Study on the Preparation of Porous ZrO2 by Pyrolysis of UiO-66 and Its Catalytic Performance in Biomass Pyrolysis
Biomass materials can produce a series of oxygen-containing heterocyclic compounds through catalytic pyrolysis,among which 5-hydroxymethylfurfural,as a marker of the Maillard reaction,has widespread applications in the food industry.This paper utilizes a metal-organic framework material(UiO-66)formed by Zr4+ions and terephthalic acid as a sacrificial template,employing both segmented calcination and direct calcination methods to prepare ZrO2 catalysts.The structure and morphology of the catalysts were characterized using X-ray diffraction(XRD),scanning electron microscopy(SEM),and so on,and the catalytic performance in biomass pyrolysis was tested using pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS).The results show that the ZrO2 solid acid catalysts derived using UiO-66 as a template,through both segmented calcination and direct air atmosphere calcination,have similar morphologies which exhibiting a loose nanoneedle structure.Comparatively,the ZrO2 catalyst obtained through segmented calcination has a superior specific surface area and more catalytic sites,which effectively enhances the content of 5-hydroxymethylfurfural in the biomass catalytic products.
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维普
