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Title: Carbon dioxide capture process with regenerable sorbents

Abstract

A process to remove carbon dioxide from a gas stream using a cross-flow, or a moving-bed reactor. In the reactor the gas contacts an active material that is an alkali-metal compound, such as an alkali-metal carbonate, alkali-metal oxide, or alkali-metal hydroxide; or in the alternative, an alkaline-earth metal compound, such as an alkaline-earth metal carbonate, alkaline-earth metal oxide, or alkaline-earth metal hydroxide. The active material can be used by itself or supported on a substrate of carbon, alumina, silica, titania or aluminosilicate. When the active material is an alkali-metal compound, the carbon-dioxide reacts with the metal compound to generate bicarbonate. When the active material is an alkaline-earth metal, the carbon dioxide reacts with the metal compound to generate carbonate. Spent sorbent containing the bicarbonate or carbonate is moved to a second reactor where it is heated or treated with a reducing agent such as, natural gas, methane, carbon monoxide hydrogen, or a synthesis gas comprising of a combination of carbon monoxide and hydrogen. The heat or reducing agent releases carbon dioxide gas and regenerates the active material for use as the sorbent material in the first reactor. New sorbent may be added to the regenerated sorbent prior to subsequent passesmore » in the carbon dioxide removal reactor.« less

Inventors:
 [1];  [2]
  1. (Bethel Park, PA)
  2. (Library, PA)
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
874425
Patent Number(s):
6387337
Application Number:
09/616,871
Assignee:
The United States of America as represented by the United States Department (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
carbon; dioxide; capture; process; regenerable; sorbents; remove; gas; stream; cross-flow; moving-bed; reactor; contacts; active; material; alkali-metal; compound; carbonate; oxide; hydroxide; alternative; alkaline-earth; metal; supported; substrate; alumina; silica; titania; aluminosilicate; carbon-dioxide; reacts; generate; bicarbonate; spent; sorbent; containing; moved; heated; treated; reducing; agent; natural; methane; monoxide; hydrogen; synthesis; comprising; combination; heat; releases; regenerates; added; regenerated; prior; subsequent; passes; removal; metal oxide; gas stream; carbon dioxide; carbon monoxide; synthesis gas; earth metal; reducing agent; bed reactor; metal compound; natural gas; metal carbonate; regenerable sorbent; gas contact; /423/422/

Citation Formats

Pennline, Henry W., and Hoffman, James S. Carbon dioxide capture process with regenerable sorbents. United States: N. p., 2002. Web.
Pennline, Henry W., & Hoffman, James S. Carbon dioxide capture process with regenerable sorbents. United States.
Pennline, Henry W., and Hoffman, James S. Tue . "Carbon dioxide capture process with regenerable sorbents". United States. https://www.osti.gov/servlets/purl/874425.
@article{osti_874425,
title = {Carbon dioxide capture process with regenerable sorbents},
author = {Pennline, Henry W. and Hoffman, James S.},
abstractNote = {A process to remove carbon dioxide from a gas stream using a cross-flow, or a moving-bed reactor. In the reactor the gas contacts an active material that is an alkali-metal compound, such as an alkali-metal carbonate, alkali-metal oxide, or alkali-metal hydroxide; or in the alternative, an alkaline-earth metal compound, such as an alkaline-earth metal carbonate, alkaline-earth metal oxide, or alkaline-earth metal hydroxide. The active material can be used by itself or supported on a substrate of carbon, alumina, silica, titania or aluminosilicate. When the active material is an alkali-metal compound, the carbon-dioxide reacts with the metal compound to generate bicarbonate. When the active material is an alkaline-earth metal, the carbon dioxide reacts with the metal compound to generate carbonate. Spent sorbent containing the bicarbonate or carbonate is moved to a second reactor where it is heated or treated with a reducing agent such as, natural gas, methane, carbon monoxide hydrogen, or a synthesis gas comprising of a combination of carbon monoxide and hydrogen. The heat or reducing agent releases carbon dioxide gas and regenerates the active material for use as the sorbent material in the first reactor. New sorbent may be added to the regenerated sorbent prior to subsequent passes in the carbon dioxide removal reactor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {5}
}

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