{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T19:23:58Z","timestamp":1790537038261,"version":"4.1.0"},"reference-count":32,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2023,7,20]],"date-time":"2023-07-20T00:00:00Z","timestamp":1689811200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Regional Development Fund","award":["T2EDK-00455 PYRO-D"],"award-info":[{"award-number":["T2EDK-00455 PYRO-D"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The goal of this work is to develop a sustainable value chain of carbonaceous adsorbents that can be produced from the solid fibrous digestate (SFD) of biogas plants and further applied in integrated desulfurization-upgrading (CO2\/CH4 separation) processes of biogas to yield high-purity biomethane. For this purpose, physical and chemical activation of the SFD-derived BC was optimized to afford micro-mesoporous activated carbons (ACs) of high BET surface area (590\u20132300 m2g\u22121) and enhanced pore volume (0.57\u20131.0 cm3g\u22121). Gas breakthrough experiments from fixed bed columns of the obtained ACs, using real biogas mixture as feedstock, unveiled that the physical and chemical activation led to different types of ACs, which were sufficient for biogas upgrade and biogas desulfurization, respectively. Performing breakthrough experiments at three temperatures close to ambient, it was possible to define the optimum conditions for enhanced H2S\/CO2 separation. It was also concluded that the H2S adsorption capacity was significantly affected by the restriction to gas diffusion. Hence, the best performance was obtained at 50 \u00b0C, and the maximum observed in the H2S adsorption capacity vs. the temperature was attributed to the counterbalance between adsorption and diffusion processes.<\/jats:p>","DOI":"10.3390\/ma16145119","type":"journal-article","created":{"date-parts":[[2023,7,20]],"date-time":"2023-07-20T04:27:13Z","timestamp":1689827233000},"page":"5119","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Adsorption of Hydrogen Sulfide on Activated Carbon Materials Derived from the Solid Fibrous Digestate"],"prefix":"10.3390","volume":"16","author":[{"given":"Evangelia","family":"Choleva","sequence":"first","affiliation":[{"name":"QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece"},{"name":"Institute of Nanoscience and Nanotechnology, National Center of Scientific Research \u201cDemokritos\u201d, 15310 Athens, Greece"},{"name":"Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anastasios","family":"Mitsopoulos","sequence":"additional","affiliation":[{"name":"QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece"},{"name":"Biogas Lagada SA, 677 Parcel, Kolchiko, 57200 Lagadas, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Georgia","family":"Dimitropoulou","sequence":"additional","affiliation":[{"name":"QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4570-6982","authenticated-orcid":false,"given":"George Em.","family":"Romanos","sequence":"additional","affiliation":[{"name":"Institute of Nanoscience and Nanotechnology, National Center of Scientific Research \u201cDemokritos\u201d, 15310 Athens, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evangelos","family":"Kouvelos","sequence":"additional","affiliation":[{"name":"Institute of Nanoscience and Nanotechnology, National Center of Scientific Research \u201cDemokritos\u201d, 15310 Athens, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"George","family":"Pilatos","sequence":"additional","affiliation":[{"name":"Institute of Nanoscience and Nanotechnology, National Center of Scientific Research \u201cDemokritos\u201d, 15310 Athens, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Konstantinos","family":"Beltsios","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece"},{"name":"School of Chemical Engineering, National Technical University of Athens, Zografou Campus, 9, Iroon Polytechniou Str., Zografou, 15780 Athens, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4641-0916","authenticated-orcid":false,"given":"Stylianos","family":"Stefanidis","sequence":"additional","affiliation":[{"name":"Laboratory of Environmental Fuels\/Biofuels and Hydrocarbons, Chemical Process and Energy Resources Institute, CERTH, 57001 Thessaloniki, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Angelos","family":"Lappas","sequence":"additional","affiliation":[{"name":"Laboratory of Environmental Fuels\/Biofuels and Hydrocarbons, Chemical Process and Energy Resources Institute, CERTH, 57001 Thessaloniki, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9020-2719","authenticated-orcid":false,"given":"Themistoklis","family":"Sfetsas","sequence":"additional","affiliation":[{"name":"QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,20]]},"reference":[{"key":"ref_1","unstructured":"McKinsey, S.Z. (2003). Removal of Hydrogen Sulfide from Biogas Using Cow-Manure Compost. [Ph.D. Thesis, Cornell University]."