Mixed-oxide sorbents for high-temperature removal of hydrogen sulfide
Abstract
Several pure and mixed oxides (ZnO, CuO, ZnO-Fe_2O_3, CuO-Fe_2O_3, CuO-AI_O_3, and CuO-Fe_2O_3-Al_2O_3) were investigated as regenerable sorbents for the removal of H_2S at high temperatures. A special technique was used to prepare the sorbents in highly porous form. The sorbents were subjected to successive sulfidation-regeneration cycles in a packed-bed microreactor. Sulfidation was carried out at 538-650 °C with H_2S-H_2O-H_2-N_2 mixtures, regeneration with O_2-N_2-H_2O mixtures. Fresh, sulfided, and regenerated sorbents were characterized by XRD, SEM-EDS, and BET surface area analysis. Solid conversion and the prebreakthrough exit concentration of H_2S are discussed in terms of physical structure and thermodynamic properties of the sorbents. The performance of the sorbents CuO-Fe_2O_3, CuO-Al_2O_3, and CuO-Fe_2O_3-AI_2O_3 is discussed in terms of changes in the oxidation state of copper during sulfidation.
Additional Information
© 1986 American Chemical Society. Received for review September 19, 1984. Revised manuscript received July 23, 1985. Accepted July 29, 1985. This work was carried out under a contract (DE-AI21-83MC20417) from the Department of Energy, Morgantown Energy Technology Center. The XRD and SEM/EDS analyses were performed by L. Lowry and R. Ruiz of the Jet Propulsion Laboratory. We thank Dr. G. Krishnan of SRI International for the mercury porosimetry analyses performed in his laboratory.Additional details
- Eprint ID
- 60898
- DOI
- 10.1021/i200033a014
- Resolver ID
- CaltechAUTHORS:20151008-112330339
- DE-AI21-83MC20417
- Department of Energy (DOE)
- Created
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2015-10-12Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field