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Title: Process for producing CO/sub 2/, and CO/sub 2/ so produced

Abstract

Fuel is passed to a fluidized fuel conversion bed containing reactive CaO and CaSo/sub 4/ at a fuel-oxidation temperature (e.g. 730/sup 0/ C.) below the temperature at which CaO reacts with CO/sub 2/ to form CaCO/sub 3/. The bed is fluidized by an inerts-free gas containing hydrogen (and/or a source thereof, e.g. steam) and fuel is therein partially oxidized, CaSO/sub 4/ being reduced to CaS. CO/sub 2/ thus formed is fixed as CaCO/sub 3/, and bed solids containing CaS and CaCO/sub 3/ pass to a fluidized decarbonation bed operated at a temperature (e.g. 850/sup 0/C.) above the decarbonation temperature of CaCO/sub 3/ whereby CO/sub 2/ is liberated and is recovered after passage through a heat recovery device. Decarbonation bed is preferably fluidized by the gas products from the fuel conversion which reduce CaSO/sub 4/ therein to CaS and form additional CO/sub 2/. Bed solids containing CaS and CaO pass to an oxidation bed fluidized with air to convert CaS to CaSO/sub 4/ with much heat liberation. Hot bed solids are returned to the decarbonation and fuel conversion beds to furnish heat and CaSO/sub 4/ to maintain the reactions therein.

Inventors:
Publication Date:
OSTI Identifier:
7078077
Patent Number(s):
US 4431622
Assignee:
Exxon Research and Engineering Co.
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 24 Mar 1981, United Kingdom of Great Britain and Northern Ireland (UK); Other Information: PAT-APPL-360412
Country of Publication:
United States
Language:
English
Subject:
10 SYNTHETIC FUELS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CALCIUM CARBONATES; DECARBONIZATION; CALCIUM OXIDES; FLUIDIZED BED; CALCIUM SULFIDES; CARBON DIOXIDE; PRODUCTION; RECYCLING; DESULFURIZATION; DISPLACEMENT FLUIDS; FUELS; HEAT RECOVERY; OXIDATION; REDUCTION; WASTE HEAT UTILIZATION; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CARBONATES; CHALCOGENIDES; CHEMICAL REACTIONS; ENERGY RECOVERY; FLUIDS; OXIDES; OXYGEN COMPOUNDS; RECOVERY; SULFIDES; SULFUR COMPOUNDS; WASTE PRODUCT UTILIZATION; 090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989); 320303 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Equipment & Processes

Citation Formats

Moss, G. Process for producing CO/sub 2/, and CO/sub 2/ so produced. United States: N. p., 1984. Web.
Moss, G. Process for producing CO/sub 2/, and CO/sub 2/ so produced. United States.
Moss, G. 1984. "Process for producing CO/sub 2/, and CO/sub 2/ so produced". United States.
@article{osti_7078077,
title = {Process for producing CO/sub 2/, and CO/sub 2/ so produced},
author = {Moss, G},
abstractNote = {Fuel is passed to a fluidized fuel conversion bed containing reactive CaO and CaSo/sub 4/ at a fuel-oxidation temperature (e.g. 730/sup 0/ C.) below the temperature at which CaO reacts with CO/sub 2/ to form CaCO/sub 3/. The bed is fluidized by an inerts-free gas containing hydrogen (and/or a source thereof, e.g. steam) and fuel is therein partially oxidized, CaSO/sub 4/ being reduced to CaS. CO/sub 2/ thus formed is fixed as CaCO/sub 3/, and bed solids containing CaS and CaCO/sub 3/ pass to a fluidized decarbonation bed operated at a temperature (e.g. 850/sup 0/C.) above the decarbonation temperature of CaCO/sub 3/ whereby CO/sub 2/ is liberated and is recovered after passage through a heat recovery device. Decarbonation bed is preferably fluidized by the gas products from the fuel conversion which reduce CaSO/sub 4/ therein to CaS and form additional CO/sub 2/. Bed solids containing CaS and CaO pass to an oxidation bed fluidized with air to convert CaS to CaSO/sub 4/ with much heat liberation. Hot bed solids are returned to the decarbonation and fuel conversion beds to furnish heat and CaSO/sub 4/ to maintain the reactions therein.},
doi = {},
url = {https://www.osti.gov/biblio/7078077}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 14 00:00:00 EST 1984},
month = {Tue Feb 14 00:00:00 EST 1984}
}