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Effect of the Vanadium and Titanium Substitution Over an Antimony-based Mixed Oxide Catalysts for Propane Amoxidation to Acrylonitril

Anita Ramli, and Asna Rasyidah Abdul Hamid, and Faridah Manafi, and Suhaina Ibrahim, (2007) Effect of the Vanadium and Titanium Substitution Over an Antimony-based Mixed Oxide Catalysts for Propane Amoxidation to Acrylonitril. Malaysian Journal of Analytical Sciences, 11 (1). pp. 166-172. ISSN 13942506

Full text not available from this repository.

Official URL: http://pkukmweb.ukm.my/~mjas/v11_n1/25_433C5_IR_Iz_Anita-1.pdf

Affiliations

SIRIM Berhad. Advanced Materials Research Centre (AMREC)
Universiti Kebangsaan Malaysia, Faculty of Sciences and Technology, School of Chemical Sciences and Food Technology
SIRIM Berhad. Advanced Materials Research Centre (AMREC)
SIRIM Berhad. Advanced Materials Research Centre (AMREC)

Abstract

Antimony (Sb) oxide is known to be the active phase for the ammoxidation of propane to acrylonitrile (ACN). The influenced of V and/or Ti on the physicochemical properties of Sb-based mixed oxide catalysts were studied using catalysts prepared by slurry method. The dried precursor was calcined in air at 350-600 oC for a total of 10 h. The active phase in Sbpromoted catalysts were determined using X-ray Diffraction (XRD) while the changes in microstructure of these catalysts were studied using physical adsorption of nitrogen gas. The catalytic activity of these catalysts were tested in a fixed-bed reactor with online GC at 420 oC with reaction feed (%v) of 5.8:7:17.4 for propane, ammonia and oxygen, respectively. Results show that promotional of Sb with V and/or Ti has an effect on the chemical environment of the Sb-mixed oxide catalysts, leading to differences in catalytic activity of these catalysts.


Logam Antimoni (Sb) oksida telah dikenali sebagai komponen aktif di dalam mangkin yang digunakan untuk tindak balas pengammoniaan propana bagi penghasilan akrilonitril (ACN). Dalam penyelidikan ini, kesan penambahan logam dopan seperti V dan/atau Ti ke atas sifat fizik dan kimia mangkin oksida campuran logam Antimoni dikaji dengan menggunakan keadah ‘slurry’. Precursor mangkin dikeringkan di dalam oven sebelum melalui proses pengkalsinan di dalam udara pada suhu di antara 350-600 oC dengan jumlah keseluruhan tempoh pengkalsinan selama 10 jam. Fasa aktif campuran mangkin Sb dicirikan menggunakan teknik Pembelauan Sinar-X (XRD) di samping jumlah luas permukaan mangkin ditentukan melalui teknik Penjerapan Fizik (BET) dengan menggunakan gas nitrogen. Aktiviti mangkin diuji menggunakan reaktor padatan bendalir yang disambung terus kepada kromatografi gas (GC) dengan nisbah kadar suapan iaitu 5.8:7:17.4 (%v)bagi propana, ammonia dan oksigen. Hasil analisis menunjukkan penambahan logam dopan V dan/atau Ti kepada logam Sb menunjukkan kesan kimia pada mangkin oksida campuran logam Antimoni, seterusnya menunjukkan perubahan dalam pengaktifan mangkin.

Item Type:Journal
Additional Information:Funded by the grant obtained from the Ministry of Science, Technology & Innovation Malaysia (MOSTI), IRPA 03-01-01-0063-PR0072/08-01.
Keywords:Ammoxidation of propane; Acrylonitrile; Antimony; Vanadium; Titanium.
Subjects:Q Science, Computer Science
ID Code:1036

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