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H2 Production and CO2 Separation

  • Antonello Di Donato
Chapter
Part of the Green Energy and Technology book series (GREEN)

Abstract

A promising technology for H2 production and CO2 separation is based on water gas shift reaction operated in water gas shift membrane reactor (WGSMR). In such a reactor the synthetic gas reacts with steam in a catalytic bed to produce additional hydrogen and CO2. A H2 selective membrane allows the simultaneous production of hydrogen at a high purity level and a stream of concentrated CO2. The performance of such a reactor is defined in terms of CO conversion fraction, H2 recovered fraction and produced H2 flow rate. The chapter deals with the modelling of a WGSMR. A model developed to assist the design of a pilot scale, tube-in-tube reactor, is described. Simulations with the model are presented and discussed. The simulations were performed to analyse the effect of operating conditions (H2O/CO ratio, temperature, pressure and syngas flow rate), catalyst characteristics (catalytic bed efficiency, void fraction) and membrane length, on the reactor performance. The results provide quantitative information to define the set of conditions to obtain the target value of the H2 flow rate, with high values of CO conversion fraction and H2 recovered fraction, minimising the length of the H2 selective membrane. A last paragraph is dedicated to a short analysis of the main issues and foreseen solutions for the industrial application of the technology.

Keywords

Void Fraction Membrane Reactor Pressure Swing Adsorption Reactor Configuration Conversion Fraction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notation

CSS

CO2 capture and storage

IGCC

Integrated gasification combined cycle

PSA

Pressure swing adsorption

TSA

Temperature swing adsorption

WGS

Water gas shift reaction

WGSMR

Water gas shift membrane reactor

Notes

Acknowledgments

I am grateful to Michele De Santis, Enrico Malfa, Stefano Martelli, Patrizia Miceli and Ali Smith for revisions and corrections. My special thanks to Paolo Granati for discussions and suggestions.

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Copyright information

© Springer-Verlag London Limited 2011

Authors and Affiliations

  1. 1.Centro Sviluppo Materiali, S.p.ARomeItaly

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