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Title: Hydropyrolysis process

Abstract

An improved process for producing a methane-enriched gas wherein a hydrogen-deficient carbonaceous material is treated with a hydrogen-containing pyrolysis gas at an elevated temperature and pressure to produce a product gas mixture including methane, carbon monoxide and hydrogen. The improvement comprises passing the product gas mixture sequentially through a water-gas shift reaction zone and a gas separation zone to provide separate gas streams of methane and of a recycle gas comprising hydrogen, carbon monoxide and methane for recycle to the process. A controlled amount of steam also is provided which when combined with the recycle gas provides a pyrolysis gas for treatment of additional hydrogen-deficient carbonaceous material. The amount of steam used and the conditions within the water-gas shift reaction zone and gas separation zone are controlled to obtain a steady-state composition of pyrolysis gas which will comprise hydrogen as the principal constituent and a minor amount of carbon monoxide, steam and methane so that no external source of hydrogen is needed to supply the hydrogen requirements of the process. In accordance with a particularly preferred embodiment, conditions are controlled such that there also is produced a significant quantity of benzene as a valuable coproduct.

Inventors:
 [1];  [2];  [3]
  1. Northridge, CA
  2. Woodland Hills, CA
  3. Huntington Beach, CA
Issue Date:
Research Org.:
ROCKWELL INTERNATIONAL CORP
OSTI Identifier:
865902
Patent Number(s):
4597776
Assignee:
Rockwell International Corporation (El Segundo, CA)
DOE Contract Number:  
AC21-78ET10328
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hydropyrolysis; process; improved; producing; methane-enriched; gas; hydrogen-deficient; carbonaceous; material; treated; hydrogen-containing; pyrolysis; elevated; temperature; pressure; produce; product; mixture; including; methane; carbon; monoxide; hydrogen; improvement; comprises; passing; sequentially; water-gas; shift; reaction; zone; separation; provide; separate; streams; recycle; comprising; controlled; amount; steam; provided; combined; provides; treatment; additional; conditions; obtain; steady-state; composition; comprise; principal; constituent; minor; external; source; supply; requirements; accordance; particularly; preferred; embodiment; produced; significant; quantity; benzene; valuable; coproduct; particularly preferred; pyrolysis gas; pyrolysis process; improved process; product gas; carbon monoxide; gas stream; preferred embodiment; elevated temperature; carbonaceous material; reaction zone; gas streams; gas mixture; improvement comprises; minor amount; gas separation; gas comprising; external source; separation zone; shift reaction; mixture including; comprising hydrogen; controlled amount; recycle gas; provide separate; gas shift; comprises passing; enriched gas; additional hydrogen; /48/201/423/585/

Citation Formats

Ullman, Alan Z, Silverman, Jacob, and Friedman, Joseph. Hydropyrolysis process. United States: N. p., 1986. Web.
Ullman, Alan Z, Silverman, Jacob, & Friedman, Joseph. Hydropyrolysis process. United States.
Ullman, Alan Z, Silverman, Jacob, and Friedman, Joseph. Wed . "Hydropyrolysis process". United States. https://www.osti.gov/servlets/purl/865902.
@article{osti_865902,
title = {Hydropyrolysis process},
author = {Ullman, Alan Z and Silverman, Jacob and Friedman, Joseph},
abstractNote = {An improved process for producing a methane-enriched gas wherein a hydrogen-deficient carbonaceous material is treated with a hydrogen-containing pyrolysis gas at an elevated temperature and pressure to produce a product gas mixture including methane, carbon monoxide and hydrogen. The improvement comprises passing the product gas mixture sequentially through a water-gas shift reaction zone and a gas separation zone to provide separate gas streams of methane and of a recycle gas comprising hydrogen, carbon monoxide and methane for recycle to the process. A controlled amount of steam also is provided which when combined with the recycle gas provides a pyrolysis gas for treatment of additional hydrogen-deficient carbonaceous material. The amount of steam used and the conditions within the water-gas shift reaction zone and gas separation zone are controlled to obtain a steady-state composition of pyrolysis gas which will comprise hydrogen as the principal constituent and a minor amount of carbon monoxide, steam and methane so that no external source of hydrogen is needed to supply the hydrogen requirements of the process. In accordance with a particularly preferred embodiment, conditions are controlled such that there also is produced a significant quantity of benzene as a valuable coproduct.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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