Process for producing CO/sub 2/, and CO/sub 2/ so produced
Patent
·
OSTI ID:7078077
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.
- Assignee:
- Exxon Research and Engineering Co.
- Patent Number(s):
- US 4431622
- OSTI ID:
- 7078077
- Country of Publication:
- United States
- Language:
- English
Similar Records
Converting a fuel to combustible gas
Low pollution method of burning fuels
Influence of periodically changing oxidizing and reducing environment on sulfur capture under PFBC conditions
Patent
·
Mon Apr 01 23:00:00 EST 1985
·
OSTI ID:5293407
Low pollution method of burning fuels
Patent
·
Mon Mar 05 23:00:00 EST 1984
·
OSTI ID:6649292
Influence of periodically changing oxidizing and reducing environment on sulfur capture under PFBC conditions
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:355820
Related Subjects
090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SULFIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
DECARBONIZATION
DESULFURIZATION
DISPLACEMENT FLUIDS
ENERGY RECOVERY
FLUIDIZED BED
FLUIDS
FUELS
HEAT RECOVERY
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PRODUCTION
RECOVERY
RECYCLING
REDUCTION
SULFIDES
SULFUR COMPOUNDS
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
10 SYNTHETIC FUELS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SULFIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
DECARBONIZATION
DESULFURIZATION
DISPLACEMENT FLUIDS
ENERGY RECOVERY
FLUIDIZED BED
FLUIDS
FUELS
HEAT RECOVERY
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PRODUCTION
RECOVERY
RECYCLING
REDUCTION
SULFIDES
SULFUR COMPOUNDS
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION