Preparation and Performance Analysis of Salix Carboniferous Solid Acid Catalysts

Abstract

Salix carboniferous solid acid catalyst was prepared by pyrolysis carbonization and sulfonation of Salix psammophila, used in esterification of oleic acid and methanol for biodiesel production. The transformation of pore structure ,peak state of functional groups, phase structure, morphological characteristics,and thermal stability of Salix,Carbonized intermediate and Sulfonated catalyst were characterized by BET Static nitrogen adsorption instrument, Fourier transform infrared spectrometer (FT-IR), Scanning electron microscope(SEM),X-ray diffractometer (XRD). Combined with the analysis of infrared and nitrogen adsorption data, the catalyst made the great esterification rate of oleic acid, which was the result of the synergistic effect of three kinds of functional groups and pore structure. Combined with SEM and XRD data, the amorphous carbon structure of the catalyst is important to the catalytic performance, and the catalyst has good stability. Therefore, the preparation of biomass carbon-based solid acid catalyst have received great attention in many aspects.