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Title of article :
Selective liquid-phase transformation of α-pinene over dealuminated mordenites and Y-zeolites Original Research Article
Author/Authors :
Carmen M. L?pez، نويسنده , , Francisco J. Machado، نويسنده , , Karina Rodr??guez، نويسنده , , Bernardo Méndez، نويسنده , , Masahisa Hasegawa، نويسنده , , Sara Pekerar، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1998
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Abstract :
Dealuminated mordenite (MOR) and faujasite (FAU) zeolites, and a 13% alumina amorphous aluminosilicate were tested as catalysts for the liquid-phase transformation of α-pinene at 120°C in a batch reactor. Limonene and camphene were the main products observed over zeolites. Mordenites gave the maximum yield (68%) of limonene and camphene with a selectivity of camphene/(limonene+camphene) greater than 0.54. Wider pore diameters and larger pore volumes gave higher yields of undesired products, probably sesquiterpenes and other heavy compounds. The amorphous aluminosilicate selectivity to camphene+limonene was the poorest (18%) and gave the highest yield of undesired products (48%). The specific transformation rate of α-pinene passes through a maximum at 0.4 AlIV per 1000 Å3 of unit cell, corresponding to 1 AlIV/MOR unit cell or 6 AlIV/FAU unit cell.
Keywords :
Dealuminated zeolites , Mordenite , Faujasite , MAS NMR , ?-Pinene transformation
Journal title :
Applied Catalysis A:General
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