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以ＳｉＯ２／Ａｌ２Ｏ３＝２５、３８、４６的ＮａＺＳＭ－５为原料，用ＨＣｌ、ＮＨ４Ｃｌ、ＬａＣｌ３进行改性，并对改性样品进行水热处理（７３０℃、５ｈ、１００％水蒸气）。采用正十六烷裂解反应考察改性样品水热处理后催化性能的差异。结果表明，对硅铝比（ＳｉＯ２／Ａｌ２Ｏ３）相同的ＮａＺＳＭ－５，经ＮＨ４Ｃｌ交换得到的ＨＺＳＭ－５（Ｎ），其活性均高于ＨＣｌ交换的ＨＺＳＭ－５。ＨＺＳＭ－５（Ｎ）的活性以原料ＮａＺＳＭ－５中的ＳｉＯ２／Ａｌ２Ｏ３排序为：ＳｉＯ２／Ａｌ２Ｏ３＝４６＞ＳｉＯ２／Ａｌ２Ｏ３＝２５＞ＳｉＯ２／Ａｌ２Ｏ３＝３８。ＨＺＳＭ－５的活性以原料ＮａＺＳＭ－５中的ＳｉＯ２／Ａｌ２Ｏ３排序为：ＳｉＯ２／Ａｌ２Ｏ３＝４６＞ＳｉＯ２／Ａｌ２Ｏ３＝３８＞ＳｉＯ２／Ａｌ２Ｏ３＝２５。对ＳｉＯ２／Ａｌ２Ｏ３＝２５、２８的ＨＺＳＭ－５（Ｎ）经ＬａＣｌ３改性后活性提高，对ＳｉＯ２／Ａｌ２Ｏ３＝４６的ＨＺＳＭ－５（Ｎ）经ＬａＣｌ３改性后活性不变，但气体选择性下降，汽油选择性提高。
NaZSM-5 with SiO2 / Al2O3 = 25,38,46 was modified with HCl, NH4Cl and LaCl3. The modified samples were hydrothermally treated (730 ℃, 5h, 100% steam). The n-hexadecane cracking reaction was used to investigate the difference of catalytic performance of modified samples after hydrothermal treatment. The results showed that the activity of HZSM-5 (N) obtained by NH4Cl exchange was higher than that of HZSM-5 exchanged with HCl for NaZSM-5 with the same SiO2 / Al2O3 ratio. The activity of HZSM-5 (N) was ranked as SiO2 / Al2O3 in starting material NaZSM-5 as follows: SiO2 / Al2O3 = 46> SiO2 / Al2O3 = 25> SiO2 / Al2O3 = The activity of HZSM-5 was ranked as SiO2 / Al2O3 in raw material NaZSM-5 as follows: SiO2 / Al2O3 = 46> SiO2 / Al2O3 = 38> SiO2 / Al2O3 = 25. The activity of HZSM-5 (N) modified by LaCl3 on SiO2 / Al2O3 = 25,28 was improved. The activity of HZSM-5 (N) modified by LaCl3 on SiO2 / Al2O3 = 46 remained unchanged but the gas selectivity decreased , Petrol selective increase.