In-situ regeneration of activated carbon with electric potential swing desorption (EPSD) for the H 2 S removal from biogas

Abstract

In-situ regeneration of a granular activated carbon was conducted for the first time using electric potential swing desorption (EPSD) with potentials up to 30 V. The EPSD system was compared against a standard non-potential system using a fixed-bed reactor with a bed of 10 g of activated carbon treating a gas mixture with 10,000 ppm H2S. Breakthrough times, adsorption desorption volume, capacities, effect of regeneration and desorption kinetics were investigated. The analysis showed that desorption of H2S using the new EPSD system was 3 times quicker compared with the no potential system. Hence, physical adsorption using EPSD over activated carbon is efficient, safe and environmental friendly and could be used for the in-situ regeneration of granular activated carbon without using a PSA and/or TSA system. Additionally, adsorption and desorption cycles can be obtained with a classical two column system, which could lead towards a more efficient and economic biogas to biomethane process.

Publication DOI: https://doi.org/10.1016/j.biortech.2017.09.198
Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
College of Engineering & Physical Sciences
Additional Information: © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Publication ISSN: 1873-2976
Full Text Link:
Related URLs: https://www.sci ... 7741?via%3Dihub (Publisher URL)
PURE Output Type: Article
Published Date: 2018-02-01
Published Online Date: 2017-10-04
Accepted Date: 2017-09-28
Authors: Farooq, M.
Almustapha, M.N.
Imran, M. (ORCID Profile 0000-0002-3057-1301)
Saeed, M.A.
Andresen, John M.

Export / Share Citation


Statistics

Additional statistics for this record