Down-flow moving-bed gasifier with catalyst recycle

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872254

Halow, John S ^[1]

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1. Waynesburg, PA

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-76
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5895508
• OSTI ID: 872254
• Country of Publication: United States
• Language: English

Related Subjects

down-flow
moving-bed
gasifier
catalyst
recycle
gasification
coal
carbonaceous
materials
endothermic
reaction
achieved
presence
removed
ash
sufficiently
heated
riser
burner
combustion
residual
carbon
volatilize
volatilized
returned
uniformly
contacts
condenses
material
hot
gaseous
products
resulting
excess
air
introduced
providing
heat
energy
gaseous combustion
hot gaseous
products resulting
gasification reaction
endothermic reaction
carbonaceous materials
heat energy
combustion products
carbonaceous material
hot gas
combustion product
sufficiently heated
residual carbon
excess air
catalyst recycle
moving-bed gasifier
bed gasifier
/48/502/