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Title: Solar coal gasification reactor with pyrolysis gas recycle

Abstract

Coal (or other carbonaceous matter, such as biomass) is converted into a duct gas that is substantially free from hydrocarbons. The coal is fed into a solar reactor (10), and solar energy (20) is directed into the reactor onto coal char, creating a gasification front (16) and a pyrolysis front (12). A gasification zone (32) is produced well above the coal level within the reactor. A pyrolysis zone (34) is produced immediately above the coal level. Steam (18), injected into the reactor adjacent to the gasification zone (32), reacts with char to generate product gases. Solar energy supplies the energy for the endothermic steam-char reaction. The hot product gases (38) flow from the gasification zone (32) to the pyrolysis zone (34) to generate hot char. Gases (38) are withdrawn from the pyrolysis zone (34) and reinjected into the region of the reactor adjacent the gasification zone (32). This eliminates hydrocarbons in the gas by steam reformation on the hot char. The product gas (14) is withdrawn from a region of the reactor between the gasification zone (32) and the pyrolysis zone (34). The product gas will be free of tar and other hydrocarbons, and thus be suitable for use inmore » many processes.« less

Inventors:
 [1];  [2]
  1. Livermore, CA
  2. Morago, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
864784
Patent Number(s):
4415339
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
solar; coal; gasification; reactor; pyrolysis; gas; recycle; carbonaceous; matter; biomass; converted; duct; substantially; free; hydrocarbons; fed; 10; energy; 20; directed; char; creating; front; 16; 12; zone; 32; produced; level; 34; immediately; steam; 18; injected; adjacent; reacts; generate; product; gases; supplies; endothermic; steam-char; reaction; hot; 38; flow; withdrawn; reinjected; region; eliminates; reformation; 14; tar; suitable; processes; pyrolysis gas; hot product; gasification reactor; gasification zone; product gases; product gas; substantially free; solar energy; coal gasification; coal gas; pyrolysis zone; coal char; solar coal; hot char; gas recycle; carbonaceous matter; /48/126/

Citation Formats

Aiman, William R, and Gregg, David W. Solar coal gasification reactor with pyrolysis gas recycle. United States: N. p., 1983. Web.
Aiman, William R, & Gregg, David W. Solar coal gasification reactor with pyrolysis gas recycle. United States.
Aiman, William R, and Gregg, David W. Sat . "Solar coal gasification reactor with pyrolysis gas recycle". United States. https://www.osti.gov/servlets/purl/864784.
@article{osti_864784,
title = {Solar coal gasification reactor with pyrolysis gas recycle},
author = {Aiman, William R and Gregg, David W},
abstractNote = {Coal (or other carbonaceous matter, such as biomass) is converted into a duct gas that is substantially free from hydrocarbons. The coal is fed into a solar reactor (10), and solar energy (20) is directed into the reactor onto coal char, creating a gasification front (16) and a pyrolysis front (12). A gasification zone (32) is produced well above the coal level within the reactor. A pyrolysis zone (34) is produced immediately above the coal level. Steam (18), injected into the reactor adjacent to the gasification zone (32), reacts with char to generate product gases. Solar energy supplies the energy for the endothermic steam-char reaction. The hot product gases (38) flow from the gasification zone (32) to the pyrolysis zone (34) to generate hot char. Gases (38) are withdrawn from the pyrolysis zone (34) and reinjected into the region of the reactor adjacent the gasification zone (32). This eliminates hydrocarbons in the gas by steam reformation on the hot char. The product gas (14) is withdrawn from a region of the reactor between the gasification zone (32) and the pyrolysis zone (34). The product gas will be free of tar and other hydrocarbons, and thus be suitable for use in many processes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

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