skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

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:
;
Issue Date:
Research Org.:
The Ohio State University Research Foundation, Columbus, OH (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1224892
Patent Number(s):
9,174,844
Application Number:
13/892,681
Assignee:
The Ohio State University Research Foundation
DOE Contract Number:  
FC26-03NT41853
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 May 13
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

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., 2015. 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. Wed . "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/1224892.
@article{osti_1224892,
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 = {2015},
month = {11}
}

Patent:

Save / Share:

Works referenced in this record:

Novel CO2 Absorbents Using Lithium-Containing Oxide
journal, November 2005

  • Kato, Masahiro; Nakagawa, Kazuaki; Essaki, Kenji
  • International Journal of Applied Ceramic Technology, Vol. 2, Issue 6, p. 467-475
  • DOI: 10.1111/j.1744-7402.2005.02047.x