以葡萄糖为碳源不同碳化方式固体酸催化剂的制备与性能评价

Preparation and performance evaluation of solid acid catalyst with different carbonation conditions of glucose as carbon source

以葡萄糖为碳源,发烟硫酸为磺酸化试剂,分别采用水热碳化法和热解碳化法制备碳基固体酸催化剂。使用扫描电镜、热重分析、X射线衍射和傅里叶变换红外光谱等对催化剂进行表征,并评价催化剂在纤维素水解反应中的性能。结果表明,两种碳化方式制备的碳基固体酸催化剂在形貌上具有很大差异,但结构上均含有—OH、—COOH和—SO_3H官能团,对于纤维素的水解反应,在150℃反应3 h,纤维素水解率超过60%。

Carbon-based sulfonated solid acid catalysts were prepared using glucose as carbon source and fuming sulfuric acid assulfonation reagent by hydrothermal carbonation and pyrolysis carbonization.Catalysts were characterized by scanning electron microscopy(SEM),thermogravimetry(TG),X-ray diffraction(XRD)and Fourier transform infrared(FT-IR)spectroscopy.The catalyst was tested in hydrolysis of cellulose.Results showed that the catalysts prepared by the two carbonization methods were very different in morphology,but they all contained-OH,-COOH,-SO 3H functional groups.For hydrolysis of cellulose,under optimized conditions,cellulose hydrolysis rate was up to 60%or more.