Key Role of Pore Volume of Zeolite for Selective Production of Propylene from Olefins

沸石孔容对于烯烃选择性生产丙烯的关键作用

• 批准号: 21246120
• 负责人: BABA Toshihide
• 金额: $ 30.2万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21246120/
• 关键词: 触媒反応; 触媒; プロピレン合成; ゼオライト; オレフィン; 反応機構; プロピレン; β切断; 細孔空洞容積; 細孔入り口径; エチレン; ブテン; オクテン

A plausible reaction mechanism for propylene (C_3H_6) production from ethylene (C_2H_4) was investigated, based on the amounts of effluent hydrocarbons and hydrocarbons produced in the pores of various zeolites. Propylene was produced via an oligomerization-cracking mechanism. On the basis of this mechanism, the conversions of C_2H_4, pentenes, and hexenes were examined. The catalytic performance was compared, in order to investigate the role of the pore volume of zeolites with 8-, 10-, and 12-membered rings in the selective production of C_3H_6 . The selectivity for C_3 H_6 was crucially dependent upon the pore volume of the zeolite. Highly selective production of C_3H_6 from olefins (C_2H_4 , pentenes, and hexenes) can be accomplished by employing a new concept: adjusting the pore volume of a zeolite to accommodate the volume of an olefin and/or its carbenium cations, as opposed to a conventional molecular sieve approach. For example, an unimolecular cracking of pentenes into C_3 H_6 and C_2 H_4 involving primary cations can be controlled by the pore volume of a zeolite.

根据流出烃和在不同分子筛孔中生成烃的量，对乙烯（C_2H_4）制丙烯（C_3H_6）的反应机理进行了探讨。丙烯是通过齐聚-裂解机理生产的。在此基础上考察了C_2H_4、戊烯和己烯的转化率。比较了8元环、10元环和12元环分子筛的催化性能，考察了孔容对选择性生成C_3H_6的影响。C_3H_6的选择性主要取决于沸石的孔体积。采用一种新的概念，即通过调节沸石的孔容来容纳烯烃和/或其正碳离子的体积，从而实现从烯烃（C_2H_4、戊烯和己烯）高选择性地生产C_3H_6，这与传统的分子筛方法不同。例如，利用分子筛的孔容可以控制含有伯阳离子的戊烯单分子裂解为C_3H_6和C_2H_4。

项目成果

Comparison of PAHs, nitro-PAHs and oxy-PAHs associated with airborne particulate matter at roadside and urban background sites in downtown Tokyo, Japan

日本东京市中心路边和城市背景点与空气中颗粒物相关的多环芳烃、硝基多环芳烃和氧多环芳烃的比较

• 发表时间: 2010
• 期刊: Polycyclic Aromatic Compounds
• 影响因子: 2.4
• 作者: Yuki Kojima;Koji Inazu;Yoshiharu Hisamatsu;Hiroshi Okochi;Toshihide;Baba;Toshio Nagoya
• 通讯作者: Toshio Nagoya

Effect of morphology and particle size of ZSM-5 on catalytic performance for ethylene conversion and heptane crackingKrishna Reddy Jakkidi

ZSM-5 的形貌和粒径对乙烯转化和庚烷裂解催化性能的影响Krishna Reddy Jakkidi

• 发表时间: 2012
• 期刊: Toshihide Baba* Journal of Catalysis
• 作者: Ken Motokura;To-ru Koyama;Akimitsu Miyaji
• 通讯作者: Akimitsu Miyaji

Key role of the pore volume of zeolite for selective production of propylene from olefins.

• DOI: 10.1039/b921927g
• 发表时间: 2010-03
• 期刊: Physical chemistry chemical physics : PCCP
• 作者: To-ru Koyama;Y. Hayashi;Hironori Horie;S. Kawauchi;A. Matsumoto;Y. Iwase;Y. Sakamoto;A. Miyaji

Changes in concentration levels of polycyclic aromatic compounds associated with airborne particulate matter in downtown Tokyo after introducing government diesel vehicle controls

实行政府柴油车管制后，东京市中心与空气颗粒物相关的多环芳香族化合物浓度水平的变化

• 发表时间: 2010
• 期刊: Asian Journal of Atmospheric Environment
• 影响因子: 1.5
• 作者: Yuki Kojima;Koji Inazu;Yoshiharu Hisamatsu;Hiroshi Okochi;Toshihide;Baba;Toshio Nagoya
• 通讯作者: Toshio Nagoya

Selective production propylene from olefins over zeolites

通过沸石从烯烃选择性生产丙烯

• 发表时间: 2010
• 作者: Yasuyoshi Iwase;Akimitsu Miyaji;Ken Motokura;To-ru Koyama;Toshihide Baba
• 通讯作者: Toshihide Baba