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Title: Integrated High Temperature Coal-to-Hydrogen System with CO2 Separation

Abstract

A significant barrier to the commercialization of coal-to-hydrogen technologies is high capital cost. The purity requirements for H{sub 2} fuels are generally met by using a series of unit clean-up operations for residual CO removal, sulfur removal, CO{sub 2} removal and final gas polishing to achieve pure H{sub 2}. A substantial reduction in cost can be attained by reducing the number of process operations for H{sub 2} cleanup, and process efficiency can be increased by conducting syngas cleanup at higher temperatures. The objective of this program was to develop the scientific basis for a single high-temperature syngas-cleanup module to produce a pure stream of H{sub 2} from a coal-based system. The approach was to evaluate the feasibility of a 'one box' process that combines a shift reactor with a high-temperature CO{sub 2}-selective membrane to convert CO to CO{sub 2}, remove sulfur compounds, and remove CO{sub 2} in a simple, compact, fully integrated system. A system-level design was produced for a shift reactor that incorporates a high-temperature membrane. The membrane performance targets were determined. System level benefits were evaluated for a coal-to-hydrogen system that would incorporate membranes with properties that would meet the performance targets. The scientific basis for high temperaturemore » CO{sub 2}-selective membranes was evaluated by developing and validating a model for high temperature surface flow membranes. Synthesis approaches were pursued for producing membranes that integrated control of pore size with materials adsorption properties. Room temperature reverse-selectivity for CO{sub 2} was observed and performance at higher temperatures was evaluated. Implications for future membrane development are discussed.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
General Electric Company Incorporation
Sponsoring Org.:
USDOE
OSTI Identifier:
924436
DOE Contract Number:  
FC26-05NT42451
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 08 HYDROGEN; COAL GASIFICATION; HYDROGEN PRODUCTION; CARBON DIOXIDE; REMOVAL; SYNTHESIS GAS; HOT GAS CLEANUP; CARBON MONOXIDE; DESULFURIZATION; SHIFT PROCESSES; MEMBRANES; PERFORMANCE

Citation Formats

James A. Ruud, Anthony Ku, Vidya Ramaswamy, Wei Wei, and Patrick Willson. Integrated High Temperature Coal-to-Hydrogen System with CO2 Separation. United States: N. p., 2007. Web. doi:10.2172/924436.
James A. Ruud, Anthony Ku, Vidya Ramaswamy, Wei Wei, & Patrick Willson. Integrated High Temperature Coal-to-Hydrogen System with CO2 Separation. United States. doi:10.2172/924436.
James A. Ruud, Anthony Ku, Vidya Ramaswamy, Wei Wei, and Patrick Willson. Thu . "Integrated High Temperature Coal-to-Hydrogen System with CO2 Separation". United States. doi:10.2172/924436. https://www.osti.gov/servlets/purl/924436.
@article{osti_924436,
title = {Integrated High Temperature Coal-to-Hydrogen System with CO2 Separation},
author = {James A. Ruud and Anthony Ku and Vidya Ramaswamy and Wei Wei and Patrick Willson},
abstractNote = {A significant barrier to the commercialization of coal-to-hydrogen technologies is high capital cost. The purity requirements for H{sub 2} fuels are generally met by using a series of unit clean-up operations for residual CO removal, sulfur removal, CO{sub 2} removal and final gas polishing to achieve pure H{sub 2}. A substantial reduction in cost can be attained by reducing the number of process operations for H{sub 2} cleanup, and process efficiency can be increased by conducting syngas cleanup at higher temperatures. The objective of this program was to develop the scientific basis for a single high-temperature syngas-cleanup module to produce a pure stream of H{sub 2} from a coal-based system. The approach was to evaluate the feasibility of a 'one box' process that combines a shift reactor with a high-temperature CO{sub 2}-selective membrane to convert CO to CO{sub 2}, remove sulfur compounds, and remove CO{sub 2} in a simple, compact, fully integrated system. A system-level design was produced for a shift reactor that incorporates a high-temperature membrane. The membrane performance targets were determined. System level benefits were evaluated for a coal-to-hydrogen system that would incorporate membranes with properties that would meet the performance targets. The scientific basis for high temperature CO{sub 2}-selective membranes was evaluated by developing and validating a model for high temperature surface flow membranes. Synthesis approaches were pursued for producing membranes that integrated control of pore size with materials adsorption properties. Room temperature reverse-selectivity for CO{sub 2} was observed and performance at higher temperatures was evaluated. Implications for future membrane development are discussed.},
doi = {10.2172/924436},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 31 00:00:00 EDT 2007},
month = {Thu May 31 00:00:00 EDT 2007}
}

Technical Report:

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