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Experimental determination of air‐h 2 s equilibria under claus furnace conditions
Author(s) -
Bennett Howard A.,
Meisen Axel
Publication year - 1981
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.5450590422
Subject(s) - chemistry , dissociation (chemistry) , sulfur , stoichiometry , claus process , impurity , analytical chemistry (journal) , thermodynamics , chromatography , organic chemistry , hydrogen sulfide , physics
Since little fundamental information is available on the Claus furnace, equilibrium compositions of air‐H 2 S mixtures were calculated for temperatures and O 2 /H 2 S ratios ranging from 600 to 2000°K and 0 to 1, respectively. Sulphur yields were found to increase marginally when O 2 /H 2 S ratios less than 0.5 (stoichiometric) are used. Feed impurities such as H 2 O, CO 2 and NH 3 generally diminish the sulphur yields. To determine equilibrium compositions experimentally, known air‐H 2 S mixtures were reacted in the range of 800 to 1500°K and the products were analyzed chromatographically. The measurements for H 2 S dissociation agreed well with theory and Raymont's experimental data; the results for H 2 S oxidation showed the same trends as theoretical predictions, but did not agree quantitatively. Reasons for the discrepancies and their practical implications are discussed.