The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1984
Filed:
Mar. 22, 1982
Gerald Moss, Wantage, GB;
Exxon Research and Engineering Co., Florham Park, NJ (US);
Abstract
Fuel is passed (via line 13) to a fluidized fuel conversion bed (21) containing reactive CaO and CaSO.sub.4 at a fuel-oxidation temperature (e.g. 730.degree. 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 (via 33) to a fluidized decarbonation bed (34) operated at a temperature (e.g. 850.degree. 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 (6). The decarbonation bed (34) 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 (line 37) to an oxidation bed (36) 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.