Lei Chi, Dong Zhuoya, Martínez Cristina, Martínez-Triguero Joaquín, Chen Wei, Wu Qinming, Meng Xiangju, Parvulescu Andrei-Nicolae, De Baerdemaeker Trees, Müller Ulrich, Zheng Anmin, Ma Yanhang, Zhang Weiping, Yokoi Toshiyuki, Marler Bernd, De Vos Dirk E, Kolb Ute, Corma Avelino, Xiao Feng-Shou
Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou, 310007, P. R. China.
School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China.
Angew Chem Int Ed Engl. 2020 Sep 1;59(36):15649-15655. doi: 10.1002/anie.202003282. Epub 2020 Jun 30.
There are a large number of zeolites, such as ITH, that cannot be prepared in the aluminosilicate form. Now, the successful synthesis of aluminosilicate ITH zeolite using a simple cationic oligomer as an organic template is presented. Key to the success is that the cationic oligomer has a strong complexation ability with aluminum species combined with a structural directing ability for the ITH structure similar to that of the conventional organic template. The aluminosilicate ITH zeolite has very high crystallinity, nanosheet-like crystal morphology, large surface area, fully four-coordinated Al species, and abundant acidic sites. Methanol-to-propylene (MTP) tests reveal that the Al-ITH zeolite shows much higher selectivity for propylene and longer lifetime than commercial ZSM-5. FCC tests show that Al-ITH zeolite is a good candidate as a shape-selective FCC additive for enhancing propylene and butylene selectivity.
有大量的沸石，如ITH，无法以硅铝酸盐的形式制备。现在，展示了使用一种简单的阳离子低聚物作为有机模板成功合成硅铝酸盐ITH沸石的方法。成功的关键在于，该阳离子低聚物与铝物种具有很强的络合能力，同时对ITH结构具有类似于传统有机模板的结构导向能力。硅铝酸盐ITH沸石具有非常高的结晶度、纳米片状晶体形态、大表面积、完全四配位的铝物种以及丰富的酸性位点。甲醇制丙烯（MTP）测试表明，Al-ITH沸石对丙烯的选择性远高于商业ZSM-5，且寿命更长。催化裂化（FCC）测试表明，Al-ITH沸石是一种很好的形状选择性FCC添加剂候选物，可提高丙烯和丁烯的选择性。
