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1950994 
Journal Article 
Influence of method of preparation on pore structure and dehydrogenation activity of chromia catalysts 
Rao, KSR; Narayana, KV; Venugopal, A; Rao, VV; Masthan, SK; Rao, PK 
1996 
1 
Indian Journal of Chemistry. Section A
ISSN: 0376-4710
EISSN: 0975-0975 
35 
8 
656-659 
WOS:A1996UY21700007 
Amorphous and crystallite chromia catalysts have been prepared by in situ reduction of Cr(VI) oxide and by decomposition of Cr(NO3)(3) respectively, characterized by several techniques and evaluated for dehydrogenation of cyclohexane to benzene. The catalysts are found to be mesoporous and macroporous with average pore diameters of 108 Angstrom and 470 Angstrom respectively. The surface area of amorphous chromia is found to be 5.2 times larger of crystalline chromia. In the reduced form, the oxygen chemisorption capacity of the former is 8.3 times higher than that of the latter. The ratio of the dehydrogenation rates over the two catalysis is also found to be almost equal to that of their O-2 uptakes. The intrinsic activities of the two morphologies of chromia calculated on the basis of irreversible O-2 uptakes and the activities are found to be equal (3.61 x 10(-1)). All these observations suggest that the dehydrogenation of cyclohexane is a structure insensitive reaction on chromia catalysts.