Direct synthesis of a 9×10 member ring zeolite (Al-ITQ-13): A highly shape-selective catalyst for catalytic cracking
Direct synthesis of a 9×10 member ring zeolite (Al-ITQ-13): A highly shape-selective catalyst for catalytic cracking
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DOI：
10.1016/j.jcat.2005.11.038
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发表时间：
2006-02
影响因子：
7.3
通讯作者：
Rafael Castañeda;A. Corma;V. Fornés;Joaquín Martínez‐Triguero;S. Valencia
中科院分区：
文献类型：
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作者：
Rafael Castañeda;A. Corma;V. Fornés;Joaquín Martínez‐Triguero;S. Valencia
找到了一条合成ITQ-13沸石的合成路线。ITQ-13是一种含有9元和10元环孔的三向中孔沸石，它允许通过直接合成引入骨架铝。结果表明，ITQ-13也可以在无氟介质中制备。直接合成的含ITQ-13的Al样品具有与ZSM-5相同甚至更强的酸性中心。与ZSM-5分子筛相比，ITQ-13分子筛具有较强的电场梯度和较小的孔径，因此具有较强的酸性和择形能力，从而提高了减压汽油裂解过程中丙烯的产率。
A synthesis route for preparing ITQ-13, a tridirectional medium-pore zeolite containing 9- and 10-member ring pores, has been found that allows the introduction of framework Al by direct synthesis. It has been shown that ITQ-13 can also be prepared in a fluoride-free media. The directly synthesized Al containing ITQ-13 sample presents acid sites as strong or even stronger than ZSM-5. The strong electric field gradient in ITQ-13 and the smaller pore dimensions are responsible for the strong acidity and shape selectivity that increases the production of propylene during the cracking of vacuum gasoil compared with ZSM-5.