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Title: ENHANCED HYDROGEN PRODUCTION INTEGRATED WITH CO2 SEPARATION IN A SINGLE-STAGE REACTOR

Abstract

The water gas shift reaction (WGSR) plays a major role in increasing the hydrogen production from fossil fuels. However, the enhanced hydrogen production is limited by thermodynamic constrains posed by equilibrium limitations of WGSR. This project aims at using a mesoporous, tailored, highly reactive calcium based sorbent system for incessantly removing the CO{sub 2} product which drives the equilibrium limited WGSR forward. In addition, a pure sequestration ready CO{sub 2} stream is produced simultaneously. A detailed project vision with the description of integration of this concept with an existing coal gasification process for hydrogen production is presented. Conceptual reactor designs for investigating the simultaneous water gas shift and the CaO carbonation reactions are presented. In addition, the options for conducting in-situ sorbent regeneration under vacuum or steam are also reported. Preliminary, water gas shift reactions using high temperature shift catalyst and without any sorbent confirmed the equilibrium limitation beyond 600 C demonstrating a carbon monoxide conversion of about 80%. From detailed thermodynamic analyses performed for fuel gas streams from typical gasifiers the optimal operating temperature range to prevent CaO hydration and to effect its carbonation is between 575-830 C.

Authors:
; ; ;
Publication Date:
Research Org.:
Ohio State University (US)
Sponsoring Org.:
(US)
OSTI Identifier:
838222
DOE Contract Number:  
FC26-03NT41853
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 10 Mar 2005
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 08 HYDROGEN; 29 ENERGY PLANNING, POLICY AND ECONOMY; CALCIUM; CARBON MONOXIDE; CATALYSTS; COAL GASIFICATION; FOSSIL FUELS; FUEL GAS; HYDRATION; HYDROGEN PRODUCTION; REGENERATION; STEAM; THERMODYNAMICS; WATER GAS

Citation Formats

Gupta, Himanshu, Iyer, Mahesh, Sakadjian, Bartev, and Fan, Liang-Shih. ENHANCED HYDROGEN PRODUCTION INTEGRATED WITH CO2 SEPARATION IN A SINGLE-STAGE REACTOR. United States: N. p., 2005. Web. doi:10.2172/838222.
Gupta, Himanshu, Iyer, Mahesh, Sakadjian, Bartev, & Fan, Liang-Shih. ENHANCED HYDROGEN PRODUCTION INTEGRATED WITH CO2 SEPARATION IN A SINGLE-STAGE REACTOR. United States. doi:10.2172/838222.
Gupta, Himanshu, Iyer, Mahesh, Sakadjian, Bartev, and Fan, Liang-Shih. Thu . "ENHANCED HYDROGEN PRODUCTION INTEGRATED WITH CO2 SEPARATION IN A SINGLE-STAGE REACTOR". United States. doi:10.2172/838222. https://www.osti.gov/servlets/purl/838222.
@article{osti_838222,
title = {ENHANCED HYDROGEN PRODUCTION INTEGRATED WITH CO2 SEPARATION IN A SINGLE-STAGE REACTOR},
author = {Gupta, Himanshu and Iyer, Mahesh and Sakadjian, Bartev and Fan, Liang-Shih},
abstractNote = {The water gas shift reaction (WGSR) plays a major role in increasing the hydrogen production from fossil fuels. However, the enhanced hydrogen production is limited by thermodynamic constrains posed by equilibrium limitations of WGSR. This project aims at using a mesoporous, tailored, highly reactive calcium based sorbent system for incessantly removing the CO{sub 2} product which drives the equilibrium limited WGSR forward. In addition, a pure sequestration ready CO{sub 2} stream is produced simultaneously. A detailed project vision with the description of integration of this concept with an existing coal gasification process for hydrogen production is presented. Conceptual reactor designs for investigating the simultaneous water gas shift and the CaO carbonation reactions are presented. In addition, the options for conducting in-situ sorbent regeneration under vacuum or steam are also reported. Preliminary, water gas shift reactions using high temperature shift catalyst and without any sorbent confirmed the equilibrium limitation beyond 600 C demonstrating a carbon monoxide conversion of about 80%. From detailed thermodynamic analyses performed for fuel gas streams from typical gasifiers the optimal operating temperature range to prevent CaO hydration and to effect its carbonation is between 575-830 C.},
doi = {10.2172/838222},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {3}
}