Tailoring selectivity in the liquid-phase isomerization of α-pinene on dealuminated ferrierite-type zeolites

摘要: Abstract Ferrierite-type zeolite (Zeolyst Intern.) with Si/Al = 10 was dealuminated sequentially using solutions of hydrochloric acid different concentrations. The course dealumination followed by XRD, XPS, sorption nitrogen, scanning electron microscopy, FTIR, and solid-state 29Si, 27Al 1H MAS NMR. samples retained high crystallinity revealed good properties. tetrahedrally coordinated aluminium in ferrierite distributed between TB sites located the main channels TA ones siting hidden positions. It shown that removed from a non-random manner; up to 60% 19-% sites. amount strength Bronsted decreased dealumination. were tested liquid-phase isomerization α-pinene at 348–363 K; camphene limonene products. initial reaction rates turnover frequencies have been estimated compared other catalysts. selectivity range 77–98.9 %.