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

Patent · Sat Jan 01 00:00:00 EST 1977

OSTI ID:862876

Matthews, Charles W ^[1]

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1. Denver, CO

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.

• DOE Contract Number: OCR2053
• Assignee: United States Energy Research and Development Administration (Washington, DC)
• Patent Number(s): US 4032618
• OSTI ID: 862876
• Country of Publication: United States
• Language: English

Related Subjects

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
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