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 (basis solid fuel) 0.2 to 0.6 wt. % sulfur and 0.1 to 30 wt. % of silicate compounds including iron silicate the improvement comprising: (1) reacting in the reaction zone of a partial oxidation gas generator a feed mixture comprising the solid carbonaceous fuel and copper-containing material with a controlled amount of free-oxygen containing gas, H/sub 2/O, and optionally a temperature moderator so that an equilibrium oxygen concentration is provided in the gas phase in the reaction zone with a partial pressure which is greater than about 10/sup -6/ atmosphere, the O/C atomic ratio is in the a range of about 0.5 to 2.0, the H/sub 2/O/solid carbonaceous fuel weight ratio is in the range of about 0.2 to 0.7, the total moles of copper in the reaction zone is at least equal to about 1.0 times the moles of sulfur in the solid carbonaceous fuel, about 70 to 98 wt. % of the carbon in the solid carbonaceous fuel is converted into carbon oxides thereby producing a raw product gas mixture comprising H/sub 2/, CO, CO/sub 2/, less than about 0.05 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 copper oxysulfide when the partial oxidation and desulfurization reactions take place at a temperature which is 10/sup 0/ to 200/sup 0/F. below the softening temperature of the ash in the solid fuel and below about 2000/sup 0/F, and a pressure in the range of about 2 to 250 atmospheres, or entrained molten slag when the partial oxidation and desulfurization reactions take place in the slagging mode at a temperature in the range of above about 2000/sup 0/F to 2900/sup 0/F and above the softening temperature of the ash in the solid fuel.
- Assignee:
- Texaco, Inc., White Plains, NY
- Patent Number(s):
- US 4774021
- OSTI ID:
- 6474804
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COMMINUTION
COPPER
DESULFURIZATION
ELEMENTS
MATERIALS
METALS
OXYGEN COMPOUNDS
PARTIAL OXIDATION PROCESSES
SILICATES
SILICON COMPOUNDS
SULFUR CONTENT
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE