Partial oxidation of sulfur-containing solid carbonaceous fuel

Patent · Tue Jan 31 04:00:00 EST 1989

OSTI ID:6213842

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, basis solid fuel, 0.2 to 6.0 wt. % sulfur and 0.1 to 30 wt. % of silicate compounds including iron silicate. The improvements consist of (1) 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 first and second types of supplemental calcium-containing material with a controlled amount of free-oxygen containing gas and 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 less than about 10/sup -9/ atmospheres; (2) cooling and cleaning the hot raw effluent gas mixture from (1) by contacting the effluent gas mixture with a liquid hydrocarbonaceous fuel cooling and scrubbing agent, thereby producing a slurry comprising slag and calcium sulfide in liquid hydrocarbonaceous fuel, (3) steam stripping the slurry and separating a gaseous mixture comprising steam and H/sub 2/S; and (4) recycling the sulfur-depleted slurry to the front end of the process for use in preparation of fresh feed mixture to the partial oxidation gas generator.

• Assignee: Texaco, Inc., White Plains, NY
• Patent Number(s): US 4801438
• OSTI ID: 6213842
• Country of Publication: United States
• Language: English

Related Subjects

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