Enhanced activity of Ru/TiO 2 catalyst using bisupport, bentonite-TiO 2 for hydrogenolysis of glycerol in aqueous media

Noraini Hamzah, Norasikin Mohamad Nordin, Ainol Hayah Ahmad Nadzri, Yah Awg Nik, Mohammad Kassim, Mohd. Ambar Yarmo

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

A combination of bentonite-TiO 2 was used as support to enhance the activity of Ru/TiO 2 catalyst in hydrogenolysis of aqueous glycerol to 1,2-propanediol. A series of bentonite, TiO 2, SiO 2 and Al 2O 3 supported Ru catalyst were fabricated and characterized by XRD, XPS, BET, FESEM-EDX and TEM to establish some physicochemical properties of the catalysts. The activity of the catalysts was tested in glycerol hydrogenolysis reaction and were found to be in the following increasing order: Ru/SiO 2 < Ru/TiO 2 ≈ Ru/Al 2O 3 < Ru/bentonite. In particular, Ru/bentonite catalyst recorded the highest conversion (62.8%) of glycerol (20 wt%) with 80.1% selectivity to 1,2-pronediol at 150°C, 20-30 bar H 2 with a reaction duration of 7 h. The Ru/TiO 2 catalyst exhibited the highest selectivity (83.7%) for hydrogenolysis of glycerol to 1,2-propanediol and with 38.8% conversion only. The activity of Ru/TiO 2 catalyst was enhanced by adding bentonite to the titania support at 1:2 ratio resulting in an 80% increasing the activity from 38.8% to 69.8% under the same optimum condition for Ru/TiO 2 while maintaining an 80% selectivity to 1,2-propanediol. TPD-NH 3 analysis found that mixed support could increase catalyst acidity. CO pulse chemisorption analysis revealed that Ru particles was well dispersed with the smallest average size particles (1.5 nm) which could contribute to high activity of Ru/TiO 2 catalyst for hydrogenolysis of glycerol.

Original languageEnglish
Pages (from-to)133-141
Number of pages9
JournalApplied Catalysis A: General
Volume419-420
DOIs
Publication statusPublished - 29 Mar 2012

Fingerprint

Bentonite
Hydrogenolysis
Glycerol
Catalysts
Propylene Glycol
Catalyst supports
Catalyst selectivity
Carbon Monoxide
Temperature programmed desorption
Chemisorption
Acidity
Energy dispersive spectroscopy
Catalyst activity
X ray photoelectron spectroscopy
Titanium
Particle size
Transmission electron microscopy

Keywords

  • 1,2-Propanediol
  • Bentonite-TiO
  • Glycerol
  • Hydrogenolysis
  • Ruthenium catalyst

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Enhanced activity of Ru/TiO 2 catalyst using bisupport, bentonite-TiO 2 for hydrogenolysis of glycerol in aqueous media. / Hamzah, Noraini; Nordin, Norasikin Mohamad; Nadzri, Ainol Hayah Ahmad; Nik, Yah Awg; Kassim, Mohammad; Yarmo, Mohd. Ambar.

In: Applied Catalysis A: General, Vol. 419-420, 29.03.2012, p. 133-141.

Research output: Contribution to journalArticle

Hamzah, Noraini ; Nordin, Norasikin Mohamad ; Nadzri, Ainol Hayah Ahmad ; Nik, Yah Awg ; Kassim, Mohammad ; Yarmo, Mohd. Ambar. / Enhanced activity of Ru/TiO 2 catalyst using bisupport, bentonite-TiO 2 for hydrogenolysis of glycerol in aqueous media. In: Applied Catalysis A: General. 2012 ; Vol. 419-420. pp. 133-141.
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abstract = "A combination of bentonite-TiO 2 was used as support to enhance the activity of Ru/TiO 2 catalyst in hydrogenolysis of aqueous glycerol to 1,2-propanediol. A series of bentonite, TiO 2, SiO 2 and Al 2O 3 supported Ru catalyst were fabricated and characterized by XRD, XPS, BET, FESEM-EDX and TEM to establish some physicochemical properties of the catalysts. The activity of the catalysts was tested in glycerol hydrogenolysis reaction and were found to be in the following increasing order: Ru/SiO 2 < Ru/TiO 2 ≈ Ru/Al 2O 3 < Ru/bentonite. In particular, Ru/bentonite catalyst recorded the highest conversion (62.8{\%}) of glycerol (20 wt{\%}) with 80.1{\%} selectivity to 1,2-pronediol at 150°C, 20-30 bar H 2 with a reaction duration of 7 h. The Ru/TiO 2 catalyst exhibited the highest selectivity (83.7{\%}) for hydrogenolysis of glycerol to 1,2-propanediol and with 38.8{\%} conversion only. The activity of Ru/TiO 2 catalyst was enhanced by adding bentonite to the titania support at 1:2 ratio resulting in an 80{\%} increasing the activity from 38.8{\%} to 69.8{\%} under the same optimum condition for Ru/TiO 2 while maintaining an 80{\%} selectivity to 1,2-propanediol. TPD-NH 3 analysis found that mixed support could increase catalyst acidity. CO pulse chemisorption analysis revealed that Ru particles was well dispersed with the smallest average size particles (1.5 nm) which could contribute to high activity of Ru/TiO 2 catalyst for hydrogenolysis of glycerol.",
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AU - Hamzah, Noraini

AU - Nordin, Norasikin Mohamad

AU - Nadzri, Ainol Hayah Ahmad

AU - Nik, Yah Awg

AU - Kassim, Mohammad

AU - Yarmo, Mohd. Ambar

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AB - A combination of bentonite-TiO 2 was used as support to enhance the activity of Ru/TiO 2 catalyst in hydrogenolysis of aqueous glycerol to 1,2-propanediol. A series of bentonite, TiO 2, SiO 2 and Al 2O 3 supported Ru catalyst were fabricated and characterized by XRD, XPS, BET, FESEM-EDX and TEM to establish some physicochemical properties of the catalysts. The activity of the catalysts was tested in glycerol hydrogenolysis reaction and were found to be in the following increasing order: Ru/SiO 2 < Ru/TiO 2 ≈ Ru/Al 2O 3 < Ru/bentonite. In particular, Ru/bentonite catalyst recorded the highest conversion (62.8%) of glycerol (20 wt%) with 80.1% selectivity to 1,2-pronediol at 150°C, 20-30 bar H 2 with a reaction duration of 7 h. The Ru/TiO 2 catalyst exhibited the highest selectivity (83.7%) for hydrogenolysis of glycerol to 1,2-propanediol and with 38.8% conversion only. The activity of Ru/TiO 2 catalyst was enhanced by adding bentonite to the titania support at 1:2 ratio resulting in an 80% increasing the activity from 38.8% to 69.8% under the same optimum condition for Ru/TiO 2 while maintaining an 80% selectivity to 1,2-propanediol. TPD-NH 3 analysis found that mixed support could increase catalyst acidity. CO pulse chemisorption analysis revealed that Ru particles was well dispersed with the smallest average size particles (1.5 nm) which could contribute to high activity of Ru/TiO 2 catalyst for hydrogenolysis of glycerol.

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KW - Ruthenium catalyst

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