二氧化硫低温等离子法改性粉煤灰固体酸催化剂及其催化木糖制糠醛性能
Sulfur dioxide low-temperature plasma modification of fly ash-derived solid acid catalyst and its catalytic performance in xylose to furfural conversion
王茜 1张鸿伟 1吕世钧 1朱劼 2王利群 1陶昱恒 1卿青1
作者信息
- 1. 常州大学 药学院,江苏 常州 213164;常州大学 生物过程工程实验室,江苏 常州 213164
- 2. 常州大学 生物过程工程实验室,江苏 常州 213164
- 折叠
摘要
采用绿色、高效的方法实现活性基团与载体的连接是非均相催化剂构建的关键.通过二氧化硫(SO2)低温等离子技术在工业粉煤灰(CFA)表面进行含硫官能团的接枝改性,制备了固体酸催化剂CFA-HSO3,并将其用于木糖降解制糠醛.采用傅里叶变换红外光谱仪(FTIR)、全自动比表面积(BET)及孔径分析仪、有机元素分析仪(OEA)、X-射线衍射仪(XRD)和扫描电镜(SEM)等手段对样品进行了表征,并通过优化反应条件提高了催化反应中糠醛的产率.结果表明,SO2低温等离子改性后,样品表面成功接枝了含硫官能团,该方法还缩短了催化剂的制备时间.在水和4-甲基-2-戊酮(MIBK)体积比为1∶3的双相溶剂体系中,加入0.6 g木糖、0.2 g NH4Cl和0.3 g催化剂,于190 ℃下反应20 min,糠醛的产率可以达到89.6%,相较于纯水体系提高了47.9%.此外,CFA-HSO3还具有良好的催化稳定性和可回收使用性.采用的绿色高效的催化剂改性方式为糠醛的制备提供了一种新路径.
Abstract
Establishing a connection between active sites and supports using green and efficient methods is crucial for the construction of heterogeneous catalysts.The surface of industrial fly ash(CFA)was sulfurized through a sulfur dioxide(SO2)low-temperature plasma modification,resulting in a solid acid catalyst termed CFA-HSO3.This catalyst was then utilized for the conversion of xylose to furfural.Characterization of the samples was conducted using various techniques,including Fourier-transform infrared spectroscopy(FTIR),Brunauer-Emmett-Teller(BET)surface area and pore size analysis,organic elemental analysis(OEA),X-ray diffraction(XRD),and scanning electron microscopy(SEM).The yield of furfural in the catalytic reaction was enhanced by optimizing reaction conditions.The results indicate that the successful grafting of sulfur-containing functional groups onto the sample's surface after SO2 low-temperature plasma modification.This approach can also reduce the catalyst's preparation time.In a biphasic solvent system with a water-to-4-methyl-2-pentanone(MIBK)volume ratio of 1∶3,adding 0.6 g of xylose,0.2 g of NH4Cl,and 0.3 g of catalyst,and reacting at 190 ℃ for 20 minutes,the yield of furfural can reach 89.6%,which is 47.9%higher than that of pure water system.Furthermore,CFA-HSO3 exhibites excellent catalytic stability and reusability.This study introduces a green and efficient catalyst modification approach,offering a novel pathway for the preparation of furfural.
关键词
SO2低温等离子技术/粉煤灰/固体酸催化剂/双相溶剂体系/木糖/糠醛Key words
SO2 low-temperature plasma technology/fly ash/solid acid catalyst/biphasic solvent system/xylose/furfural引用本文复制引用
基金项目
常州市科技计划(CJ20220217)
江苏省高等学校"青蓝工程"项目(2022)()
出版年
2024
国家科技期刊平台
NSTL
万方数据