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文章编号: 1672-6987(2025)04-0046-05DOI: 10.16351/j.1672-6987.2025.04.006
刘明祖, 袁冰*, 解从霞, 于凤丽(青岛科技大学 化学与分子工程学院, 山东 青岛 266042)
摘要: 采用MCM-22分子筛催化了α-蒎烯与异丁烯/异丁烷混合气烷基化反应性能,分析了反应体系中的主要反应路线。通过NH4Cl离子交换法和Zn(NO3)2 · 6H2O溶液浸渍法改性的MCM-22的酸中心分布的研究,及其对催化产物分布的影响,发现Brönsted酸中心对异丁烯自烷基化反应有利,而Lewis酸中心有利于抑制对伞花烃的生成。在筛选出最优烷基化反应催化剂6-Zn/MCM-22作用下,α-蒎烯可几乎完全转化,产物中C14组分选择性达36.1%,C20选择性达19.0%,为制备蒎烯基高能量密度燃料提供了基础数据。
关键词: α-蒎烯; MCM-22; Brönsted酸; Lewis酸; 烷基化反应
中图分类号: TQ 426 文献标志码: A
引用格式: 刘明祖, 袁冰, 解从霞, 等. MCM-22分子筛催化α-蒎烯与异丁烯烷基化反应[J]. 青岛科技大学学报(自然科学版), 2025, 46(4): -.
LIU Mingzu, YUAN Bing, XIE Congxia, et al. Alkylation of α-pinene with isobutene catalyzed by MCM-22 zeolite[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2025, 46(4): -.
Alkylation of α-Pinene with Isobutene Catalyzed by MCM-22 ZeoliteLIU Mingzu, YUAN Bing, XIE Congxia, YU Fengli(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: In this paper, the performance of the alkylation of α-pinene with isobutylene/isobutane mixture catalyzed by MCM-22 zeolite was carried out, and the main reaction routes in the reaction system were deduced. The acid sites distribution of MCM-22 modified by NH4Cl ion exchange method or Zn(NO3)2 · 6H2O solution impregnation method, and its effect on the catalytic product distribution were investigated. It was found that the Brönsted acid sites were favorable to the self-alkylation of isobutene/isobutane. While the Lewis acid sites tended to inhibit the formation of p-cymene. With the catalysis of 6-Zn/MCM-22, the optimized catalyst, α-pinene can be almost completely converted, and the selectivity of C14 component in the product reaches 36.1% and C20 selectivity reaches 19.0%, which provides basic data for the preparation of pinene-based high energy density fuels.
Key words: α-pinene; MCM-22; Brönsted acid; Lewis acid; alkylation
收稿日期: 2024-08-24
基金项目: 国家自然科学基金项目(31870554); 中国科学院可再生能源重点实验室开放项目(E129kf0501).
作者简介: 刘明祖(1997—), 男, 硕士研究生. ∗ 通信联系人.