3 H is not able to protonate reversibly small alkanes. At room temperature propane and n -butane do not exchange their hydrons for deuteriums with deuterated triflic acid. In the same way, the formation of C 5 alkanes during C 4 isomerization is indicative of a classical bimolecular process. The two catalysts exhibit similar unidimensional pore structures with hexagonal symmetries. They have also been compared with K10, a mesoporous acid-treated clay catalyst.
Results show that the acid-treated clay is the most active of the three catalysts in both reactions.
Infrared spectra of adsorbed pyridine show relative concentrations of Lewis and Br nsted acid sites consistent with this. Differences in the dependence of catalytic activities on thermal activation temperature are interpreted in terms of the hydration properties of the catalysts. By using the characteristics of a hydrogen-absorbing alloy, the hydrogen produced by catalytic dehydrogenation of saturated compounds can be absorbed to form metal hydrides, and, vice versa, the resulting metal hydrides are able to hydrogenate efficiently unsaturated compounds upon dehydriding. 2-propanol was effectively dehydrogenated at 423 K to yield acetone in which the dissociated hydrogen was completely absorbed by CaNi 5 to form the metal hydride. When the alloy was hydrided to some extent, butene was hydrogenated by the absorbed hydrogen in the metal hydride to produce butane.