Preparation Of Nano Solid Acid Catalyst - Butene Alkylation Reaction Of Isobutane

The nanoparticles synthesized in reverse micelle can be loaded on carrier and then act as catalyst in isobutane-butene alkylation, which is helpful to develop environment friendly and easily regenerable solid catalyst.In this paper, WO3/ZrO2 and MoO3/ZrO2 nanoparticles have been synthesized in AOT/isooctane reverse micelle system. For comparison, WO3/ZrO2 and MoO3/ZrO2 prepared by incipient wetness impregnation and sol-gel method are investigated. The ultraviolet visible (UV-Vis) spectra indicated that there is some absorption of nanoparticles in reverse micelle. According to transmission electron microscope (TEM), the particles are nanosized. The size distribution of nanoparticles is narrow and normal distribution. With the increase of Wo and the reactant concentration, the nanoparticle is bigger. As shown in scan electron microscope (SEM) picture, the nanoparticles have aggregated in the powder. In order to prevent the aggregation of nanoparticles, the particles were loaded in Y -A12O3( 100 mesh).All samples have been tested as catalysts for production of alkylate. The conversion of olefins over different samples is varied. The initial conversions of olefins over IM-W and IM-M are high, and then decreased rapidly. The conversions of olefins over WZO and MZO are higher than that of IM-W and IM-M respectively. The conversions of olefins over WZOA and MZOA are higher than those of others. The products over different samples are alike. The changing of catalysts can only vary the ratio of products. For different samples, the yields of Cg are in the following order: IM-W> WZO>WZOA (or IM-M>MZO>MZOA). It could be attributed to the stronger acid strength and the more acid amount of WZOA (or MZOA).Mesoporous materials have received increasing attention for their high BET surface area and regular pore system. Transition metals and transition metal oxides are of particular interest in the synthesis of mesoporous material. In this paper, we try to synthesize mesoporous ZrO2 and WO3/ZrO2 using CTAB as template. By X-ray diffraction analysis, it hasbeen shown that, in the structure of samples, there is phase of tetragonal ZrO2. Nevertheless, no small-angle XRD reflection was observed, which indicated that the pore formation mechanism does not imply bi- or three-dimensional X-ray detectable ordering.