Abstract
The activity of several minerals, representative of those indigenous to coal, liquefaction residue ash and metal oxides, has been examined using a probe reaction, the hydrogenation of cyclohexene. The selectivity of the various minerals for isomerization and hydrogenation was determined from the cyclohexene products distribution. A complementary i.r. study using adsorbed pyridine to examine the surface acidity of the minerals was also performed and the results compared with those of the cyclohexene reaction. Finally, an attractive mechanism for the isomerization of cyclohexene to methylcyclopentenes is proposed. The activity and selectivity of the various minerals studied have implications for various types of reactions occurring in coal liquefaction, which may be catalysed by coal minerals.
Published Version
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