An integrated catalytic approach for the production of hydrogen by glycerol reforming coupled with water-gas shift

A thermodynamic analysis for the process concept of hydrogen production based on the combination of the water gas shift (WGS) and CO2 capture reactions (Absorption Enhanced Water Gas Shift, SEWGS) is presented. The chemical equilibrium analysis of this reaction system was performed to select the proper CO2 absorbent among: calcined dolomite (CaOMgO), Li4SiO4 and Na2ZrO3 to be used in the process. Results indicate that the use of Na2ZrO3 produced the highest hydrogen concentration among absorbents studied. Results also revealed that the maximum hydrogen concentration (97% mol) can be achieved with a feed molar ratio of CO/Na2ZrO3/H2/O = 1/1/2 at 500°C at atmospheric conditions. The use of a catalyst for such processes may not be needed, since the high temperature at which these reactions are proposed may promote homogeneous non-catalyzed reactions. However, if the combination of both reaction kinetics (WGS and carbonation) are not fast enough to reach equilibrium, a new non-conventional WGS catalyst may be needed.

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Enhancing the production of hydrogen via water–gas shift reaction using Pd-based membrane reactors

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2010.07.159 ◽

2010 ◽

Vol 35 (22) ◽

pp. 12596-12608 ◽

Cited By ~ 96

Author(s):

Diogo Mendes ◽

Vânia Chibante ◽

Ju-Meng Zheng ◽

Silvano Tosti ◽

Fabio Borgognoni ◽

...

Keyword(s):

Membrane Reactors ◽

Water Gas Shift ◽

Water Gas Shift Reaction ◽

Production Of Hydrogen ◽

Shift Reaction ◽

Water Gas

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Development of a new bi-functional steam reforming/water-gas shift catalyst for production of hydrogen in a membrane reactor

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2016.01.123 ◽

2016 ◽

Vol 41 (24) ◽

pp. 10335-10345 ◽

Cited By ~ 9

Author(s):

Y. Sun ◽

M. Grigore ◽

S.S. Hla ◽

L.D. Morpeth ◽

J.H. Edwards

Keyword(s):

Steam Reforming ◽

Membrane Reactor ◽

Water Gas Shift ◽

Production Of Hydrogen ◽

Water Gas ◽

Shift Catalyst

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Novel Catalytic Systems for Hydrogen Production via the Water-Gas Shift Reaction

Conference Papers in Energy ◽

10.1155/2013/426980 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8

Author(s):

Klito C. Petallidou ◽

Kyriaki Polychronopoulou ◽

Angelos M. Efstathiou

Keyword(s):

Surface Acidity ◽

Acid Sites ◽

Water Gas Shift ◽

Lower Amount ◽

Mixed Metal Oxide ◽

Oxide Supports ◽

Mixed Metal ◽

Wgs Reaction ◽

Production Of Hydrogen ◽

Water Gas

The present work reports on the development of new catalysts for the production of hydrogen via the water-gas shift (WGS) reaction. In particular, the effect of Ce/La atom ratio on the catalytic performance of 0.5 wt% Pt supported on Ce1−xLaxO2−δ (x=0.0,0.2,0.5,0.8,1.0) mixed metal oxides for the WGS reaction was investigated. It was found that the addition of 20 at.% La3+ in CeO2 lattice increased significantly the catalytic activity and stability of 0.5 wt% Pt/Ce0.8La0.2O2−δ solid. More precisely, a lower amount of “carbon” was accumulated on the catalyst surface, whereas surface acidity and basicity studies showed that Ce0.8La0.2O2−δ had the highest concentration of labile oxygen and acid sites, and the lowest concentration of basic sites compared to the other Ce1−xLaxO2−δ mixed metal oxide supports (x=0.2,0.5,0.8).

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