[EN] Light alkenes oligomerization, performed in the presence of heterogeneous acid catalysts, is an interesting alternative for the production of clean liquid fuels. The process, when catalyzed by zeolites, is flexible ...[+]
[EN] Light alkenes oligomerization, performed in the presence of heterogeneous acid catalysts, is an interesting alternative for the production of clean liquid fuels. The process, when catalyzed by zeolites, is flexible and can be directed to the formation of oligomers in the gasoline, jet fuel, or diesel range by adjusting the reaction conditions and the zeolite's structure. Herein we show how reducing the crystal size of large-pore Beta zeolites down to 10-15 nm and controlling the number and strength distribution of their Bronsted acid sites leads to highly active and stable catalysts, selective to true oligomers within the naphtha and, especially, the diesel range. The shorter diffusion path lengths in the smaller crystallites and the reduced Bronsted acid site density of the two nanosized beta zeolites (10-15 nm) synthesized with Si/Al = 15 lead to 1-pentene conversion above 80% during the 6 h time on stream (TOS) at a space time (W/F) of 2.8 g.h.mol(-1). This value is higher than the olefin conversion obtained for a commercial nanobeta (30 nm) at a 3-fold space time of 9.1 g.h.mol(-1).[-]
info:eu-repo/grantAgreement/MINECO//SEV-2016-0683/ info:eu-repo/grantAgreement/EC/H2020/671093/EU/MATching zeolite SYNthesis with CATalytic activity/ info:eu-repo/grantAgreement/MINECO//MAT2015-71261-R/ES/DISEÑO RACIONAL DE MATERIALES ZEOLITICOS CON CENTROS METALICOS PARA SU APLICACION EN PROCESOS QUIMICOS SOSTENIBLES, MEDIOAMBIENTALES Y ENERGIAS RENOVABLES/ info:eu-repo/grantAgreement/MINECO//CTQ2015-70126-R/ES/DISEÑO DE CATALIZADORES ZEOLITICOS PARA LA OPTIMIZACION DE PROCESOS QUIMICOS DE INTERES INDUSTRIAL/
Agradecimientos:
Financial support by the Spanish Government-MINECO through "Severn Ochoa" (SEV-2016-0683), MAT2015-71261-R and CTQ2015-70126-R, by the Fundacion Ramon Areces through a research project within the "Life and Materials Sciences" ...[+]
Financial support by the Spanish Government-MINECO through "Severn Ochoa" (SEV-2016-0683), MAT2015-71261-R and CTQ2015-70126-R, by the Fundacion Ramon Areces through a research project within the "Life and Materials Sciences" program, and by the European Union through ERC-AdG-2014-671093-Syn-CatMatch is acknowledged. M.R.D-R. acknowledges "La Caixa-Severo Ochoa" International PhD Fellowships (call 2015). The Electron Microscopy Service of the Universitat Politecnica de Valencia is acknowledged for their help in sample characterization.[-]