Room Temperature Ethene to Propene using a Cascade of Solid-State Molecular Organometallic Catalysts скачать в хорошем качестве

Room Temperature Ethene to Propene using a Cascade of Solid-State Molecular Organometallic Catalysts

Presentation given by Dr. Kris Altus at the UK Catalysis Hub summer conference 2025. Propene is a key platform chemical in the global supply chain of commodity chemicals, used, for example, in the synthesis of polypropene, polyurethanes and polypropionitrile. Current industrial propene manufacturing processes rely on unselective and energy-intensive catalytic steam cracking of naptha or shale gas. A more attractive route is the ethene to propene reaction (ETP) which offers excellent atom economy and favourable thermodynamics. The potential use of bio-ethene as a feedstock also makes the ETP process attractive in terms of sustainability. We show now that a tandem catalytic ensemble of solid-state molecular organometallic (SMOM) crystalline pre-catalysts can be deployed under batch or flow conditions for the ethene to propene process (ETP). These catalysts operate at ambient temperature and low pressure, via sequential ethene dimerisation, butenes isomerisation and cross-metathesis. Under flow conditions the on-stream ethene conversion (55 %), initial propene selectivity (92 %), stability (71 % selectivity after 7 h) and low temperature/pressures are competitive with the best-in-class heterogeneous systems.