Malaysian Journal of Analytical Sciences, Vol 28 No 2 (2024): 257 - 264

 

SCREENING OF PROMOTED CeO2/Al2O3 CATALYSTS IN AQUEOUS PHASE GLYCEROL REFORMING AND HYDROGENOLYSIS INTO 1,2-PROPANEDIOL

 

(Penyaringan Mangkin Penggalak CeO2/Al2O3 dalam Fasa Akueus Pembaharuan dan Hidrogenolisis Gliserol Kepada 1,2-Propanadiol)

 

Norsahida Azri1,2,3*, Ramli Irmawati 2,3,5*, Rudy Hakim Danial Leong2,3, Usman Idris Nda-Umar2,3,4, Mohd Izham Saiman2,3, Yun Hin Taufiq-Yap 2,3 and G. Abdulkareem-Alsultan2,3.

 

1Preparatory Centre for Science and Technology, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia

2Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

3Catalysis Science and Technology Research Centre (PutraCat), Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

4Department of Chemical Sciences, Federal Polytechnic, PMB 55, Bida, Niger State, Nigeria

5Laboratory of Processing and Product Development, Institute of Plantation Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

 

*Corresponding author: norsahidaazri@ums.edu.my; irmawati@upm.edu.my

 

 

Received: 3 November 2023; Accepted: 16 January 2024; Published:  29 April 2024

 

 

Abstract

A series of promoted CeO2/Al2O3 catalysts (10Cu-90CeO2/Al2O3, 10Ni-90CeO2/Al2O3, 10Co-90CeO2/Al2O3) were synthesized via method of impregnation and later calcined at 600 ℃. Those catalysts were formerly tested for their physico-chemical properties by X-ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR), and NH3-temperature programmed desorption (NH3–TPD). After characterized, it was then evaluated in the performance of catalytic glycerol conversion into 1,2-propanediol; propylene glycol (1,2-PDO; PG) via aqueous phase glycerol reforming and hydrogenolysis route under inert N2 flow. Among the examined catalysts, CeO2/Al2O3 with 10wt% Cu loading (10Cu-90CeO2/Al2O3) showed optimum catalytic activity with 88.5% glycerol conversion (GC) and 35.5% PG selectivity at 300 ℃ reaction temperature, 2 h duration test, 30 cc/min of N2 initial pressure, 0.1 g catalyst dosage and 10wt% glycerol concentration. The high catalytic performance of 10Cu-90CeO2/Al2O3 was owing to the good copper-cerium-alumina interaction via its good metal reducibility at low temperature along with good acid capacity for the reaction.

 

Keywords: copper, cerium, alumina, acid capacity, glycerol conversion

 

Abstrak

Satu siri mangkin penggalak CeO2/Al2O3 (10Cu-90CeO2/Al2O3, 10Ni-90CeO2/Al2O3, 10Co-90CeO2/Al2O3) telah disintesis menggunakan kaedah pegisitepuan lalu dikalsinkan pada 600 ℃. Kesemua mangkin telah dikaji sifat fiziko-kimia dengan menggunakan pembelauan sinar-X (XRD), penuruan suhu terprogram H2 (H2-TPR), dan nyahjerapan suhu terprogram NH3 (NH3-TPD). Ia kemudian dinilai dalam penukaran pemangkinan gliserol kepada 1,2-propanadiol; propilena glikol (1,2-PDO; PG) melalui pendekatan pembaharuan dan hidrogenolisis fasa akueus dibawah aliran N2. Diantara mangkin yang diuji, CeO2/Al2O3 dengan 10wt% muatan Cu (10Cu-90CeO2/Al2O3) telah menunjukkan aktiviti pemangkinan yang optimum dengan 88.5% penukaran gliserol (GC) dan 35.5% keterpilihan PG pada suhu tindak balas 300 ℃, tempoh masa 2 jam, 30 cc/min tekanan awal N2 dan 0.1 g dos mangkin dan 10wt% kepekatan gliserol. Prestasi pemangkinan yang tinggi oleh 10Cu-90CeO2/Al2O3 didorong oleh interaksi baik antara kuprum-ceria-alumina melalui penurunan logam yang baik pada suhu rendah dan kapasiti asid yang sesuai untuk tindak balas. 

 

Kata kunci: kuprum, serium, alumina, kapasiti asid, penukaran gliserol

 

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