磷酸法制备活性炭活化机理研究  

Study on Preparation Mechanism of Activated Carbon by Phosphoric Acid Activation

作　　者：朱光真[1] 邓先伦[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所生物质化学利用国家工程实验室国家林业局林产化学工程重点开放性实验室江苏省生物质能源与材料重点实验室,江苏南京210042

出　　处：《安徽农业科学》2011年第30期18653-18655,共3页Journal of Anhui Agricultural Sciences

基　　金：林业公益性行业专项(201004051);"十一五"国家科技支撑计划资助(2009BADB1B03)

摘　　要：[目的]研究磷酸法制备活性炭的活化机理。[方法]将磷酸浸渍后的木质纤维素类原料经稀酸水解后提取还原糖,研究还原糖含量与相应工艺条件下制备的活性炭产品孔性能之间的关系。[结果]在该试验条件下,还原糖含量与活性炭产品孔性能基本呈正相关,而在浓硫酸添加量较高时,呈反相关,可能是由于浓硫酸的过度催化导致形成更小分子量的低聚糖,对较大拓扑结构的形成不利,反而会降低比表面积和孔的发展。[结论]为活性炭生产提供一定的理论指导。[Objective] To study the preparation mechanism of activated carbon（AC） National EngineeingLab for Biomass Chemical Utilization;Keylab on Forese chemical Engineening,SAF;Key Lab of Biomass Energy and Material,Jiangsu Proinmce,by phosphoric acid activation.[Method] Reducing sugar was extracted through dilute acid hydrolysis of lignocellulosic materials impregnated with phosphoric acid and the relationship between reducing sugar content and pore texture of corresponding AC was explored.[Result] Within experimental conditions,there was a positive correlation between the reducing sugar content and pore texture of corresponding AC,while a negative correlation was seen under high dose of concentrated sulfuric acid,oligosaccharides with lower molecule size,which were produced due to the excessive hydrolysis of higher concentrated sulfuric acid content,were unfavorable to form larger topological structure and on the contrary prevented the development of specific surface area and pore of AC.[Conclusion] The study provided theoretical direction for the industrial production of AC.

关 键 词：磷酸 活性炭 还原糖 机理 

分 类 号：TQ424[化学工程]