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Abstract
Dry-bed adsorptive desulfurization of biomass-based syngas with low to medium sulfur content using ZnO was investigated as an alternative to the conventional wet scrubbing processes. The technical feasibility of ZnO-based desulfurization was studied in laboratory-scale H2S breakthrough experiments. The experiments were set up to utilize realistic H2S concentrations from gasification and therefore long breakthrough times. Experiments were performed in a steam-rich model biosyngas in varying conditions. The long-term breakthrough experiments showed apparent ZnO utilization rates between 10 and 50% in the tested conditions, indicating intraparticle mass-transfer resistances partly due to space velocity and particle size constraints as well as the most likely product-layer resistances as evidenced by the large spent adsorbent surface area decrease. An empirical deactivation model to estimate full breakthrough curves was fitted to the laboratory-scale experimental data. Breakthrough experiment in tar-rich syngas was also performed with the conclusion that ZnO performance is not significantly affected by hydrocarbons despite carbon deposition on the particle surfaces.
Original language | English |
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Pages (from-to) | 3316-3325 |
Journal | Energy & Fuels |
Volume | 34 |
Issue number | 3 |
Early online date | 24 Feb 2020 |
DOIs | |
Publication status | Published - 19 Mar 2020 |
MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Desulfurization of Biomass Syngas Using ZnO-Based Adsorbents: Long-Term Hydrogen Sulfide Breakthrough Experiments'. Together they form a unique fingerprint.Projects
- 1 Finished
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COMSYN: Compact Gasification and Synthesis process for Transport Fuels
Simell, P. (Manager)
1/04/17 → 31/03/21
Project: EU project