Abstract
Studies over a commercial NiMo/Al/sub 2/O/sub 3/ catalyst at 350, 375, and 390/sup 0/C and 6.9 MPa using quinoline or various intermediate reaction products showed that the reaction rate constants for the various hydrodenitrogenation (HDN) reactions in the presence of an inert paraffin liquid are very similar to those for the same reactions in the vapor phase, although the liquid tends to equalize the adsorptivities of the various N-compounds present. Over a wide range, for a specified pressure and temperature, the percent conversion as a function of contact time is remarkably similar for liquid- and vapor-phase processing. In both cases, the overall HDN reaction is essentially zero order under the conditions studied. Equilibrium between quinoline and 1,2,3,4-tetrahydroquinoline is rapidly attained in both vapor-phase and liquid-phase processing. Homogeneous reactions were negligible except for the hydrogenation of quinoline to 1,2,3,4-tetrahydroquinoline.
Published Version
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