Thermodynamic Possibilities and Limits for Producer Gas Desulfurization and HCL Related Interferences for Zn, Mn, Ce and La Based Sorbents of Sulfur Compounds

Abstract:

The study is concentrated on thermodynamic analyses of gas desulfurization process (deep removal of H₂S, COS, thiophene) by selected solid sorbents (ZnO, MnO, Ce_xO_y and La₂O₃) and on interferences caused by presence of hydrogen halides in a temperature range 500-1100 K. The results show that theoretically Ce₂O₃ and La₂O₃ are the best sorbents for sulfur compounds at temperatures over approx. 700 K. The Ce_xO_y, La₂O₃ and MnO based sorbents can suffer from significant interferences caused by higher concentrations of HCl and HF in gas phase. The thermodynamic equilibria suggest that removal of HCl (HF) by soda based sorbents at temperatures 650 – 850 K is practically without interferences from sulfur compounds. The common alkali carbonates are less suitable than the calcium based (Ca (OH)₂, CaCO₃) sorbents for deep removal of HF.

• Periodical: Key Engineering Materials (Volumes 656-657)
• Pages: 101-106
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.656-657.101
• Online since: July 2015
• Authors: Karel Svoboda*, Miloslav Hartman, Michael Pohořelý, Michal Šyc, Petra Kameníková, Michal Jeremiáš, Liang Wei Huang
• Keywords: Desulfurization, Equilibria, HCL Removal, HF Removal, Syngas, Thermodynamic

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