Zeolites with various pore structures and sizes such as microporous ZSM-5, desilicated ZSM-5, Beta zeolite and ZSM-48 were investigated as catalysts in the oligomerization of propylene and 1-hexene to fuel-range hydrocarbons. Mesoporous ZSM-5 was prepared via a post-synthesis alkaline treatment. Physicochemical properties of the zeolite catalysts were characterized by XRD, XRF, SEM, TEM, MAS NMR, BET, and NH₃-TPD techniques to analyze the crystallinity, element composition, morphology, textural properties as well as acidity distribution. The catalyst characterization confirmed that NaOH post-treatment by mild desilication is an effective method to tune the pore structure of medium pore ZSM-5 zeolite by introducing mesoporosity without damaging the microporous structure. Enhanced activity and selectivity to jet fuel/diesel range (C₁₂) products of ˜90% and 55% respectively was achieved over a modified ZSM-5 catalyst at optimum reaction conditions of 220 °C and weight hourly space velocity (WHSV) of 4 h⁻¹ in the oligomerization of 1-hexene. Good selectivity to gasoline-range hydrocarbons with high octane number was achieved over modified ZSM-5 in the oligomerization of propylene. The spent catalysts were characterized by thermogravimetric and NH₃-TPD analyses which confirmed that carbonaceous deposits were prevalent inside the micropores of the catalysts but its effects were less severe on the modified ZSM-5.

研究了具有各种孔结构和大小的沸石，例如微孔ZSM-5，脱硅的ZSM-5，β沸石和ZSM-48，作为丙烯和1-己烯低聚为可燃范围的烃的催化剂。通过合成后的碱处理制备中孔ZSM-5 。用XRD，XRF，SEM，TEM，MAS NMR，BET和NH ₃表征了沸石催化剂的理化性质。-TPD技术，用于分析结晶度，元素组成，形态，质地特性以及酸度分布。催化剂表征证实，通过温和的脱硅进行的NaOH后处理是通过引入介孔性而不损害微孔结构来调节中孔ZSM-5沸石的孔结构的有效方法。在改良的ZSM-5催化剂上，在220°C的最佳反应条件和4的重时空速（WHSV）下，经改性的ZSM-5催化剂，分别获得了约90％和55％的增强活性和对喷气燃料/柴油系列产品（C ₁₂）的选择性。 h ^-1在1-己烯的低聚反应中。在丙烯的低聚反应中，与改性的ZSM-5相比，对具有高辛烷值的汽油范围烃具有良好的选择性。通过热重分析和NH ₃ -TPD分析来表征废催化剂，这证实了碳沉积物在催化剂的微孔内部普遍存在，但是其对改性ZSM-5的影响较小。