Studies on the Alkylation of Isobutane with Butene over WO3/ZrO2 Strong Solid Acid(Ⅰ)──Effect of Preparation, Load of WO3 and Calcination Temperature

Abstract

Abstract: Aseries of WO₃/ZrO₂ strong solid acid prepared under different conditions were studied. Their crystal structures, surface properties and acidities were determined by means of XRD, DTA TG, H₂ TPR, Laser Raman and acidity measurements. The results revealed that ZrO₂ in WO₃/ZrO₂ existed mainly in tetragonal phase, the addition of WO₃ plays an important role to stablize tetragonal phase of ZrO₂ and thus the catalyst had a considerable surface area. WO₃ in WO₃/ZrO₂ was dispersed and crystalized in WO₃ crystalite on ZrO₂ surface and partly reacted with ZrO₂ to form the bond of Zr—O—W, which acts as the strong solid acid site. The catalytic properties of WO₃/ZrO₂ strong solid acid for alkylation of iso-butane with butene under the different conditions were investigated. They had a better reaction performance than other strong solid acids, a parallel relationship could be drawn between the catalytic activity and the amount of acid sites as well as the acidic strength of the catalysts.

Key words: Strong solid acid, Isobutane/butene, Alkylation, WO₃/ZrO₂

CLC Number:

O643.1

TrendMD:

SUN Wen-Dong, ZHAO Zhen-Bo, CHU Wen-Ling, GUO Chuan, YE Xing-Kai, WU Yue . Studies on the Alkylation of Isobutane with Butene over WO₃/ZrO₂ Strong Solid Acid(Ⅰ)──Effect of Preparation, Load of WO₃ and Calcination Temperature[J]. Chem. J. Chinese Universities, 2000, 21(3): 448.

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Studies on the Alkylation of Isobutane with Butene over WO₃/ZrO₂ Strong Solid Acid(Ⅰ)──Effect of Preparation, Load of WO₃ and Calcination Temperature

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