Two series of pure nanosized ZSM-22 zeolites (Z-22 (xD) and Z-22 (xS)) with different SiO₂/Al₂O₃ molar ratios are synthesized with 1,6-diaminohexane (DAH) template by the hydrothermal method under dynamic and static crystallization conditions, respectively. The effects of crystallization conditions on the characteristic properties of ZSM-22 zeolites are investigated by XRD, SEM, HR-TEM, N₂ adsorption, ²⁹Si and ²⁷Al MAS NMR, NH₃-TPD, Py-IR and H₂ chemisorption measurements. The results show that Z-22 (xD) samples reveal smaller crystal size, larger mesoporosity, weaker Brønsted acid strength and lower Brønsted acid density compared with Z-22 (xS) samples. The Pd/Z-22 (xD) and Pd/Z-22 (xS) bifunctional catalysts are prepared by loading 0.5 wt% Pd on the corresponding zeolite samples, respectively, and the catalytic performance over all bifunctional catalysts is tested in the hydroisomerization of n-decane. The catalytic test results indicate that the Pd/Z-22 (xD) catalysts show higher selectivity for both mono-branched and multi-branched iso-decanes than those of Pd/Z-22 (xS) catalysts, because of the smaller crystal size and lower Brønsted acidity. Therefore, the dynamic hydrothermal crystallization is an effective way to synthesize ZSM-22 zeolites with improved catalytic behaviors for the n-alkane hydroisomerization.

用1,6-二氨基己烷（DAH）模板合成了具有不同SiO ₂ / Al ₂ O ₃摩尔比的两个系列的纯纳米ZSM-22沸石（Z-22（x D）和Z-22（x S））。分别在动态和静态结晶条件下进行水热法。通过XRD，SEM，HR-TEM，N ₂吸附，²⁹ Si和²⁷ Al MAS NMR，NH ₃ -TPD，Py-IR和H ₂化学吸附测量研究了结晶条件对ZSM-22沸石特征性能的影响。。结果表明Z-22（xD）样品与Z-22（x S）样品相比，具有较小的晶体尺寸，较大的介孔率，较弱的Brønsted酸强度和较低的Brønsted酸密度。Pd / Z-22（x D）和Pd / Z-22（x S）双功能催化剂是通过分别在相应的沸石样品上负载0.5 wt％的Pd制备的，并且在该催化剂中测试了所有双功能催化剂的催化性能。正癸烷的加氢异构化。催化测试结果表明，Pd / Z-22（x D）催化剂对单支和多支异癸烷的选择性均高于Pd / Z-22（xS）催化剂，因为较小的晶体尺寸和较低的布朗斯台德酸度。因此，动态水热结晶法是合成具有改进的正链烷烃加氢异构化催化行为的ZSM-22沸石的有效方法。