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G. Kinger, D. Majda, H. Vinek:
"n-Heptane hydroisomerization over Pt-containing mixtures of zeolites with inert materials ";
Applied Catalysis A: General, 225(1-2) (2002), 301 - 312.

Hydroisomerization and hydrocracking of n-heptane on Pt-containing HMCM-22, HBeta and on composites with MCM-41
and SiO2 were investigated at 20 bar pressure in the temperature range from 493 to 593 K. The composites showed higher activity
and selectivity in isomerization compared to the simple Pt-containing zeolites. The improvement in the catalytic properties
wasmuch higher with MCM-22, which has a smaller pore system than with Beta. The higher activity and especially the higher
selectivity were explained by the faster adsorption and desorption in the composites. It seems that the transport properties are
the most important parameter controlling the final catalyst selectivity.