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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
WO3 / ZrO2, SO42 - / ZrO2, Mo2O3 / ZrO2 solid strong acid catalysts supported on ultrafine ZrO2 were prepared and characterized by XRD, DTA-TG, H2-TPR and NH3-TPD Type structure, surface state and acidity.The results show that the ultrafine ZrO2 and its catalyst mainly exist in the form of T-phase, compared with the similar catalysts usually prepared with Zr (OH) 4 as the carrier, the T- Although the proportion of crystalline phase decreased, it had larger specific surface area, acid strength and ability to support metal oxides. The acid strength increased with the increase of calcination temperature, which indicated that the surface state also changed greatly. Alkylation of isobutane-butene on a solid strong acid catalyst supported on ultrafine ZrO 2 was studied. Compared with the catalyst prepared from Zr (OH) 4 supported catalyst, Conversion, alkylation products, C5 ~ C7 more cleavage products, so that the selectivity of C80 decreased