Thermodynamic Characteristics of the Hydrogen Sulfide Sorption Process by Ferromanganese Materials
Year: 2022
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide The work analyzes hydrogen sulfide sorption from model gas mixtures containing H 2 S from 1.25 × 10 –3 to 1.28 × 10 –4 mol/L under static conditions at temperatures 253 and 298 K on the raw manganese ore of the Ulu-Telyak deposit (Bashkortostan, Russia), manganese(IV) oxide, and manganese(IV) and iron(III) oxide mixtures. The thermodynamic models for calculating the equilibrium constants and Gibbs energy changes were analyzed. The sorption isotherms were described by the Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich models. The value of enthalpy of hydrogen sorption on the ore was −68.98 ± 3.45 kJ/mol and those on model mixtures Mn 4 + Fe 2 O 3 and MnO 4 were ±12.20 kJ/mol and −103.826 ± 5.19 kJ/mol, respectively, and the entropies of the hydrogen sulfide sorption process on three manganese materials at 253 K were calculated. The limiting capacity values of manganese materials at 253 and 298 K were obtained. The morphological analysis of the ore samples, Mn 4 + Fe 2 O 3, and MnO 4, before and after hydrogen sulfide sorption, was carried out at 253 K. The obtained thermodynamic parameters determine the advantage of using the raw manganese ore over pure oxides, which characterizes its effective practical application in the desulfurization process.
Source: ACS Omega
Institution: Saint Petersburg Mining University
Language: English
Subfield: Environmental Engineering
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,250
OpenAlex ID: W4206246786