Bio-propylene glycol by liquid phase hydrogenolysis of glycerol with Ni/SiO<sub>2</sub>-C catalysts
The development of catalytic materials, hydrothermally stable and selective to the desired products, is still a challenge. The aim of the present work is to prepare a nickel catalyst with a metal loading of 5 wt% Ni supported on a SiO<sub>2</sub>-C composite, to be used in the liquid-pha...
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2017
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/108518 https://www.sciencedirect.com/science/article/abs/pii/S0920586117302225 |
| Aporte de: |
| id |
I19-R120-10915-108518 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ingeniería Ciencias Exactas bio-propylene glycol hydrogenolysis nickel catalysts glycerol |
| spellingShingle |
Ingeniería Ciencias Exactas bio-propylene glycol hydrogenolysis nickel catalysts glycerol Gatti, Martín Nicolás Pompeo, Francisco Santori, Gerardo Fabián Nichio, Nora Nancy Bio-propylene glycol by liquid phase hydrogenolysis of glycerol with Ni/SiO<sub>2</sub>-C catalysts |
| topic_facet |
Ingeniería Ciencias Exactas bio-propylene glycol hydrogenolysis nickel catalysts glycerol |
| description |
The development of catalytic materials, hydrothermally stable and selective to the desired products, is still a challenge. The aim of the present work is to prepare a nickel catalyst with a metal loading of 5 wt% Ni supported on a SiO<sub>2</sub>-C composite, to be used in the liquid-phase glycerol hydrogenolysis reaction. The most active and selective catalyst to 1,2-propylene glycol (1,2-PG) was Ni/SC-095, which presented surface acidity fundamentally represented by the presence of carboxylic groups which promoted the CeO cleavage reactions of the glycerol primary carbon to produce acetol, and subsequently by hydrogenation to produce 1,2-PG.
Concerning the selection of operating conditions, the influence of the most relevant variables of the process were analyzed, i.e., temperature (220–260 °C), glycerol concentration (30–65%), and hydrogen partial pressure (0–4 MPa). The best result was obtained at 260 °C with 30 wt% glycerol, 6 h on reaction and a hydrogen partial pressure of 2 MPa. Under these conditions, selectivities of 77% towards 1,2-PG and 3% to acetol were obtained, with 56% of conversion.
It was demonstrated that there are no important structural changes through the characterization of the used samples. Both the SC-095 support and the Ni/SC-095 catalyst maintained their BET surface area. By XRD and TEM, there could be a slight increase in particle size, which would indicate good resistance to sintering against the severe hydrothermal conditions of this reaction. |
| format |
Articulo Preprint |
| author |
Gatti, Martín Nicolás Pompeo, Francisco Santori, Gerardo Fabián Nichio, Nora Nancy |
| author_facet |
Gatti, Martín Nicolás Pompeo, Francisco Santori, Gerardo Fabián Nichio, Nora Nancy |
| author_sort |
Gatti, Martín Nicolás |
| title |
Bio-propylene glycol by liquid phase hydrogenolysis of glycerol with Ni/SiO<sub>2</sub>-C catalysts |
| title_short |
Bio-propylene glycol by liquid phase hydrogenolysis of glycerol with Ni/SiO<sub>2</sub>-C catalysts |
| title_full |
Bio-propylene glycol by liquid phase hydrogenolysis of glycerol with Ni/SiO<sub>2</sub>-C catalysts |
| title_fullStr |
Bio-propylene glycol by liquid phase hydrogenolysis of glycerol with Ni/SiO<sub>2</sub>-C catalysts |
| title_full_unstemmed |
Bio-propylene glycol by liquid phase hydrogenolysis of glycerol with Ni/SiO<sub>2</sub>-C catalysts |
| title_sort |
bio-propylene glycol by liquid phase hydrogenolysis of glycerol with ni/sio<sub>2</sub>-c catalysts |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/108518 https://www.sciencedirect.com/science/article/abs/pii/S0920586117302225 |
| work_keys_str_mv |
AT gattimartinnicolas biopropyleneglycolbyliquidphasehydrogenolysisofglycerolwithnisiosub2subccatalysts AT pompeofrancisco biopropyleneglycolbyliquidphasehydrogenolysisofglycerolwithnisiosub2subccatalysts AT santorigerardofabian biopropyleneglycolbyliquidphasehydrogenolysisofglycerolwithnisiosub2subccatalysts AT nichionoranancy biopropyleneglycolbyliquidphasehydrogenolysisofglycerolwithnisiosub2subccatalysts |
| bdutipo_str |
Repositorios |
| _version_ |
1764820443768815618 |