3 years ago

Catalytic cracking of propane over impregnated mesoporous ZSM-5: A strategy to change product distribution by sequential modification

Catalytic cracking of propane over impregnated mesoporous ZSM-5: A strategy to change product distribution by sequential modification
ZSM-5 was subjected to two different modifications, namely mesopore creation with 0.2 m NaOH and metal impregnation with 10 wt% of La or Cu, with particular emphasis on the sequence of these modifications. Alkali treatment of ZSM-5 led to extraction of silica and alumina, resulted in loss of strong acid sites, and enhanced accessibility. Furthermore, acidity could be regulated by impregnation with metals. High olefin selectivity (68%), optimal propylene to ethylene ratio (P/E = 1.20), and reasonable stability were obtained over a catalyst produced by a Desilication–Impregnation Sequence (DIS) (AT-10La-ZSM-5). Modification of ZSM-5 by reverse Impregnation–Desilication Sequence (IDS) decreased selectivity, considerably. The modification sequence thus appears to be a key factor in determining the product distribution, and we propose that it may provide a facile new method to control the reaction path.

Publisher URL: www.sciencedirect.com/science

DOI: S1387181117304900

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.