Author, as appears in the article.: Cheikhwafa, Jacky; Torrens, Esther; Bengoa, Christophe
Department: Enginyeria Química
URV's Author/s: Bengoa, Christophe José / Cheikhwafa, Jacky / Torrens Serrahima, Esther
Keywords: Waste-water Temperature Sewage-sludge Process optimization Primary sludge Microalgae Hydrothermal liquefaction Homogeneous and heterogeneous catalysts Biocrud Bio-oil Alga
Abstract: Effect of homogeneous and heterogeneous catalysts on hydrothermal liquefaction of primary sludge was studied. Biocrude, biochar, aqueous phase and biogas were all affected, in terms of quantity and quality. HTL without any catalyst attained a biocrude yield of 37.7 % (w/w VS ). The best improvements in biocrude yield are observed with CuSO 4 (10 %), 42.20 % (w/w VS ) and TiO 2 (20 %), 41.90 % (w/w VS ). All experiments with catalyst produced a biocrude with HHV higher than 30 MJ/kg and with carbon content higher than 60 %. The analysis demonstrated that the major fraction of biocrude were asphaltenes, the heavier phase. While, the light phase, oils, in most of the cases, contained more saturates than polars. Biochar and aqueous phase were recuperated with high organic contents, that enables their usages in further applications. Even though gas fractions were small, their compositions varied between CO, CO 2 and hydrocarbons. Catalysts were normally recuperated with the solid phase, except some cases due to their particle sizes. Most of the ashes of primary sludge were transferred to biochar. Some parts of them went to the aqueous phase and biocrude during separation process.
Thematic Areas: Saúde coletiva Química Organic chemistry Odontología Medicina i Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências General chemical engineering Fuel technology Farmacia Ensino Engineering, chemical Engenharias iv Engenharias iii Engenharias ii Engenharias i Energy engineering and power technology Energy & fuels Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Biodiversidade Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: jacky.cheikhwafa@urv.cat jacky.cheikhwafa@urv.cat christophe.bengoa@urv.cat esther.torrens@urv.cat esther.torrens@urv.cat
Author identifier: 0000-0001-9160-5010
Record's date: 2024-07-20
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.sciencedirect.com/science/article/pii/S0016236124008639
Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Fuel. 369 131715-
APA: Cheikhwafa, Jacky; Torrens, Esther; Bengoa, Christophe (2024). Influence of catalysts on the hydrothermal liquefaction of municipal primary sludge: Upgrading to a higher quality biocrude. Fuel, 369(), 131715-. DOI: 10.1016/j.fuel.2024.131715
Article's DOI: 10.1016/j.fuel.2024.131715
Entity: Universitat Rovira i Virgili
Journal publication year: 2024
Publication Type: Journal Publications
Repositori URV