活性炭基硅镁复合吸附材料制备及其表征  

Preparation and Characterization of Activated Carbon Based Silicon-magnesium Composite Adsorbent Material

作　　者：洪超 许伟[2] 刘军利[2] HONG Chao;XU Wei;LIU Junli(College of Chemical Engineering,Nanjing Forestry University/Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing 210037,China;Institute of Chemical Industry of Forest Products,CAF/Key Lab.of Biomass Energy and Material,Jiangsu Province,Nanjing 210042,China)

机构地区：[1]南京林业大学化学工程学院,江苏省林业资源高效加工利用协同创新中心,江苏南京210037 [2]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,江苏南京210042

出　　处：《林产化学与工业》2024年第6期31-37,共7页Chemistry and Industry of Forest Products

基　　金：云南省重大科技专项项目资助(202402AE090027)。

摘　　要：以粉状活性炭(PAC)为原料,富含硅镁的坡缕石(PGS)为黏结剂,通过挤压成型的方法制备活性炭基硅镁复合吸附材料(PAC/PGS),考察不同的PAC和PGS质量比(炭料比)、焙烧温度和焙烧时间对PAC/PGS性能的影响,确定最佳成型条件。当炭料比50∶50,焙烧温度300℃,焙烧时间60 min,PAC/PGS整体性能最好,耐磨强度可达90%以上。PAC/PGS的亚甲基蓝吸附值为221.2 mg/g、碘吸附值为718.1 mg/g、四氯化碳吸附率为72%、比表面积为927 m^(2)/g、总孔容为0.7657 cm^(3)/g、平均孔径为3.21 nm、得率为96.2%,具备较好吸附性能与孔隙结构。通过热重(TG)分析、X射线衍射(XRD)、比表面积分析等技术对复合吸附材料结构进行表征,分析结果表明:PGS在300℃温度下能够保证孔道结构的完整,提高PAC/PGS的结构性能;PAC与PGS的成型过程主要属于物理结合,PAC分布在PGS棒状晶体间形成更为丰富的不规则孔隙,PAC/PGS的孔隙主要分布0.6~0.9 nm、1.1~30 nm,中孔约占80%。Using powdered activated carbon(PAC)as the raw material,and palygorskite(PGS)that was rich in silicon and magnesium as the binder to prepare activated carbon-based silicon magnesium composite material(PAC/PGS)by extrusion molding method.The effects of different carbon-soil ratios,roasting temperatures,etc.on the performance of PAC/PGS were investigated to determine the optimal molding conditions.Thermogravimetric(TG)analysis,X-ray diffraction(XRD)and specific surface area were used to characterize the structure of the material.The results showed that the optimal performance of PAC/PGS was achieved when the carbon-soil mass ratio was 50∶50,the roasting temperature was 300℃as well as the roasting time was 60 min,and the abrasion resistance of PAC/PGS could reach more than 90%.The adsorption value of PAC/PGS for methylene blue was 221.2 mg/g,the iodine adsorption value was 718.1 mg/g,the adsorption rate of carbon tetrachloride was 72%,the specific surface area was 927 m^(2)/g,the total pore volume was 0.7657 cm^(3)/g,the average pore size was 3.21 nm,and the yield was 96.2%,which had a good adsorption performance and pore structure.Under this condition,the PGS had internal opened pores,where PAC was distributed among the rod-like crystals of PGS,forming more abundant irregular pores.The pores of PAC/PGS were mainly distributed in the range of 0.6-0.9 nm and 1.1-30 nm,and mesopores accounts for approximately 80%.

关 键 词：粉状活性炭 坡缕石 亚甲基蓝吸附值 碘吸附值 四氯化碳吸附值 

分 类 号：TQ35[化学工程] TQ424.1