European Journal of Inorganic Chemistry
European Journal of Inorganic Chemistry
5 years ago

Organic structure-directing agents in SAPO synthesis: the case of 2-ethyl-1,3,4-trimethylimidazolium

Sibele B. C. Pergher, Paloma Vinaches
Structure-directing is a key topic in zeolite synthesis. In this article the organic cation 2-ethyl-1,3,4-trimethylimidazolium has been studied for the first time in the context of SAPO synthesis. The chosen conditions were concentrated gels and fluoride media. To understand the main products, CHA and LTA zeotypes, several statistical calculi were performed and showed that the structure-direction of the LTA zeotype was mainly due to the organic cation. In the case of the SAPO-CHA, temperature and a combination of dilution and time of synthesis also influenced the apparition of this phase. CHA zeotype was deeply studied by other techniques, such as thermogravimetry, HPDEC MAS NMR or nitrogen sorption. It was calculated that this zeotype contained one cation per unit cell and observed that the fluoride also directed the structure. Silicon in SAPO-CHA was in three states (SiO(4X), SiO(3X) and SiO(1X)), aluminium was found in tetrahedral and octahedral coordination, and phosphorous was also tetrahedral. The textural analysis confirmed the obtention of a microporous material with 510 m2g-1 BET surface and 110 m2g-1 external surface.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201701002

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.