Preparation of fibrous (SO_4)~(2-)/ZrO_2-NiO solid acid catalyst, characterization and its catalytic properties

摘要

A novel (SO_4)~(2-)/ZrO_2-NiO solid acid catalyst was prepared by using collagen fiber as the template. It was found that the (SO_4)~(2-)/ZrO_2-NiO catalyst remained good fibrous morphology by scanning electron microscopy (SEM). The IR analysis suggested that the metal oxide surface and (SO_4)~(2-) were combined to form dual-coordinate state. The catalyst had both medium strong acidic sites and strong acidic sites through temperature-programmed decomposition (TPD) of ammonia. The calcination temperature is inversely proportional to the surface area of fibrous ZrO_2-NiO. The catalyst was applied to the esterification of acetic acid with n-butanol to estimate the catalytic activity and the best preparation conditions of (SO_4)~(2-)/ZrO_2-NiO solid acid catalyst was found out. The results showed the (SO_4)~(2-)/ZrO_2-NiO catalyst had high catalytic activity.