Model Reaction, Procedures and Set-up

The dehydrogenation of cyclohexane to benzene was studied at the laboratory scale. 

To catalyze the reaction, 1 wt% Pt on a g-AhCh support (Degussa, F221 XH/D 1 %) was used. The BET surface area of this catalyst was 215 m2g-i, and pellet sizes of 2-4 mm and crushed material were used. 

Due to a high selectivity and moderate temperatures required to perform this endothermic reaction it is well suited to serve as a model reaction [40], 

The membrane used was a Vycor glass tube (Corning Inc., code 7930), the dimensions of which were dinner = 7.8 mm, douter = 10 mm, and L = 100 mm. Vycor glass possesses a narrow pore size distribution, with a mean pore diameter of approximately 4 nm. 

In preliminary experiments the performance of the applied Micro-Berty reactor (Autoclave Engineers, Vr = 12 cm3 [18]) was tested. The catalyst mass introduced in this reactor was mcat= 2.1 g. In preliminary runs, by varying the stirring rate it 

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