Imperial College London
Alternate

Prof Klaus Hellgardt

Faculty of Engineering, Department of Chemical Engineering

Professor of Chemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 5577k.hellgardt

 
 
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Location

 

417AACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Iruretagoyena:2018:10.1016/j.ijhydene.2018.01.043,
author = {Iruretagoyena, Ferrer D and Hellgardt, K and Chadwick, D},
doi = {10.1016/j.ijhydene.2018.01.043},
journal = {International Journal of Hydrogen Energy},
pages = {4211--4222},
title = {Towards autothermal hydrogen production by sorption-enhanced water gas shift and methanol reforming: a thermodynamic analysis},
url = {http://dx.doi.org/10.1016/j.ijhydene.2018.01.043},
volume = {43},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Hydrogen production by the water gas shift reaction (WGS) is equilibrium limited. In the current study, we demonstrate that the overall efficiency of the WGS can be improved by co-feeding methanol and removing CO2 in situ. The thermodynamics of the water gas shift and methanol reforming/WGS (methanol-to-shift, MtoS) reactions for H2 production alone and with simultaneous CO2 adsorption (sorption-enhanced, SEWGS and SEMtoS) were studied using a non-stoichiometric approach based on the minimisation of the Gibbs free energy. A typical composition of the effluent from a steam methane reformer was used for the shift section. The effects of temperature (450–750 K), pressure (5–30 barg), steam and methanol addition, fraction of CO2 adsorption (0–95%) and energy efficiency of the shift systems have been investigated. Adding methanol to the feed facilitates autothermal operation of the shift unit, with and without CO2 removal, and enhances significantly the amount of H2 produced. For a set methanol and CO input, the MtoS and SEMtoS systems show a maximum productivity of H2 between 523 and 593 K due to the increasing limitation of the exothermic shift reaction while the endothermic methanol steam reforming is no longer limited above 593 K. The heat of adsorption of CO2 was found to make only a small difference to the H2 production or the autothermal conditions.
AU  - Iruretagoyena,Ferrer D
AU  - Hellgardt,K
AU  - Chadwick,D
DO  - 10.1016/j.ijhydene.2018.01.043
EP  - 4222
PY  - 2018///
SN  - 0360-3199
SP  - 4211
TI  - Towards autothermal hydrogen production by sorption-enhanced water gas shift and methanol reforming: a thermodynamic analysis
T2  - International Journal of Hydrogen Energy
UR  - http://dx.doi.org/10.1016/j.ijhydene.2018.01.043
UR  - http://hdl.handle.net/10044/1/56948
VL  - 43
ER  -
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