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Mixed-oxide sorbents for high-temperature removal of hydrogen sulfide

Tamhankar, S. S. and Bagajewicz, M. and Gavalas, G. R. and Sharma, P. K. and Flytzani-Stephanopoulos, M. (1986) Mixed-oxide sorbents for high-temperature removal of hydrogen sulfide. Industrial & Engineering Chemistry Process Design and Development, 25 (2). pp. 429-437. ISSN 0196-4305. http://resolver.caltech.edu/CaltechAUTHORS:20151008-112330339

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/i200033a014DOIArticle
http://pubs.acs.org/doi/abs/10.1021/i200033a014PublisherArticle
ORCID:
AuthorORCID
Gavalas, G. R.0000-0003-1468-6835
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.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-AI21-83MC20417
Record Number:CaltechAUTHORS:20151008-112330339
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151008-112330339
Official Citation:Mixed-oxide sorbents for high-temperature removal of hydrogen sulfide S. S. Tamhankar, M. Bagajewicz, G. R. Gavalas, P. K. Sharma, and M. Flytzani-Stephanopoulos Industrial & Engineering Chemistry Process Design and Development 1986 25 (2), 429-437 DOI: 10.1021/i200033a014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60898
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:12 Oct 2015 19:44
Last Modified:22 Sep 2017 18:08

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