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The vapor-phase synthesis of 3-methylindole from glycerol and aniline over Cu/NaY modifed by K2O was investigated.The catalysts were characterized by X-ray diffraction(XRD)and the temperatureprogrammed desorption of ammonia(NH3-TPD).The effect of the reaction temperature on the activity and selectivity of Cu/NaY-K2O catalyst was also investigated.The results indicated that the addition of K2O to Cu/NaY increased the selectivity of the catalyst remarkably because the amount of middle-strong acid sites decreased clearly.The decrease of the reaction temperature was benefcial for the increase of 3-methylindole selectivity.Over Cu/NaY-K2O,the selectivity of 3-methylindole reached 75%and the yield of the target product was up to 47%at 220 8C.A probable catalytic mechanism for the synthesis of 3-methylindole from glycerol and aniline was proposed.
The vapor-phase synthesis of 3-methylindole from glycerol and aniline over Cu / NaY modifed by K2O was investigated. The catalysts were characterized by X-ray diffraction (XRD) and the temperature program programmed desorption of ammonia (NH3-TPD). The effect of the reaction temperature on the activity and selectivity of Cu / NaY-K2O catalyst was also investigated. The results indicated that the addition of K2O to Cu / NaY increased the selectivity of the catalyst remarkably because the amount of middle-strong acid sites decreased clearly. The decrease of the reaction temperature was beneficially for the increase of 3-methylindole selectivity. Over Cu / NaY-K2O, the selectivity of 3-methylindole reached 75% and the yield of the target product was up to 47% at 220 8C.A probable catalytic mechanism for the synthesis of 3-methylindole from glycerol and aniline was proposed.