Partial oxidation of sulfur-containing solid carbonaceous fuel
This patent describes a process for the simultaneous partial oxidation and desulfurization of a sulfur and silicate-containing comminuted solid carbonaceous fuel comprising, 0.2 to 6.0 wt. % sulfur and 0.1 to 30 wt. % of silicate compounds including iron silicate the improvement comprising reacting in the free-flow unobstructed down-flowing vertical refractory lined reaction zone of a partial oxidation gas generator a feed mixture comprising the solid carbonaceous fuel and supplemental calcium-containing material with a controlled amount of free-oxygen containing gas an a temperature moderator. An equilibrium oxygen concentration is provided in the gas phase in the reaction zone with a partial pressure which is less than about 10/sup -12/ atmosphere, the O/C atomic ratio is in the range of about 0.3 to 1.1, the H/sub 2/O/solid carbonaceous fuel weight ratio is in the range of about 0.03 to 0.70, the total moles of calcium in the reaction zone is at least equal to about 1.0 times the moles of sulfur in the solid carbonaceous fuel, and about 70 to 98 wt. % of the carbon in the solid carbonaceous fuel is converted into carbon oxides. A hot raw product gas is produced comprising H/sub 2/, CO, CO/sub 2/, less than about 0.005-mole % of H/sub 2/S and COS, at least one gas selected from the group consisting of H/sub 2/O, N/sub 2/, CH/sub 4/ and A, and entrained fly-ash in admixture with calcium sulfide.
- Assignee:
- Texaco, Inc., White Plains, NY
- Patent Number(s):
- US 4801440
- OSTI ID:
- 6022964
- Country of Publication:
- United States
- Language:
- English
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Partial oxidation of sulfur-containing solid carbonaceous fuel
Partial oxidation of sulfur-containing solid carbonaceous fuel
Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL FINES
COAL PREPARATION
DESULFURIZATION
ELEMENTS
HYDROGEN
HYDROGEN COMPOUNDS
IRON COMPOUNDS
IRON SILICATES
MATERIALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTIAL OXIDATION PROCESSES
SILICATES
SILICON COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
WATER