Influence of the support on the catalytic properties of Keggin type heteropolyacids supported on niobia according to two different methodologies: evaluation of isopropanol dehydration and Friedel–Crafts alkylation reaction

Effect of crystal size on the acidity of nanometric Y zeolite: number of sites, strength, acid nature, and dehydration of 2-propanol

“…This high conversion can only be explained by the wider presence of strong Brønsted acid sites in the aforementioned materials, which have been seen to be responsible for activating the dehydration reaction at low temperatures in accordance with the E1 elimination mechanism. 62,63 Nevertheless, HY DA zeolites with a better Brønsted/Lewis ratio at each crystallite size show a lower catalytic activity than HY zeolites due to the higher number of strong acid sites in the latter, leading to better conversions.…”