Efficient Oligomerization of Pentene into Liquid Fuels
on Nanocrystalline Beta Zeolites
Version 2 2017-08-18, 19:41
Version 1 2017-08-18, 19:36
Posted on 2017-08-18 - 19:41
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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 Brønsted 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
Brønsted 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.
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Díaz-Rey, M. Rocío; Paris, Cecilia; Martínez-Franco, Raquel; Moliner, Manuel; Martínez, Cristina; Corma, Avelino (2017). Efficient Oligomerization of Pentene into Liquid Fuels
on Nanocrystalline Beta Zeolites. ACS Publications. Collection. https://doi.org/10.1021/acscatal.7b00817
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AUTHORS (6)
MD
M. Rocío Díaz-Rey
CP
Cecilia Paris
RM
Raquel Martínez-Franco
MM
Manuel Moliner
CM
Cristina Martínez
AC
Avelino Corma