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Title: Solar coal-gasification reactor with pyrolysis-gas recycle. [Patent application]

Abstract

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 Gases are withdrawn from the pyrolysis zone and reinjected into the region of the reactor adjacent the gasification zone.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 The product gas is withdrawn from a region of the reactor between the gasification zone and the pyrolysis zone.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

Inventors:
;
Publication Date:
OSTI Identifier:
5322181
Application Number:
ON: DE82007306
Assignee:
Dept. of Energy
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 14 SOLAR ENERGY; COAL GASIFICATION; SOLAR PROCESS HEAT; CARBON MONOXIDE; CHARS; CHEMICAL COMPOSITION; CHEMICAL REACTORS; COAL; GASIFICATION; HYDROCARBONS; HYDROGEN; PYROLYSIS; PYROLYSIS PRODUCTS; RECYCLING; STEAM; STEAM REFORMER PROCESSES; SYNTHESIS GAS; CARBON COMPOUNDS; CARBON OXIDES; CARBONACEOUS MATERIALS; CHALCOGENIDES; CHEMICAL REACTIONS; DECOMPOSITION; ELEMENTS; ENERGY; ENERGY SOURCES; FLUIDS; FOSSIL FUELS; FUELS; GASES; HEAT; MATERIALS; NONMETALS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PROCESS HEAT; REFORMER PROCESSES; THERMOCHEMICAL PROCESSES; 010404* - Coal, Lignite, & Peat- Gasification; 140905

Citation Formats

Aiman, W. R., and Gregg, D. W. Solar coal-gasification reactor with pyrolysis-gas recycle. [Patent application]. United States: N. p., 1981. Web.
Aiman, W. R., & Gregg, D. W. Solar coal-gasification reactor with pyrolysis-gas recycle. [Patent application]. United States.
Aiman, W. R., and Gregg, D. W. Mon . "Solar coal-gasification reactor with pyrolysis-gas recycle. [Patent application]". United States. https://www.osti.gov/servlets/purl/5322181.
@article{osti_5322181,
title = {Solar coal-gasification reactor with pyrolysis-gas recycle. [Patent application]},
author = {Aiman, W. R. and Gregg, D. W.},
abstractNote = {Coal (or other carbonaceous matter, such as biomass) is converted into a product gas that is substantially free from hydrocarbons. The coal is fed into a solar reactor, and solar energy is directed into the reactor onto coal char, creating a gasification front and a pyrolysis front. A gasification zone is produced well above the coal level within the reactor. A pyrolysis zone is produced immediately above the coal level. Steam, injected into the reactor adjacent to the gasification zone, reacts with char to generate product gases. Solar energy supplies the energy for the endothermic steam-char reaction. The hot product gases flow from the gasification zone to the pyrolysis zone to generate hot char. Gases are withdrawn from the pyrolysis zone and reinjected into the region of the reactor adjacent the gasification zone. This eliminates hydrocarbons in the gas by steam reformation on the hot char. The product gas is withdrawn from a region of the reactor between the gasification zone and the pyrolysis zone. The product gas will be free of tar and other hydrocarbons, and thus be suitable for use in many processes.},
doi = {},
url = {https://www.osti.gov/biblio/5322181}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {4}
}