【摘要】 制备了以超细 Zr O2 为载体的 WO3/ Zr O2 、 SO42 - / Zr O2 、 Mo O3/ Zr O2 固体强酸催化剂 ,并用 XRD、 DTA-TG、 H2 - TPR、 NH3- TPD等方法表征了其晶型结构、表面状态和酸性 .结果表明 ,超细 Zr O2 及其催化剂均主要以 T-晶相存在 ,与通常以 Zr(OH) 4为载体制备的同类催化剂相比 ,Zr O2 中的 T-晶相所占比例虽有所下降 ,但具有更大的比表面积、酸强度和对金属氧化物的负载能力 ,且酸强度随焙烧温度升高而增强 ,表明其表面状态亦有较大变化 .研究了以超细 Zr O2 为载体的固体强酸催化剂上 ,异丁烷 -丁烯的烷基化反应 ,与通常以 Zr(OH) 4为载体制得的催化剂相比 ,其具有更好的烯烃转化率 ,在烷基化产物中 ,C5 ～ C7裂解产物较多 ,使 C80的选择性有所下降更多还原

【Abstract】 A series of WO\-3/ZrO\-2 , SO\-4\+\{2-\}/ZrO\-2, and MoO\-3/ZrO\-2 strong solid acids were prepared. Their crystal structure, surface state and acidity were determined by XRD, TG\|DTA, H\-2\|TPR and NH\-3\|TPD. The results revealed that superfine ZrO\-2 mainly exists in tetragonal phase, however, the amount of T \|phase ZrO\-2 decreases, but it has a larger specific area, acid amounts and loading capacity as compared with catalyst prepared by traditional approach using Zr(OH)\-4 as carrier. Acid strength of the catalyst increases with the calcination temperature, which indicates that its surface state has changed significantly. The isobutane alkylation of n \|butene catalysed by various catalysts has been investigated. Experimental results indicated that better olefin conversions are reached than that over catalyst prepared by traditional \{Zr(OH)\-4\} as carriers. C\-8\+0 selectivity decreases due to the formation of more cracking products of C\-5~C\-7.更多还原