SwitzerlandbCanmetENERGY, Natural Resources Canada, 1 Haanel Drive, Ottawa K1A 1M1, Canada
cSchool of Applied Science, Cranfield University, Bedfordshire MK43 0AL, England
Laboratory of Energy Science and Engineering2nd September 2013
Introduction
2nd September 2013 2Laboratory of Energy Science and Engineering
Global H2 production
(~50 Mt/yr, 2008)
Global H2 use
P. Zakkour and G. Cook, CCS industry roadmap-high purity CO2 sources: final draft sectoral assessment, Carbon Counts, UK, 2010.
3Laboratory of Energy Science and Engineering2nd September 2013
Reforming reaction:
CH4 + H2O CO + 3H2 Ho25 ºC= + 206 kJ/mol
Water-gas-shift reaction:
CO + H2O CO2 + H2 Ho25 ºC= - 41 kJ/mol
Steam methane reforming accounts for ~50 % of the global
hydrogen production
Disadvantages:
• Highly endothermic
• High operating temperatures → catalyst sintering and coke formation
• Overall process is complex and comprises several unit operations
• Further purification steps are required to produce high-purity hydrogen,
e.g. preferential oxidation (PROX)
M. Balat, Possible method for hydrogen production, energy spurces, part A: recovery, utilization, and environmental effect, 2008,
31, 39-50.
4Laboratory of Energy Science and Engineering2nd September 2013