Water gas shift reaction (WGSR) is an important chemical process for enhancing the conversion of the syngas carbon monoxide contents into hydrogen by means of steam, in coal gasification power plants integrated with Carbon Capture and Storage (CCS) technologies. This paper concerns an experimental investigation and numerical simulation on carbon monoxide conversion and hydrogen generation from WGSR using a small scale experimental apparatus. The laboratory test rig is based on two packed-bed catalytic reactors in series to be operated at different temperatures. It has been designed for testing WGSR processes using different catalysts, at varying syngas temperatures (from 350 to 500 °C for the high temperature reactor and from 180 to 250 °C for the low temperature reactor) and initial syngas compositions (up to 100% of dry CO fraction). The system has been instrumented for temperature, flow rate and gas composition measurements, and can operate both in a two-stage or in a single-stage mode. This paper investigates the performance of the WGSR affected by various and important parameters, like catalyst type (Fe/Cr or Pt/Al for high temperature and Cu/Zn or Pt/Al for low temperature), residence time of reactants in the catalyst bed, reaction temperature and H2O/CO ratio. The experimental results are supported by numerical analyses, based on equilibrium and kinetic models for the WGSR simulations.
Experimental investigation and numerical simulation of CO to CO2 conversion and hydrogen production from water gas shift reaction,
CAU, GIORGIO;
2009-01-01
Abstract
Water gas shift reaction (WGSR) is an important chemical process for enhancing the conversion of the syngas carbon monoxide contents into hydrogen by means of steam, in coal gasification power plants integrated with Carbon Capture and Storage (CCS) technologies. This paper concerns an experimental investigation and numerical simulation on carbon monoxide conversion and hydrogen generation from WGSR using a small scale experimental apparatus. The laboratory test rig is based on two packed-bed catalytic reactors in series to be operated at different temperatures. It has been designed for testing WGSR processes using different catalysts, at varying syngas temperatures (from 350 to 500 °C for the high temperature reactor and from 180 to 250 °C for the low temperature reactor) and initial syngas compositions (up to 100% of dry CO fraction). The system has been instrumented for temperature, flow rate and gas composition measurements, and can operate both in a two-stage or in a single-stage mode. This paper investigates the performance of the WGSR affected by various and important parameters, like catalyst type (Fe/Cr or Pt/Al for high temperature and Cu/Zn or Pt/Al for low temperature), residence time of reactants in the catalyst bed, reaction temperature and H2O/CO ratio. The experimental results are supported by numerical analyses, based on equilibrium and kinetic models for the WGSR simulations.
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