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Title: Conversion of ammonia into hydrogen and nitrogen by reaction with a sulfided catalyst

Abstract

A method is provided for removing ammonia from the sour water stream of a coal gasification process. The basic steps comprise stripping the ammonia from the sour water; heating the stripped ammonia to a temperature from between 400.degree. to 1,000.degree. F; passing the gaseous ammonia through a reactor containing a sulfided catalyst to produce elemental hydrogen and nitrogen; and scrubbing the reaction product to obtain an ammonia-free gas. The residual equilibrium ammonia produced by the reactor is recycled into the stripper. The ammonia-free gas may be advantageously treated in a Claus process to recover elemental sulfur. Iron sulfide or cobalt molybdenum sulfide catalysts are used.

Inventors:
 [1]
  1. Denver, CO
Issue Date:
OSTI Identifier:
862876
Patent Number(s):
4032618
Assignee:
United States Energy Research and Development Administration (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01C - AMMONIA
DOE Contract Number:  
OCR2053
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
conversion; ammonia; hydrogen; nitrogen; reaction; sulfided; catalyst; method; provided; removing; sour; water; stream; coal; gasification; process; basic; steps; comprise; stripping; heating; stripped; temperature; 400; degree; 000; passing; gaseous; reactor; containing; produce; elemental; scrubbing; product; obtain; ammonia-free; gas; residual; equilibrium; produced; recycled; stripper; advantageously; treated; claus; recover; sulfur; iron; sulfide; cobalt; molybdenum; catalysts; water stream; iron sulfide; reactor containing; elemental sulfur; coal gasification; reaction product; gasification process; coal gas; molybdenum sulfide; sulfide catalysts; gaseous ammonia; produce elemental; sour water; sulfide catalyst; /423/

Citation Formats

Matthews, Charles W. Conversion of ammonia into hydrogen and nitrogen by reaction with a sulfided catalyst. United States: N. p., 1977. Web.
Matthews, Charles W. Conversion of ammonia into hydrogen and nitrogen by reaction with a sulfided catalyst. United States.
Matthews, Charles W. Sat . "Conversion of ammonia into hydrogen and nitrogen by reaction with a sulfided catalyst". United States. https://www.osti.gov/servlets/purl/862876.
@article{osti_862876,
title = {Conversion of ammonia into hydrogen and nitrogen by reaction with a sulfided catalyst},
author = {Matthews, Charles W},
abstractNote = {A method is provided for removing ammonia from the sour water stream of a coal gasification process. The basic steps comprise stripping the ammonia from the sour water; heating the stripped ammonia to a temperature from between 400.degree. to 1,000.degree. F; passing the gaseous ammonia through a reactor containing a sulfided catalyst to produce elemental hydrogen and nitrogen; and scrubbing the reaction product to obtain an ammonia-free gas. The residual equilibrium ammonia produced by the reactor is recycled into the stripper. The ammonia-free gas may be advantageously treated in a Claus process to recover elemental sulfur. Iron sulfide or cobalt molybdenum sulfide catalysts are used.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

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