中文摘要：

用浸渍法制备了WO3／ZrO2及碱金属K或碱土金属Sr掺杂改性的WO3／ZrO2固体酸催化剂．采用X射线衍射、N2吸附、NH3程序升温脱附和吸附吡啶的红外光谱等技术表征了K或Sr对WO3／ZrO2催化剂结构和表面酸性质的影响．研究了WO3／ZrO2及K或Sr掺杂改性的WO3／ZrO2固体酸对苯与1-己烯烷基化反应的催化性能．考察了催化剂制备条件和反应条件对催化剂活性的影响以及催化剂的重复使用性．结果表明，引入K或Sr可调变WO3／ZrO2固体酸中的ZrO2晶相和固体酸的酸强度、酸量以及Lewis酸中心与Br（oe）nsted酸中心的比值．适量K或Sr掺杂改性可提高WO3／ZrO2催化剂对苯与1-己烯烷基化反应的催化活性和稳定性，在常压和80℃的温和条件下，反应10min后，1-己烯的转化率可达99％，单烷基选择性为100％．该催化剂可多次重复使用，催化活性稳定．

英文摘要：

A series of WO3/ZrO2 and K- or Sr-doped WO3/ZrO2 solid acid catalysts were prepared. The effects of K or Sr modification on the structure, surface acidity, and the catalytic performance of WO3/ZrO2 were studied by powder X-ray diffraction, NH3 temperature-programmed desorption, and pyridine FT-IR methods. The addition of K or Sr to WO3/ZrO2 could change the structure, acid amount, and acid strength distribution of WO3/ZrO2. ZrO2 in WO3/ZrO2 mainly existed as a tetragonal phase, but its content decreased with the addition of K or Sr. The total acid amount, the strong acid sites, and the ratio of Lewis acid sites to Br（oe）hsted acid sites decreased after the addition of K or Sr. The synthesized WO3/ZrO2 and K- or Sr-doped WO3/ZrO2 samples were used in alkylation of benzene with 1-hexene in a liquid phase, and the results showed that the doped WO3/ZrO2 solid acid catalysts with a suitable K or Sr content exhibited much higher catalytic activity and stability than WO3/ZrO2 at 80℃, with the 1-hexene conversion of nearly 99 % and monoalkylbenzene selectivity of 100 %. In a set of reuse experiments, there was no reduction of the catalyst activity, and the monoalkylbenzene selectivity over the reused catalyst was the same as that over the fresh catalyst. These results suggest that the K- or Srdoped WO3/ZrO2 solid acid is a good solid acid catalyst with better catalytic performance for the alkylation of benzene with 1-hexene.