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The role of Mo coordinatively unsaturated sites (CUS) and Brønsted acidic sites in the hydrodenitrogenation of pyridine was investigated in an atmospheric-pressure microreactor. The test catalysts consisted of nonsulfided Mo oxide supported on Al 2 O 3 , SiO 2 , and silica-aluminas, containing different concentrations of Mo CUS and Brønsted acidic sites. The kinetic study revealed...
Diffuse reflectance FTIR spectroscopy of chemisorbed pyridine was used to investigate the influence of catalyst composition and treatment on the content of Brønsted and Lewis acidity. This investigation included oxidic and reduced Mo oxide catalysts containing 2, 4, 8, and 12 wt% MoO 3 . The supports were seven silica-aluminas of composition between 0 and 100 wt% SiO 2 . The IR spectra...