通过水热法改性氢氧化锆制备了Pt-SO2-4/ZrO2固体酸催化剂,并用低温氮吸附、X射线衍射、扫描电镜和差热分析等技术考察了氢氧化锆水热处理时的温度对Pt-SO2-4/ZrO2固体酸物化性能及催化性能的影响,对水热改性的作用机理进行了讨论. 在连续微反-色谱装置上评价了催化剂对正戊烷异构化反应的催化活性. 用水热法对氢氧化锆粒子进行处理,可以使其形成较稳固的孔结构. 这种孔结构具有较高的热稳定性,可有效阻止焙烧过程中氧化锆粒子的烧结长大. 与室温老化制备的催化剂相比,由在90～110 ℃下水热改性氢氧化锆所制备的催化剂的比表面积、硫含量和孔体积均有显著的提高,但催化剂的TOF下降; 水热温度高于130 ℃时,催化剂的TOF升高. 实验结果表明,由水热法得到的晶态水合氧化锆也可以制备SO2-4/ZrO2类固体酸.
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