Down-flow moving-bed gasifier with catalyst recycle

Patent · Tue Apr 20 00:00:00 EDT 1999

OSTI ID:350320

Halow, J S

The gasification of coal and other carbonaceous materials by an endothermic gasification reaction is achieved in the presence of a catalyst in a down-flow, moving-bed gasifier. Catalyst is removed along with ash from the gasifier and is then sufficiently heated in a riser/burner by the combustion of residual carbon in the ash to volatilize the catalyst. This volatilized catalyst is returned to the gasifier where it uniformly contacts and condenses on the carbonaceous material. Also, the hot gaseous combustion products resulting from the combustion of the carbon in the ash along with excess air are introduced into the gasifier for providing heat energy used in the endothermic reaction. 1 fig.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5,895,508/A/
• Application Number: PAN: 8-694,575
• OSTI ID: 350320
• Resource Relation: Other Information: PBD: 20 Apr 1999
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL GASIFICATION
GAS GENERATORS
CATALYSTS
MATERIALS RECOVERY
ASHES
EVAPORATION
WASTE HEAT UTILIZATION
PROCESS HEAT
REGENERATION