TY - JOUR

T1 - Oxidation of hydrogen sulfide and corrosion of stainless steel in gas mixtures containing H2S, O2, H2O, and CO2

AU - Vostrikov, A. A.

AU - Fedyaeva, O. N.

AU - Shishkin, A. V.

AU - Sokol, M. Ya

PY - 2017/7/1

Y1 - 2017/7/1

N2 - The composition of volatile and solid products of oxidation of hydrogen sulfide and stainless steel in gas mixtures containing H2S, O2, H2O, and CO2 has been determined using mass spectrometry, x-ray diffraction analysis, and scanning electron microscopy. It has been shown that holding an H2S–O2 mixture at 301 K results in prevailing formation of elemental sulfur and iron sulfides in the form of porous hygroscopic crust on the reactor wall surface. Formation of gas-phase sulfur causes self-acceleration of the oxidation of hydrogen sulfide; the resulting water triggers corrosion of the reactor wall. Heating of the resulting sulfur-sulfide crust in O2 medium is accompanied by formation of SO2 and heat release at T > 508 K. After heating of the H2S–CO2 mixture to 615 K, H2 and COS were found in the volatile reactants; no noticeable corrosion of the reactor wall has been detected. It has been established that addition of O2 to the H2S–CO2 mixture and its heating to 673 K leads to formation of ferrous sulfates. The mechanisms of the observed processes are discussed.

AB - The composition of volatile and solid products of oxidation of hydrogen sulfide and stainless steel in gas mixtures containing H2S, O2, H2O, and CO2 has been determined using mass spectrometry, x-ray diffraction analysis, and scanning electron microscopy. It has been shown that holding an H2S–O2 mixture at 301 K results in prevailing formation of elemental sulfur and iron sulfides in the form of porous hygroscopic crust on the reactor wall surface. Formation of gas-phase sulfur causes self-acceleration of the oxidation of hydrogen sulfide; the resulting water triggers corrosion of the reactor wall. Heating of the resulting sulfur-sulfide crust in O2 medium is accompanied by formation of SO2 and heat release at T > 508 K. After heating of the H2S–CO2 mixture to 615 K, H2 and COS were found in the volatile reactants; no noticeable corrosion of the reactor wall has been detected. It has been established that addition of O2 to the H2S–CO2 mixture and its heating to 673 K leads to formation of ferrous sulfates. The mechanisms of the observed processes are discussed.

UR - http://www.scopus.com/inward/record.url?scp=85026772093&partnerID=8YFLogxK

U2 - 10.1134/S181023281703002X

DO - 10.1134/S181023281703002X

M3 - Article

AN - SCOPUS:85026772093

VL - 26

SP - 314

EP - 324

JO - Journal of Engineering Thermophysics

JF - Journal of Engineering Thermophysics

SN - 1810-2328

IS - 3

ER -