【摘要】 制备了一系列不同焙烧温度的 Zr(SO4) 2 及 Zr(SO4) 2 负载量不同的 Zr(SO4) 2 / Al2 O3(Si O2 )固体强酸催化剂 ,用 XRD、IR、BET、TG- DTA、NH3- TPD、Hamm ett指示剂等方法研究了该催化体系的晶型、结构、比表面、酸量及酸强度随负载量和焙烧温度的变化规律 .将 Zr(SO4) 2 负载在 Al2 O3和 Si O2 两种载体上呈现不同的特性 .在 Al2 O3上明显地延缓了 Zr(SO4) 2 的分解和 Zr O2的晶相转变 .并且使酸量和酸强度有所提高 .研究了异丁烷 -丁烯烷基化反应 ,结果表明 ,对 973和 10 2 3K焙烧的 Zr(SO4) 2 样品 ,活性最好 ,而对 Zr(SO4) 2 / Al2 O3,负载量在 m(Zr(SO4) 2 ) /m(Al2 O3) =0 .5 / 1.0左右时活性最好 .各种样品均具有较高的 C08选择性 .更多还原

【Abstract】 A series of strong solid acid catalysts Zr(SO 4) 2 calcined at different temperatures and supported Zr(SO 4) 2/Al 2O 3(or SiO 2) were prepared. The effects of supporter and calcina tion temperature on the crystal form, structure, specific surface, acid content and acid strength of the catalysts were investigated by XRD, IR, BET, specific surface, TG DTA, NH 3 TPD and the Hammett indicator measurements. The results showed that as a supporter Al 2O 3 could obviously retard the decomposition of Zr(SO 4) 2, crystal phase transform of ZrO 2 and considerably increase the acid content and acid strength of the catalysts. In the alkyla tion of isobutane with butenes the Zr(SO 4) 2 catalyst samples calcined at 913 and 1023 K showed the best activity and for supported catalyst Zr(SO 4) 2/Al 2O 3 the best activity was achieved when m (Zr(SO 4) 2)/ m (Al 2O 3)=0 5~1 0. All of the catalysts revealed good selectivity for C 0 8.更多还原