Catalytic gasification of glycerol in supercritical water
The conversion of glycerol in supercritical water (SCW) was studied at 510-550 °C and a pressure of 350 bars using both a bed of inert and non-porous ZrO2 particles (hydrothermal experiments), and a bed of a 1% Ru/ZrO2 catalyst. Experiments were conducted with a glycerol concentration of 5 wt% in a...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2010 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/62753 |
| Acceso en línea: | https://hdl.handle.net/2445/62753 |
| Access Level: | acceso abierto |
| Palabra clave: | Biotecnologia Gasificació de la biomassa Hidrogen Producció Ruteni Catalitzadors Biotechnology Biomass gasification Hydrogen Production Ruthenium Catalysts |
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Catalytic gasification of glycerol in supercritical waterMay Masnou, AnnaSalvadó i Rovira, JoanTorras, CarlesMontané i Calaf, DanielBiotecnologiaGasificació de la biomassaHidrogenProduccióRuteniCatalitzadorsBiotechnologyBiomass gasificationHydrogenProductionRutheniumCatalystsThe conversion of glycerol in supercritical water (SCW) was studied at 510-550 °C and a pressure of 350 bars using both a bed of inert and non-porous ZrO2 particles (hydrothermal experiments), and a bed of a 1% Ru/ZrO2 catalyst. Experiments were conducted with a glycerol concentration of 5 wt% in a continuous isothermal fixed-bed reactor at a residence time between 2 and 10 s. Hydrothermolysis of glycerol formed water-soluble products such as acetaldehyde, acetic acid, hydroxyacetone and acrolein, and gases like H2, CO and CO2. The catalyst enhanced the formation of acetic acid, inhibited the formation of acrolein, and promoted gasification of the glycerol decomposition products. Hydrogen and carbon oxides were the main gases produced in the catalytic experiments, with minor amounts of methane and ethylene. Complete glycerol conversion was achieved at a residence time of 8.5 s at 510 °C, and at around 5 s at 550 °C with the 1 wt% Ru/ZrO2 catalyst. The catalyst was not active enough to achieve complete gasification since high yields of primary products like acetic acid and acetaldehyde were still present. Carbon balances were between 80 and 60% in the catalytic experiments, decreasing continuously as the residence time was increased. This was attributed partially to the formation of methanol and acetaldehyde, which were not recovered and analyzed efficiently in our set-up, but also to the formation of carbon deposits. Carbon deposition was not observed on the catalyst particles but on the surface of the inert zirconia particles, especially at high residence time. This was related to the higher concentration of acetic acid and other acidic species in the catalytic experiments, which may polymerize to form tar-like carbon precursors. Because of carbon deposition, hydrogen yields were significantly lower than expected; for instance at 550 °C the hydrogen yield potential was only 50% of the stoichiometric value.University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/62753Articles publicats en revistes (Enginyeria Química i Química Analítica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: http://dx.doi.org/10.1016/j.cej.2010.04.005Chemical Engineering Journal, 2010, vol. 160, num. 2, p. 751-759http://dx.doi.org/10.1016/j.cej.2010.04.005(c) University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics, 2010info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/627532026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
Catalytic gasification of glycerol in supercritical water |
| title |
Catalytic gasification of glycerol in supercritical water |
| spellingShingle |
Catalytic gasification of glycerol in supercritical water May Masnou, Anna Biotecnologia Gasificació de la biomassa Hidrogen Producció Ruteni Catalitzadors Biotechnology Biomass gasification Hydrogen Production Ruthenium Catalysts |
| title_short |
Catalytic gasification of glycerol in supercritical water |
| title_full |
Catalytic gasification of glycerol in supercritical water |
| title_fullStr |
Catalytic gasification of glycerol in supercritical water |
| title_full_unstemmed |
Catalytic gasification of glycerol in supercritical water |
| title_sort |
Catalytic gasification of glycerol in supercritical water |
| dc.creator.none.fl_str_mv |
May Masnou, Anna Salvadó i Rovira, Joan Torras, Carles Montané i Calaf, Daniel |
| author |
May Masnou, Anna |
| author_facet |
May Masnou, Anna Salvadó i Rovira, Joan Torras, Carles Montané i Calaf, Daniel |
| author_role |
author |
| author2 |
Salvadó i Rovira, Joan Torras, Carles Montané i Calaf, Daniel |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Biotecnologia Gasificació de la biomassa Hidrogen Producció Ruteni Catalitzadors Biotechnology Biomass gasification Hydrogen Production Ruthenium Catalysts |
| topic |
Biotecnologia Gasificació de la biomassa Hidrogen Producció Ruteni Catalitzadors Biotechnology Biomass gasification Hydrogen Production Ruthenium Catalysts |
| description |
The conversion of glycerol in supercritical water (SCW) was studied at 510-550 °C and a pressure of 350 bars using both a bed of inert and non-porous ZrO2 particles (hydrothermal experiments), and a bed of a 1% Ru/ZrO2 catalyst. Experiments were conducted with a glycerol concentration of 5 wt% in a continuous isothermal fixed-bed reactor at a residence time between 2 and 10 s. Hydrothermolysis of glycerol formed water-soluble products such as acetaldehyde, acetic acid, hydroxyacetone and acrolein, and gases like H2, CO and CO2. The catalyst enhanced the formation of acetic acid, inhibited the formation of acrolein, and promoted gasification of the glycerol decomposition products. Hydrogen and carbon oxides were the main gases produced in the catalytic experiments, with minor amounts of methane and ethylene. Complete glycerol conversion was achieved at a residence time of 8.5 s at 510 °C, and at around 5 s at 550 °C with the 1 wt% Ru/ZrO2 catalyst. The catalyst was not active enough to achieve complete gasification since high yields of primary products like acetic acid and acetaldehyde were still present. Carbon balances were between 80 and 60% in the catalytic experiments, decreasing continuously as the residence time was increased. This was attributed partially to the formation of methanol and acetaldehyde, which were not recovered and analyzed efficiently in our set-up, but also to the formation of carbon deposits. Carbon deposition was not observed on the catalyst particles but on the surface of the inert zirconia particles, especially at high residence time. This was related to the higher concentration of acetic acid and other acidic species in the catalytic experiments, which may polymerize to form tar-like carbon precursors. Because of carbon deposition, hydrogen yields were significantly lower than expected; for instance at 550 °C the hydrogen yield potential was only 50% of the stoichiometric value. |
| publishDate |
2010 |
| dc.date.none.fl_str_mv |
2010 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion |
| format |
article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/62753 |
| url |
https://hdl.handle.net/2445/62753 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.cej.2010.04.005 Chemical Engineering Journal, 2010, vol. 160, num. 2, p. 751-759 http://dx.doi.org/10.1016/j.cej.2010.04.005 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics |
| publisher.none.fl_str_mv |
University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Enginyeria Química i Química Analítica) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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Dipòsit Digital de la UB |
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Dipòsit Digital de la UB |
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15,301603 |