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Hydrogen Sulfide Corrosion of Carbon and Stainless Steel Alloys in Mixtures of Renewable Fuel Sources under Co-Processing Conditions
Department of Physical Chemistry, Institute of Chemistry, University of Pannonia, Egyetem, Hungary .
Department of General and Inorganic Chemistry, Institute of Chemistry, University of Pannonia, Egyetem, Hungary .ORCID iD: 0000-0002-0271-4846
Department of Inspection and Maintenance, Mol Nyrt., Olajmunkás, Hungary .
Refining Research and Innovation, Mol Nyrt., Hungary .
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2018 (English)In: Modern Applied Science, ISSN 1913-1844, E-ISSN 1913-1852, Vol. 12, no 4, p. 227-255Article in journal (Refereed) Published
Abstract [en]

Corrosion rates of steel alloys were investigated in gas oil and its mixture with waste cooking oil and animal waste lard over 1, 3, 7 and 21 days under desulfurizing condition. Co-processing conditions were attempted to simulate by batch-reactor experiment at temperatures between 200 and 300oC and pressures between 20 and 90 bar in the presence of 2 volume% hydrogen sulfide. Integral and differential corrosion rates were defined by weight losses. Intense sulfide corrosion of carbon steels was less impacted by the biomass sources. Thinner scales in gas oil was probably due to frequent cohesive failure, whereas thicker layers in biomass mixtures were allowed to form to afford limited physical protection. The high corrosion rate of low alloy steel with temperature over time is related to inefficient protection by the metal sulfide scales. Greater activation energy and enthalpy balance in the formation of activated complex is expected to reflect in thick cohesive scales. Loose layers and the less unfavorable entropy balance in the transition state did not lead to valuable barrier protection. High sulfide corrosion resistance of stainless steels is in chemical in nature markedly impacted by the biomass fuel sources and contributed especially by the acidic species. Corrosion rates increased with temperature by magnitude similar to those of carbon steels, which probably owes to the less unfavorable entropy and free energy balance between the initial and transition states of the reactants.

Place, publisher, year, edition, pages
Canadian Center of Science and Education , 2018. Vol. 12, no 4, p. 227-255
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Materials Chemistry Other Physics Topics
Research subject
Applied Physics
Identifiers
URN: urn:nbn:se:ltu:diva-68134DOI: 10.5539/mas.v12n4p227OAI: oai:DiVA.org:ltu-68134DiVA, id: diva2:1194513
Available from: 2018-04-03 Created: 2018-04-03 Last updated: 2018-04-09Bibliographically approved

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Publisher's full texthttps://www.researchgate.net/publication/324131081_Hydrogen_Sulfide_Corrosion_of_Carbon_and_Stainless_Steel_Alloys_in_Mixtures_of_Renewable_Fuel_Sources_under_Co-Processing_Conditions

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