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Title: Down-flow moving-bed gasifier with catalyst recycle

Abstract

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.

Inventors:
 [1]
  1. Waynesburg, PA
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
872254
Patent Number(s):
5895508
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10K - PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Halow, John S. Down-flow moving-bed gasifier with catalyst recycle. United States: N. p., 1999. Web.
Halow, John S. Down-flow moving-bed gasifier with catalyst recycle. United States.
Halow, John S. Fri . "Down-flow moving-bed gasifier with catalyst recycle". United States. https://www.osti.gov/servlets/purl/872254.
@article{osti_872254,
title = {Down-flow moving-bed gasifier with catalyst recycle},
author = {Halow, John S},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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