具有大孔-介孔的分级孔结构碳——合成及其吸附脱硫性能研究  

Carbon with Hierarchical Macro-Mesoporous Structure——Study on Synthesis and Adsorptive Desulfurization

作　　者：管大翔 王益良[1] 周宝成[1] 董晓平[1] 

机构地区：[1]浙江理工大学理学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2015年第4期475-480,共6页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：教育部留学归国基金(教外司留[2012]940号);浙江理工大学521人才计划

摘　　要：报道了一种具有大孔-介孔两套孔的分级孔结构碳材料,并研究了其在燃油吸附脱硫方面的应用。材料的合成分为两步,先以MgO小球为硬模板,酚醛树脂为碳源,经反相复制的方法得到大孔碳材料;再经过KOH的化学活化,在碳骨架中引入介孔结构。以分级孔结构碳材料为吸附剂,二苯并噻吩为含硫模型分子,研究了吸附时间、二苯并噻吩浓度对吸附性能影响。吸附动力学研究表明,吸附过程遵循伪二阶模型,属于化学吸附。吸附等温线研究显示,吸附能较好地符合Langmuir等温式和Freundlich等温式,最大理论吸附量高达153.6mg/g。Carbon material with hierarchical macro-mesoporous structure was reported.Its application in fuel oil adsorptive desulfurization was studied.Material synthesis is divided into two steps.Firstly,macroporous carbon material was gained through opposition duplication by taking MgO spheres as hard template and phenolic resin as the carbon source;then,through chemical activation of KOH,mesoporous structure was introduced in carbon skeleton.Carbon material with hierarchical pore structure served as the adsorbent,and dibenzothiophene served as model molecules containing sulphur to study effects of adsorption time and dibenzothiophene concentration on adsorptive property.Adsorption kinetics researches show that the adsorption process follows pseudo second-order model and belongs to chemical absorption.Adsorption isotherm researches show that adsorption energy can well comply with Langmuir isothermal equation and Freundlich isothermal equation;the maximum theoretical adsorbing capacity is as high as153.6mg/g.

关 键 词：大孔-介孔结构 分级孔结构碳 吸附脱硫 二苯并噻吩 

分 类 号：TQ127.1[化学工程—无机化工]