Unraveling templated-regulated distribution of isolated SiO₄ tetrahedra in silicoaluminophosphate zeolites with high-throughput computations.

ABSTRACT: Silicoaluminophosphate (SAPO) zeolites are well-known catalytic materials because of the mild acidity originating from the isolated SiO₄ tetrahedra in their frameworks. Regulating the distribution of isolated SiO₄ tetrahedra in SAPO zeolites is formidably challenging because SiO₄ tetrahedra tend to agglomerate to form Si islands and the isolated SiO₄ tetrahedra are difficult to determine using conventional characterization techniques. Here we synthesized Si-island-free SAPO-35 zeolites by using N-methylpiperidine as a new template, which exhibited excellent thermal stability compared to conventional SAPO-35 zeolites and a substantially improved methanol-to-olefins catalytic lifetime even comparable to that of commercial SAPO-34 zeolites. M

SUBMITTER: Li Y 

PROVIDER: S-EPMC9477200 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature