高等学校化学学报2012，Vol.33Issue(9)：2061-2066,6.DOI:10.3969/j.issn.0251-0790.2012.09.033
微乳液法制备Pt-S2O2-8/ZrO2-Al2O3型固体超强酸催化剂及其异构化性能
Preparation of Pt-S2O2-8/ZrO2-Al2O3 Catalyst by Microemulsion Method and Its Performance for Isomerization
摘要
Abstract
Pt-S2O2-8~/ZrO2-Al2O3(Pt-SZA-M) solid superacid catalyst was prepared by microemulsion method. The isomerization performance of catalysts prepared with the microemulsion method and dipping method was compared with n-pentane isomerization as a probe reaction. The catalysts were characterized by XRD, FTIR, BET, TG, TPR and TEM. The results showed that compared with the Pt-SZA catalyst, the Pt particles on Pt-SZA-M were smaller(4. 5 ran) and more uniform; the specific surface area of Pt-SZA-M was 109. 6 mVg, which was 15.4% higher than that of Pt-SZA (95.0 m2/g). The initial reduction temperature of Pt-SZA-M was decreased by 10—20 ℃ compared with that of Pt-SZA, which indicated that loading Pt by microemulsion method could improve the oxidative activity of catalyst and enhance the dissociation adsorption ability of H2 on the surface of catalyst. The activity test of isomerization performance indicated that compared to the Pt-SZA, the activity of isomerization of the Pt-SZA-M under low temperature was significant improved, at reaction temperature of 230 ℃ , pressure of 2.0 MPa, hydrogen/hydrocarbon molar ratio of 4 : 1 and weight hourly space velocity(WHSV) of 1.0 h-1, the isopentane yield was 60.8%. The isopentane yield was stabilized in ca. 58. 0% and the selectivity was higher than 95. 0% within 100 h.关键词
固体超强酸/微乳液法/异构化/Pt/S2O2-8/ZrO2-Al2O3Key words
Solid superacid/ Microemulsion/ Isomerization/ Pt/ S2O2-8/ ZrO2-Al2O3分类
化学化工引用本文复制引用
宋华,石洋,宋华林..微乳液法制备Pt-S2O2-8/ZrO2-Al2O3型固体超强酸催化剂及其异构化性能[J].高等学校化学学报,2012,33(9):2061-2066,6.基金项目
中国石油天然气股份有限公司科技风险创新究项目(批准号:07-06D-01-04-03-02)资助. （批准号:07-06D-01-04-03-02）
