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Title: Calcium looping process for high purity hydrogen production integrated with capture of carbon dioxide, sulfur and halides

Abstract

A process for producing hydrogen comprising the steps of: (i) gasifying a fuel into a raw synthesis gas comprising CO, hydrogen, steam, sulfur and halide contaminants in the form of H.sub.2S, COS, and HX, wherein X is a halide; (ii) passing the raw synthesis gas through a water gas shift reactor (WGSR) into which CaO and steam are injected, the CaO reacting with the shifted gas to remove CO.sub.2, sulfur and halides in a solid-phase calcium-containing product comprising CaCO.sub.3, CaS and CaX.sub.2; (iii) separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and (iv) regenerating the CaO by calcining the solid-phase calcium-containing product at a condition selected from the group consisting of: in the presence of steam, in the presence of CO.sub.2, in the presence of synthesis gas, in the presence of H.sub.2 and O.sub.2, under partial vacuum, and combinations thereof.

Inventors:
;
Publication Date:
Research Org.:
The Ohio State University Research Foundation (Columbus, OH)
Sponsoring Org.:
USDOE
OSTI Identifier:
1088984
Patent Number(s):
8,496,909
Application Number:
13/123,746
Assignee:
The Ohio State University Research Foundation (Columbus, OH) NETL
DOE Contract Number:  
FC26-03NT41853
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ramkumar, Shwetha, and Fan, Liang-Shih. Calcium looping process for high purity hydrogen production integrated with capture of carbon dioxide, sulfur and halides. United States: N. p., 2013. Web.
Ramkumar, Shwetha, & Fan, Liang-Shih. Calcium looping process for high purity hydrogen production integrated with capture of carbon dioxide, sulfur and halides. United States.
Ramkumar, Shwetha, and Fan, Liang-Shih. Tue . "Calcium looping process for high purity hydrogen production integrated with capture of carbon dioxide, sulfur and halides". United States. https://www.osti.gov/servlets/purl/1088984.
@article{osti_1088984,
title = {Calcium looping process for high purity hydrogen production integrated with capture of carbon dioxide, sulfur and halides},
author = {Ramkumar, Shwetha and Fan, Liang-Shih},
abstractNote = {A process for producing hydrogen comprising the steps of: (i) gasifying a fuel into a raw synthesis gas comprising CO, hydrogen, steam, sulfur and halide contaminants in the form of H.sub.2S, COS, and HX, wherein X is a halide; (ii) passing the raw synthesis gas through a water gas shift reactor (WGSR) into which CaO and steam are injected, the CaO reacting with the shifted gas to remove CO.sub.2, sulfur and halides in a solid-phase calcium-containing product comprising CaCO.sub.3, CaS and CaX.sub.2; (iii) separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and (iv) regenerating the CaO by calcining the solid-phase calcium-containing product at a condition selected from the group consisting of: in the presence of steam, in the presence of CO.sub.2, in the presence of synthesis gas, in the presence of H.sub.2 and O.sub.2, under partial vacuum, and combinations thereof.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {7}
}

Patent:

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