PET在油茶壳炭C-SO_(3)H基固体酸催化剂下的液化行为研究  

Study on Liquefaction Behavior of PET under Catalysis with Camellia Shell C⁃SO_(3)H Solid Acid

作　　者：刘润清[1] 邢明明[1] 黄继明[1] LIU Runqing;XING Mingming;HUANG Jiming(TongRen Universtiy,Tongren 554300,China)

机构地区：[1]铜仁学院,贵州铜仁554300

出　　处：《中国塑料》2021年第3期105-111,共7页China Plastics

基　　金：黔科合LH字(2017)7313;黔教合KY字(2017)320。

摘　　要：以废弃生物质油茶壳为原料,在经过一系列炭化、磺化后成功制备了一种新型的炭基固体酸催化剂(C-SO_(3)H),考察了催化剂制备过程中温度和浓度等因素对催化活性的影响,利用X射线衍射仪、扫描电子显微镜、红外光谱仪和核磁共振波谱仪等对催化剂及其催化废弃聚对苯二甲酸乙二醇酯(PET)的催化效率、催化机理等进行了测定和分析。结果表明,催化剂的最佳制备条件为:浸渍比1∶1、浸渍浓度2 mol/L、炭化温度700℃、磺化温度160℃;催化PET的最大的转化率和BHET回收率分别为95%和68%;催化剂微观呈现无定型炭结构,含有大量的羟基,具有较大的比表面积;醇解反应产物为单体BHET。In this paper,a new type of carbon-based solid acid catalyst(C-SO_(3)H)was successfully prepared after a series of carbonization and sulfonation using waste biomass camellia husk as raw material.The catalytic ability was performance by catalyzing waste polyethylene terephthalate.The product of the alcoholysis reaction were also characterized by infrared spectroscopy and nuclear magnetic spectroscopy.In additin,the alcoholysis reaction kinetics and mechanism of were also analyzed in this paper.By investigating the influence of factors such as temperature and concentration during the catalyst preparation process,the result manifest that the best preparation conditions are:impregnation ratio 1∶1,impregnation concentration 2 mol/L,carbonization temperature 700℃,sulfonation temperature 160℃.The maximum PET conversion rate and BHET recovery rate were 95%and 68%,respectively.In addition,powder diffraction shows that the catalyst has an amorphous carbon structure,infrared spectroscopy shows that the catalyst contains a large number of hydroxyl groups,scanning electron microscopy shows that the catalyst has pores,exhibting a large specific surface area.The product of alcoholysis reaction was monomer BHET.

关 键 词：聚对苯二甲酸二乙二醇酯 磺化 油茶壳 催化剂 动力学 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]