},{"key":"ref_2","first-page":"155","article-title":"Hydrogen sulfide removal from biogas using chemical absorption technique in packed column reactors","volume":"5","author":"Kulkarni","year":"2019","journal-title":"Glob. J. Environ. Sci. Manag."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Shareefdeen, Z., and Singh, A. (2005). Biotechnology for Odor and Air Pollution Control, Springer Science & Business Media.","DOI":"10.1007\/b138434"},{"key":"ref_4","first-page":"7","article-title":"Notwendigkeit der Biogasaufbereitung, Anspr\u00fcche einzelner Nutzungsrouten und Stand der Technik","volume":"21","author":"Weiland","year":"2003","journal-title":"G\u00fclzower Fachgespr."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1016\/j.fuproc.2014.03.010","article-title":"Effects of humidity, O2, and CO2 on H2S adsorption onto upgraded and KOH impregnated activated carbons","volume":"124","author":"Sitthikhankaew","year":"2014","journal-title":"Fuel Process. Technol."},{"key":"ref_6","unstructured":"(2023, June 07). Council Directive of 12 December 1991 Concerning the Protection of Waters against Pollution Caused by Nitrates from Agricultural Sources (91\/676\/EEC). Available online: https:\/\/eur-lex.europa.eu\/eli\/dir\/1991\/676\/2008-12-11."},{"key":"ref_7","unstructured":"Allegue, L.B., and Hinge, J. (2023, May 22). Biogas Upgrading Evaluation of Methods for H2S removal. Danish Technological Institute. Available online: https:\/\/www.teknologisk.dk\/_\/media\/60599_Biogas%20upgrading.%20Evalution%20of%20metods%20for%20H2S%20removal.pdf."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"359","DOI":"10.1016\/j.biortech.2016.12.083","article-title":"Biochar as potential sustainable precursors for activated carbon production: Multiple applications in environmental protection and energy storage","volume":"227","author":"Tan","year":"2017","journal-title":"Bioresour. Technol."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Georgiadis, A.G., Charisiou, N.D., and Goula, M.A. (2020). Removal of Hydrogen Sulfide From Various Industrial Gases: A Review of The Most Promising Adsorbing Materials. Catalysts, 10.","DOI":"10.3390\/catal10050521"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"330","DOI":"10.1016\/j.carbon.2006.09.016","article-title":"Adsorption of hydrogen sulphide (H2S) by activated carbons derived from oil-palm shell","volume":"45","author":"Guo","year":"2007","journal-title":"Carbon"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1016\/j.biombioe.2018.04.015","article-title":"Production and characterization of activated carbon from barley straw by physical activation with carbon dioxide and steam","volume":"115","author":"Arauzo","year":"2018","journal-title":"Biomass Bioenergy"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1006\/jcis.2000.7171","article-title":"Effects of Burn-off and Activation Temperature on Preparation of Activated Carbon from Corn Cob Agrowaste by CO2 and Steam","volume":"232","year":"2000","journal-title":"J. Colloid Interface Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"254","DOI":"10.1016\/j.biortech.2013.01.044","article-title":"Preparation of highly porous binderless activated carbon electrodes from fibres of oil palm empty fruit bunches for application in supercapacitors","volume":"132","author":"Farma","year":"2013","journal-title":"Bioresour. Technol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"505","DOI":"10.1016\/0008-6223(96)00006-1","article-title":"Effect of steam and carbon dioxide activation in the micropore size distribution of activated carbon","volume":"34","author":"Gonzalez","year":"1996","journal-title":"Carbon"},{"key":"ref_15","first-page":"25","article-title":"Adsorption of hydrogen sulfide by activated carbon produced by regeneration of sludge from upflow anaerobic sludge blanket","volume":"5","author":"Calderon","year":"2022","journal-title":"Eng. Rural. Dev."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"107177","DOI":"10.1016\/j.jece.2022.107177","article-title":"Preparation and characterization of cattle manure-based activated carbon for hydrogen sulfide removal at room temperature","volume":"10","author":"Tuerhong","year":"2022","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"108463","DOI":"10.1016\/j.jmgm.2023.108463","article-title":"A computational study of adsorption of H2S and SO2 on the activated carbon surfaces","volume":"122","author":"Hussain","year":"2023","journal-title":"J. Mol. Graph. Model."