Removal of sulfur compounds in fluidized bed carbonaceous solids gasification

Patent · Tue Sep 19 00:00:00 EDT 1989

OSTI ID:5342379

Patel, J G

This patent describes a process for gasifying sulfur containing carbonaceous feed solids in a single bed maintained fluidized by fluidizing gas introduced through a perforated sloping bed support grid within a single gasification reactor having a density/size selective solids withdrawal conduit at a base portion of the bed with upflowing withdrawal gas. It comprises: introducing sulfur containing carbonaceous feed solids susceptible to gasification and sulfur fixation agent particulates into the single fluidized bed; gasifying the sulfur containing carbonaceous feed solids in the fluidized bed producing ash and product gas forming a reducing region in a major portion of the single fluidized bed; reacting the gaseous sulfur compounds with oxides of the sulfur fixation agent in the reducing region of the single fluidized bed to form an intermediate solid metallic sulfur compound; reacting the intermediate solid metallic sulfur compound in an oxidizing region to form a stable, particulate, environmentally acceptable sulfur-containing compound; withdrawing from a headspace of the single gasification reactor product gas from which the gaseous sulfur compounds have been substantially removed; and withdrawing the ash and the stable, particulate, environmentally acceptable sulfur-containing compound from the single fluidized bed through the selective solids withdrawal conduit.

• Assignee: Institute of Gas Technology, Chicago, IL
• Patent Number(s): US 4867756
• Application Number: PPN: US 7080792A
• OSTI ID: 5342379
• Resource Relation: Patent File Date: 3 Aug 1987
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
DESULFURIZATION
CHEMICAL REACTORS
COAL GASIFICATION
COAL PREPARATION
FLUIDIZED BEDS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
MATERIALS
THERMOCHEMICAL PROCESSES
010402* - Coal
Lignite
& Peat- Purification & Upgrading
010404 - Coal
Lignite
& Peat- Gasification