Regenerable Sorbents for High-Temperature Desulfurization of Syngas from Biomass Gasification
Peer reviewed, Journal article
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OriginalversjonChemie Ingenieur Technik. 2021, 93 (6), 949-958. 10.1002/cite.202000217
Single-metal high-temperature solid sorbents for syngas cleaning using Mn, Ca, Fe, Cu, or Mo supported on γ-Al2O3 were synthesized, characterized, and tested in a fixed-bed reactor. H2S and SO2 concentrations in the gas after treatment at T = 400 to 700 °C were compared with thermodynamic calculations. The Mn-based sorbent showed the best ability to achieve a low sulfur residual in the gas, especially at temperatures above 600 °C. Sorbents with Fe, Cu, and Mo gave SO2 formation in the initial phase, but this could be avoided by a pre-reduction treatment of the sorbent material.