Suchergebnisse

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. ; This work is supported by National Key Research and Development Program of China (2017YFB0702803), National Natural Science Foundation of China (21703203, 21673205, 21835002 and 21875140), Shanghai Pujiang Program (17PJ1406400), and the Young Elite Scientist Sponsorship Program by CAST (2017QNRC001). This work is partially supported by CħEM, SPST, ShanghaiTech (Grant 02161943), the Spanish Government‐MICINN through "Severo Ochoa" (SEV 2012‐0267) and RTI2018‐101033‐B‐I00, and the European Union through ERC‐AdG‐2014‐671093 (SynCatMatch). This work was also supported by INCOE program of BASF SE.