Fate of Brønsted Acid Sites and Benzene‐Based Carbenium Ions During Methanol‐to‐Olefin Conversion on SAPO‐34

Abstract

High on speed: Brønsted acid sites and polyalkylbenzenium ions on SAPO-34 applied as catalyst for the methanol-to-olefin conversion for different times-on-stream were investigated by using a method consisting of ammonia adsorption and 1H high-speed MAS NMR spectroscopy. The selectivity of SAPO-34 to light olefins correlates with the number of accessible Si(OH)Al groups and polyalkylbenzenium ions. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.