The Malaysian Journal of Analytical Sciences Vol 11 No 1 (2007): 166 -172

 

 

EFFECT OF VANADIUM AND TITANIUM SUBSTITUTION OVER AN ANTIMONY-BASED MIXED OXIDE CATALYSTS FOR PROPANE AMMOXIDATION TO ACRYLONITRILE

 

Anita Ramli*1, Asna Rasyidah Abdul Hamid 2, Faridah Manaf1   and Suhaina Mohd. Ibrahim1

 

¹Advanced Materials Research Centre (AMREC), SIRIM Berhad,

Lot 34, Jalan Hi-Tech 2/3, Kulim Hi-Tech Park, 09000 Kulim, Kedah, Malaysia.

²School of Chemical Sciences and Food Technology, Faculty of Science and Technology,

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.

 

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 Sb-promoted 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.

 

Keywords: Ammoxidation of propane; Acrylonitrile; Antimony; Vanadium; Titanium.

 

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