A PROCESS FOR THE OXIDATION OF HYDROGEN SULFIDE TO SULFUR TRIOXIDE WITH SUBSEQUENT SULFUR REMOVAL AND A PLANT FOR CARRYING OUT THE PROCESS
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United States of America Patent
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Aug 24, 2017
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Sep 9, 2015
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Sep 16, 2014
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Abstract
A process for the oxidation of hydrogen sulfide to sulfur trioxide with subsequent sulfur trioxide removal comprises oxidizing hydrogen sulfide to sulfur trioxide in at least one catalyst-containing reactor and feeding the effluent from the last reactor to a candle filter unit for SO3 removal, where it is mixed with an injected alkaline sorbent slurry or powder to form an alkali sulfate and a hot clean gas. Preferably the oxidation is done in two reactors, the first oxidizing H2S to SO2 over a monolith type catalyst and the second oxidizing SO2 to SO3 over a VK type catalyst.
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