高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (11): 20260235.doi: 10.7503/cjcu20260235

• 物理化学 • 上一篇    下一篇

反相InZrO x /Cu微球@Ga⁃MFI核壳催化剂的构筑及催化CO2加氢制芳烃性能

刘宇川1, 陈思琦1, 刘斌1, 陈思宇1, 于洋1, 王巍1(), 田亚杰2(), 刁振恒1()   

  1. 1.长春工业大学化学工程学院,长春 130012
    2.河南大学能源科学与技术学院,郑州 450046
  • 收稿日期:2026-06-12 出版日期:2026-11-10 发布日期:2026-08-06
  • 通讯作者: 王巍 E-mail:wangwei0211@ccut.edu.cn;yjtian@henu.edu.cn;diaozhenheng@ccut.edu.cn
  • 作者简介:田亚杰, 男, 博士, 副教授, 主要从事绿色化学工程方面的研究. E⁃mail: yjtian@henu.edu.cn
    刁振恒, 男, 博士, 副教授, 主要从事分子筛合成与催化方面的研究. E-mail: diaozhenheng@ccut.edu.cn
    第一联系人:共同第一作者.
  • 基金资助:
    国家自然科学基金(22008012;22008055);吉林省发展和改革委员会项目(2024C020-2)

Inverse InZrO x /Cu@Ga-MFI Core-shell Catalyst for CO2 Hydrogenation to Aromatics

LIU Yuchuan1, CHEN Siqi1, LIU Bin1, CHEN Siyu1, YU Yang1, WANG Wei1(), TIAN Yajie2(), DIAO Zhenheng1()   

  1. 1.School of Chemical Engineering,Changchun University of Technology,Changchun 130012,China
    2.School of Energy Science and Technology,Henan University,Zhengzhou 450046,China
  • Received:2026-06-12 Online:2026-11-10 Published:2026-08-06
  • Contact: WANG Wei E-mail:wangwei0211@ccut.edu.cn;yjtian@henu.edu.cn;diaozhenheng@ccut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22008012;22008055);the Scientific Research Project in the Development and Reform Commission of Jilin Province, China(2024C020-2)

摘要:

构筑金属氧化物加氢位点与分子筛芳构化位点高效耦合的串级催化剂, 是提升CO2加氢制芳烃性能的关键. 本文采用涂覆耦合干胶转化法, 构筑了以InZrO x /Cu多孔微球为内核、 b轴直孔道沿壳层径向择优排列的Ga-MFI分子筛为壳层的核壳催化剂. 结果表明, In的引入促进了Cu-In之间相互作用, 并增强In-Zr氧化物相关缺陷位点的形成, 从而提高CO2吸附活化能力, 促进HCOO*和H2CO*等甲醇生成相关中间体的形成. 外层Ga-MFI壳层可促进含氧中间体扩散, 并通过骨架Ga提供的B酸中心与骨架外GaO x /GaO+物种协同促进脱水、 低聚、 环化及脱氢芳构化. 基于上述结构优势, 制备的核壳催化剂在320 ℃, 3 MPa条件下实现了32.4%的CO2转化率及芳烃45.0%的选择性, 且在100 h稳定性测试中表现出良好的活性保持率. 本研究为CO2加氢制芳烃的空间限域串级催化剂设计提供了新思路.

关键词: InZrO x /Cu反相结构, 核壳催化剂, Ga-MFI分子筛, 催化CO2加氢, 芳烃选择性

Abstract:

Constructing tandem catalysts with efficient coupling between metal-oxide hydrogenation sites and zeolite aromatization sites is crucial for improving CO2 hydrogenation to aromatics. Herein, a core-shell catalyst consisting of porous InZrO x /Cu microspheres as the core and a Ga-MFI zeolite shell with preferential radial alignment of the b-axis straight channels was prepared via a coating-assisted dry-gel conversion method. The results show that the introduction of In promoted Cu-In interactions and enhanced the formation of defect sites associated with In-Zr oxide species, thereby improving CO2 adsorption and activation, as well as facilitating the formation of methanol-related intermediates such as HCOO* and H2CO*. The outer Ga-MFI shell shortened the diffusion path of oxygenate intermediates, and framework Ga-derived Bronsted acid sites and extra-framework GaO x /GaO+ species cooperatively promoted dehydration, oligomerization, cyclization, and dehydroaromatization. Benefiting from these structural features, the core-shell catalyst achieved a CO2 conversion of 32.4% and an aromatic selectivity of 45.0% at 320 ℃ and 3 MPa, and showed no obvious deactivation during a 100 h stability test. This work provides a useful strategy for designing spatially confined tandem catalysts for CO2 hydrogenation to aromatics.

Key words: Inverse InZrO x /Cu structure, Core-shell catalyst, Ga-MFI zeolite, Catalytic hydrogenation of CO2, Aromatics selectivity

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