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The effects of pressure and temperature on the catalytic oxidation of hydrogen sulfide in natural gas and regeneration of the catalyst to recover the sulfur produced
Author(s) -
Dalai Ajay K.,
Majumdar Amitabha,
Chowdhury Aminul,
Tollefson Eric L.
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710111
Subject(s) - catalysis , hydrogen sulfide , sulfur , chemistry , sulfide , atmospheric pressure , chemical engineering , desorption , inorganic chemistry , hydrogen , flue gas desulfurization , natural gas , organic chemistry , adsorption , oceanography , engineering , geology
The influence of pressure up to 5600 kPa and temperature up to 175 °C on the oxidation of low concentrations of H 2 S in natural gas was studied in a fixed bed reactor over an activated carbon catalyst. Operation of this system at 5600 kPa provides higher catalyst activity (virtually 100% H 2 S conversion) over a longer period of time and with lower selectivity to SO 2 than when operated at atmospheric pressure. The desorption of sulfur from a loaded catalyst occurs first from the macropores (> 100 nm) of the catalyst which contain a substantial portion of the sulfur load and then from the micropores (< 100 nm). This study also indicated that the sulfur recovery process is both rapid and effective at 327°C.