Partial oxidation of sulfur-containing solid carbonaceous fuel

Patent · Tue Jan 31 00:00:00 EST 1989

OSTI ID:6022964

Najjar, M S; Corbeels, R J

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
• Resource Relation: Patent File Date: Filed date 2 Mar 1987
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL FINES
PARTIAL OXIDATION PROCESSES
CALCIUM SULFIDES
CARBON DIOXIDE
CARBON MONOXIDE
CARBONACEOUS MATERIALS
CHEMICAL REACTORS
COAL PREPARATION
DESULFURIZATION
HYDROGEN
IRON SILICATES
SULFUR CONTENT
WATER
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HYDROGEN COMPOUNDS
IRON COMPOUNDS
MATERIALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
SILICATES
SILICON COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
010402* - Coal
Lignite
& Peat- Purification & Upgrading