Uncovering the role of Lewis and Brønsted acid sites in perforated SAPO-34 with an enhanced lifetime in methanol conversion to light olefins
Mohammad Ghavipour, Tiago J. Goncalves, Ralph Al Hussami, Ranjan Roy, Samira Siahrostami, Jan Kopyscinski
Abstract
Perforated SAPO-34 by alkali post-treatment lasts longer in the MTO reaction. However, based on the TGA-TPO, GC-MS, 13 C-NMR tests and DFT calculations, alteration in acid sites results in lower light olefins selectivity.
Topics & Concepts
ChemistryMethanolSelectivityLewis acids and basesAlkali metalBrønsted–Lowry acid–base theoryPhotochemistryCatalysisOrganic chemistryZeolite Catalysis and SynthesisChemical Synthesis and CharacterizationCrystal Structures and Properties