Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃

The aim of the present research is to investigate the effect of different operation variables in the hydrogenolysis of glycerol to 1-propanol and to develop a simple kinetic model useful for the design of the reactor. For this purpose, a carbon-based composite was impregnated with 4 wt.% of Al(H₂PO₄...

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Autores principales: Gatti, Martín Nicolás, Pérez, Federico Martín, Santori, Gerardo Fabián, Pompeo, Francisco
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Química
glycerol hydrogenolysis
bio-propanol
kinetic model
Ni catalysts
carbon composite
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/160991
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-160991
record_format dspace
spelling I19-R120-10915-1609912023-12-01T20:07:06Z http://sedici.unlp.edu.ar/handle/10915/160991 Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃ Gatti, Martín Nicolás Pérez, Federico Martín Santori, Gerardo Fabián Pompeo, Francisco 2023 2023-12-01T14:12:56Z en Química glycerol hydrogenolysis bio-propanol kinetic model Ni catalysts carbon composite The aim of the present research is to investigate the effect of different operation variables in the hydrogenolysis of glycerol to 1-propanol and to develop a simple kinetic model useful for the design of the reactor. For this purpose, a carbon-based composite was impregnated with 4 wt.% of Al(H₂PO₄)₃ (CPAl) and used as a support to prepare a Ni catalyst. The support and the catalyst were characterized by BET, XRD, NMR, potentiometric titration, isopropanol decomposition reaction, TEM and TPR analysis. The catalytic tests were carried out at 220–260 °C and 0.5–4 MPa of H₂ initial pressure varying the glycerol concentration in aqueous solutions between 30 and 80 wt.%. The presence of aluminum phosphates in the Ni/CPAl catalyst moderates the surface acidity and the formation of Ni₂P leads to a high selectivity towards 1-propanol. In this sense, the Ni/CPAl catalyst showed total glycerol conversion and 74% selectivity towards 1-propanol at 260 °C and 2 MPa of H₂ initial pressure using 30 wt.% glycerol aqueous solution and 8 h of reaction time. A slight increase in particle size from 10 to 12 nm was observed after a first reaction cycle, but no changes in acidity and structure were observed. Based on these results, a power-law kinetic model was proposed. For glycerol consumption, partial orders of 0.07, 0.68 and −0.98 were determined with respect to glycerol, H₂ and water, and an apparent activation energy of 89 kJ mol⁻¹ was estimated. The results obtained indicate that the model fits the experimental concentration values well and can predict them with an average error of less than 7%. Centro de Investigación y Desarrollo en Ciencias Aplicadas Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
glycerol hydrogenolysis
bio-propanol
kinetic model
Ni catalysts
carbon composite
spellingShingle Química
glycerol hydrogenolysis
bio-propanol
kinetic model
Ni catalysts
carbon composite
Gatti, Martín Nicolás
Pérez, Federico Martín
Santori, Gerardo Fabián
Pompeo, Francisco
Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃
topic_facet Química
glycerol hydrogenolysis
bio-propanol
kinetic model
Ni catalysts
carbon composite
description The aim of the present research is to investigate the effect of different operation variables in the hydrogenolysis of glycerol to 1-propanol and to develop a simple kinetic model useful for the design of the reactor. For this purpose, a carbon-based composite was impregnated with 4 wt.% of Al(H₂PO₄)₃ (CPAl) and used as a support to prepare a Ni catalyst. The support and the catalyst were characterized by BET, XRD, NMR, potentiometric titration, isopropanol decomposition reaction, TEM and TPR analysis. The catalytic tests were carried out at 220–260 °C and 0.5–4 MPa of H₂ initial pressure varying the glycerol concentration in aqueous solutions between 30 and 80 wt.%. The presence of aluminum phosphates in the Ni/CPAl catalyst moderates the surface acidity and the formation of Ni₂P leads to a high selectivity towards 1-propanol. In this sense, the Ni/CPAl catalyst showed total glycerol conversion and 74% selectivity towards 1-propanol at 260 °C and 2 MPa of H₂ initial pressure using 30 wt.% glycerol aqueous solution and 8 h of reaction time. A slight increase in particle size from 10 to 12 nm was observed after a first reaction cycle, but no changes in acidity and structure were observed. Based on these results, a power-law kinetic model was proposed. For glycerol consumption, partial orders of 0.07, 0.68 and −0.98 were determined with respect to glycerol, H₂ and water, and an apparent activation energy of 89 kJ mol⁻¹ was estimated. The results obtained indicate that the model fits the experimental concentration values well and can predict them with an average error of less than 7%.
format Articulo
Articulo
author Gatti, Martín Nicolás
Pérez, Federico Martín
Santori, Gerardo Fabián
Pompeo, Francisco
author_facet Gatti, Martín Nicolás
Pérez, Federico Martín
Santori, Gerardo Fabián
Pompeo, Francisco
author_sort Gatti, Martín Nicolás
title Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃
title_short Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃
title_full Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃
title_fullStr Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃
title_full_unstemmed Glycerol Hydrogenolysis to Bio-Propanol: Catalytic Activity and Kinetic Model for Ni/C Modified with Al(H₂PO₄)₃
title_sort glycerol hydrogenolysis to bio-propanol: catalytic activity and kinetic model for ni/c modified with al(h₂po₄)₃
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/160991
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AT perezfedericomartin glycerolhydrogenolysistobiopropanolcatalyticactivityandkineticmodelfornicmodifiedwithalh2po43
AT santorigerardofabian glycerolhydrogenolysistobiopropanolcatalyticactivityandkineticmodelfornicmodifiedwithalh2po43
AT pompeofrancisco glycerolhydrogenolysistobiopropanolcatalyticactivityandkineticmodelfornicmodifiedwithalh2po43
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