Actions for High Purity Hydrogen Production with In-Situ Carbon Dioxide and Sulfur Capture in a Single Stage Reactor [electronic resource].

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High Purity Hydrogen Production with In-Situ Carbon Dioxide and Sulfur Capture in a Single Stage Reactor [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2011.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Ohio State University, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Enhancement in the production of high purity hydrogen (H₂) from fuel gas, obtained from coal gasification, is limited by thermodynamics of the water gas shift (WGS) reaction. However, this constraint can be overcome by conducting the WGS in the presence of a CO₂-acceptor. The continuous removal of CO₂ from the reaction mixture helps to drive the equilibrium-limited WGS reaction forward. Since calcium oxide (CaO) exhibits high CO₂ capture capacity as compared to other sorbents, it is an ideal candidate for such a technique. The Calcium Looping Process (CLP) developed at The Ohio State University (OSU) utilizes the above concept to enable high purity H₂ production from synthesis gas (syngas) derived from coal gasification. The CLP integrates the WGS reaction with insitu CO₂, sulfur and halide removal at high temperatures while eliminating the need for a WGS catalyst, thus reducing the overall footprint of the hydrogen production process. The CLP comprises three reactors - the carbonator, where the thermodynamic constraint of the WGS reaction is overcome by the constant removal of CO₂ product and high purity H₂ is produced with contaminant removal; the calciner, where the calcium sorbent is regenerated and a sequestration-ready CO₂ stream is produced; and the hydrator, where the calcined sorbent is reactivated to improve its recyclability. As a part of this project, the CLP was extensively investigated by performing experiments at lab-, bench- and subpilot-scale setups. A comprehensive techno-economic analysis was also conducted to determine the feasibility of the CLP at commercial scale. This report provides a detailed account of all the results obtained during the project period.
Report Numbers
E 1.99:1037873
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Note
Published through SciTech Connect.
07/31/2011.
Liang-Shih Fan; Nihar Phalak; Shwetha Ramkumar; Daniel Connell; Zhenchao Sun; Fu-Chen Yu; Niranjani Deshpande; Robert Statnick.
Type of Report and Period Covered Note
Final;
Funding Information
FC26-07NT43059
View MARC record | catkey: 13831570