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Tangsathitkulchai, C., Naksusuk, S., Wongkoblap, A., Phadungbut, P., and Borisut, P. (2021). Equilibrium and Kinetics of CO2 Adsorption by Coconut Shell Activated Carbon Impregnated with Sodium Hydroxide. Processes, 9.","DOI":"10.3390\/pr9020201"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"209","DOI":"10.3390\/reactions2030014","article-title":"Adsorption-Based Hydrogen Storage in Activated Carbons and Model Carbon Structures","volume":"2","author":"Fomkin","year":"2021","journal-title":"Reactions"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Medell\u00edn-Castillo, N.A., Ocampo-P\u00e9rez, R., Forgionny, A., Labrada-Delgado, G.J., Z\u00e1rate-Guzm\u00e1n, A.I., Cruz-Briano, S.A., and Flores-Ram\u00edrez, R. (2021). Insights into Equilibrium and Adsorption Rate of Phenol on Activated Carbon Pellets Derived from Cigarette Butts. Processes, 9.","DOI":"10.3390\/pr9060934"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Jurkiewicz, M., and Pe\u0142ech, R. (2021). Adsorption of 1,2-Dichlorobenzene from the Aqueous Phase onto Activated Carbons and Modified Carbon Nanotubes. Int. J. Mol. Sci., 22.","DOI":"10.3390\/ijms222313152"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Wang, R.-S., Li, Y., Shuai, X.-X., Liang, R.-H., Chen, J., and Liu, C.-M. (2021). Pectin\/Activated Carbon-Based Porous Microsphere for Pb2+ Adsorption: Characterization and Adsorption Behaviour. Polymers, 13.","DOI":"10.3390\/polym13152453"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"100864","DOI":"10.1016\/j.biteb.2021.100864","article-title":"Phosphate adsorption using biochar derived from solid digestate","volume":"16","author":"Alberto","year":"2021","journal-title":"Bioresour. Technol. Rep."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"551","DOI":"10.1016\/j.apenergy.2013.09.058","article-title":"Production of microporous biochars by single-step oxidation: Effect of activation conditions on CO2 capture","volume":"114","author":"Plaza","year":"2014","journal-title":"Appl. Energy"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"279","DOI":"10.1016\/j.jaap.2008.04.007","article-title":"Preparation and characteristics of agricultural waste activated carbon by physical activation having micro- and mesopores","volume":"82","author":"Aworn","year":"2008","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"321","DOI":"10.1016\/S0927-7757(02)00049-3","article-title":"Adsorption and diffusion in nanoporous materials from stochastic and process-based reconstruction techniques","volume":"206","author":"Kainourgiakis","year":"2002","journal-title":"Colloids Surfaces A Physicochem. Eng. Asp."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/j.micromeso.2008.08.058","article-title":"Methods of evaluating pore morphology in hybrid organic\u2013inorganic porous materials","volume":"120","author":"Romanos","year":"2008","journal-title":"Microporous Mesoporous Mater."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/j.micromeso.2018.03.012","article-title":"CO2 adsorption behavior of amine-functionalized ZIF-8, graphene oxide, and ZIF-8\/graphene oxide composites under dry and wet conditions","volume":"267","author":"Pokhrel","year":"2018","journal-title":"Microporous Mesoporous Mater."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"96","DOI":"10.1016\/j.jaap.2005.08.001","article-title":"Influence of pyrolysis conditions on pore development of oil-palm-shell activated carbons","volume":"76","author":"Jia","year":"2006","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"215","DOI":"10.1016\/j.jaap.2011.12.014","article-title":"Effects of pyrolysis conditions on the porous structure development of date pits activated carbon","volume":"94","author":"Bouchelta","year":"2012","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1016\/j.jaap.2013.10.013","article-title":"A study of lignocel-lulosic biomass pyrolysis via the pyrolysis of cellulose, hemicellulose and lignin","volume":"105","author":"Stefanidis","year":"2014","journal-title":"J. Anal. Appl. Pyrolysis"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"482","DOI":"10.1016\/j.polymdegradstab.2014.10.007","article-title":"Catalytic and thermal pyrolysis of polycarbonate in a fixed-bed reactor: The effect of catalysts on products yields and composition","volume":"110","author":"Antonakou","year":"2014","journal-title":"Polym. Degrad. Stab."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/14\/5119\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T20:15:32Z","timestamp":1760127332000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/14\/5119"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,7,20]]},"references-count":32,"journal-issue":{"issue":"14","published-online":{"date-parts":[[2023,7]]}},"alternative-id":["ma16145119"],"URL":"https:\/\/doi.org\/10.3390\/ma16145119","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,7,20]]}}}