Abstract
Dua mangkin vanadium–fosforus–oksida (VPO) telah disediakan dengan menggunakan kaedah yang dikenali sebagai medium ‘organik’ dan ‘akueus’. Pencirian mangkin ini telah dilakukan dengan menggunakan luas permukaan BET dan keliangan, analisis gravimetrik terma (TGA/DTG) dan penurunan berprogram suhu (TPR). Hasil kajian menunjukkan mangkin VPO yang disediakan dalam media organik memiliki luas permukaan yang lebih besar, mobiliti oksigen kekisi yang lebih tinggi dan mempunyai tapak penurunan yang lebih banyak. Kata kunci: Vanadium-fosforus-oksida; pengoksidaan butana; penurunan berprogram suhu Two vanadium–phosphorus–oxide (VPO) catalysts were prepared by two different methods known as organic and aqueous medium. Characterization of these catalysts were carried out by BET surface area and porosity, gravimetry thermal analysis (TGA/DTG) and temperature programmed reduction (TPR). The result show that VPO catalyst prepared in organic medium gave larger surface area, higher lattice oxygen mobility and has a greater reduction site. Key words: Vanadium-Phosphorus-Oxide; butane oxidation; maleic anhydride; temperature-programmed reduction.
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