Abstract Zeolite catalysts (ZSM-5) were synthesized using different ratios of structure directing agents (SDA) and Si/Al, and the synthesized ZSM-5 samples were used in the endothermic decomposition reaction of exo-tetrahydrodicyclopentadiene (exo-THDCP). The ZSM-5 synthesized with a 6.0:100 SDA/SiO2 ratio and Si/Al ratio of 20 (S20/P6.0) showed higher mesoporosity than those of the other synthesized and commercial ZSM-5 catalysts. The decomposition reaction of exo-THDCP using the S20/P6.0 catalyst yielded the highest conversion of 58.4% after 65 min, whereas the commercial catalyst rapidly became deactivated and exhibited only 31.2% conversion, which was the same conversion obtained without the catalyst. The coke analysis results indicated that the ratio of mesopore to micropore volume of the catalyst was a major factor in determining the amount of internal and external coke produced in the catalyst. Moreover, the mesopore/micropore volume ratio affected the composition of soluble coke.

中文翻译：

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不同结构导向剂配比的HZSM-5催化剂的制备及其对超临界条件下外型四氢二环戊二烯分解和结焦的影响

摘要 采用不同比例的结构导向剂（SDA）和Si/Al合成沸石催化剂（ZSM-5），并将合成的ZSM-5样品用于外型四氢二环戊二烯（exo-THDCP）的吸热分解反应。以 6.0:100 SDA/SiO2 比和 20 Si/Al 比 (S20/P6.0) 合成的 ZSM-5 显示出比其他合成和商业 ZSM-5 催化剂更高的介孔率。使用 S20/P6.0 催化剂的 exo-THDCP 的分解反应在 65 分钟后产生了 58.4% 的最高转化率，而商业催化剂迅速失活并仅表现出 31.2% 的转化率，这与没有催化剂时获得的转化率相同。焦炭分析结果表明，催化剂的中孔与微孔体积之比是决定催化剂内部和外部焦炭产生量的主要因素。此外，中孔/微孔体积比影响可溶性焦炭的组成。