Abstract

The processes of converting propane-butane and propane-propylene fractions into aromatic hydrocarbons on zeolite catalysts modified by the introduction of Zn, La, Fe, Co, and phosphorus has been investigated. The behavior of catalysts in the processing of light hydrocarbons depends on the structure and state of active centers. Physicochemical characteristics of the developed catalysts have been investigated. The highest yield of aromatic hydrocarbons has been observed on the Zn-La-Fe-P-ZSM-Al₂O₃ catalyst, where their yield reaches 52.6% in processing the propane-butane fraction at 600°C, while the selectivity for aromatic hydrocarbons is 64.6%. When the propane-propylene fraction is processed in the temperature range of 350–600°C, the yield of aromatic hydrocarbons on the Zn-La-Fe-P-ZSM-Al₂O₃ catalyst is significantly higher than in other investigated catalysts. A comparison of the results of processing propane-butane and propane-propylene fractions has shown that the yield of the aromatic hydrocarbons is higher when using propane-propylene fractions. For example, at a temperature of 550°C on the Zn-La-Fe-P-ZSM-Al₂O₃ catalyst, the liquid phase yield when processing the propane-butane fraction is 43.6% and the propane-propylene fraction is 59.1% at a conversion rate of 70.2 and 88.3, respectively.

中文翻译：

---

低分子量烃在改性沸石催化剂上的芳构化

摘要

研究了在通过引入 Zn、La、Fe、Co 和磷改性的沸石催化剂上将丙烷-丁烷和丙烷-丙烯馏分转化为芳烃的过程。轻烃加工中催化剂的行为取决于活性中心的结构和状态。已研究开发的催化剂的物理化学特性。在 Zn-La-Fe-P-ZSM-Al ₂ O ₃上观察到最高的芳烃产率在 600°C 下处理丙烷-丁烷馏分时，它们的收率达到 52.6%，而对芳烃的选择性为 64.6%。当丙烷-丙烯馏分在 350-600°C 的温度范围内加工时，Zn-La-Fe-P-ZSM-Al ₂ O ₃催化剂上芳烃的产率明显高于其他研究的催化剂。丙烷-丁烷和丙烷-丙烯馏分的加工结果的比较表明，当使用丙烷-丙烯馏分时，芳烃的产率更高。例如，在 550°C 的温度下，Zn-La-Fe-P-ZSM-Al ₂ O ₃ 催化剂处理丙烷-丁烷馏分时液相产率为43.6%，丙烷-丙烯馏分在转化率分别为70.2和88.3时的液相产率为59.1%。