香蒲基生物炭的活化及对VOCs吸附的应用  

Activation of Biochar from Cattail and the VOCs Adsorption Application

作　　者：王红宁[1] 黄丽 清江 马腾洲 蒋伟 黄维秋[2] 陈若愚[1] WANG Hongning;HUANG Li;QING Jiang;MA Tengzhou;JIANG Wei;HUANG Weiqiu;CHEN Ruoyu(Jiangsu Province Key Laboratory of Fine Petrochemical Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Oil and Gas Storage and Transport Technology,Changzhou University,Changzhou 213016,China;Technical Center for Industrial Product and Raw Material Inspection and Testing,Shanghai Customs,Shanghai 200135,China)

机构地区：[1]常州大学精细石油化工江苏省重点实验室,常州213164 [2]常州大学江苏省油气储运技术重点实验室,常州213016 [3]上海海关工业品与原材料检测技术中心,上海200135

出　　处：《高等学校化学学报》2022年第4期14-23,共10页Chemical Journal of Chinese Universities

基　　金：国家重点研发计划项目(批准号:2019YFC0810905);国家自然科学基金(批准号:52174058);海关总署课题(批准号:200HK251)资助.

摘　　要：以香蒲为原料制备生物炭(Biochar),并用不同试剂进行活化.活化前的Biochar比表面积和孔体积很小,分别为1.71 m^(2)/g和0.00421 cm^(3)/g,而活化后的Biochar比表面积和孔容均增大,其中经碳酸钠(Na_(2)CO_(3))活化后的Biochar比表面积和孔容最大.研究了Na_(2)CO_(3)与Biochar的质量比对其活化的影响,确定了Na_(2)CO_(3)/Biochar最佳质量比为3∶1条件下,得到的样品Biochar-Na_(2)CO_(3)-3具有最优的表面积和孔容,分别为624 m^(2)/g和0.211 cm^(3)/g,并具有优异的挥发性有机化合物(VOCs)吸附性能,其正己烷、甲苯和92号汽油的静态吸附容量分别为1.03,0.814和0.751 g/g,正己烷和甲苯的动态吸附容量分别为1.00和0.796 g/g,且吸附稳定性相对较高,优于商业用活性炭(AC)和硅胶(SG).Biochar was achieved by using cattail as raw material and activated with different agents.The specific surface area and pore volume of biochar before activation was very small,1.71 m^(2)/g and 0.00421 cm^(3)/g,respectively,and they were greatly increased after activation.The biochar activated by Na_(2)CO_(3) has the best surface area and pore volume.At the same time,the effects of different mass ratios of Na_(2)CO_(3) and Biochar on the activation of Biochar were studied,and the optimal mass ratio of activation was determined.When mass ratio of Na_(2)CO_(3)/Biochar is 3∶1,the synthesized dample(Biochar-Na_(2)CO_(3)-3)has the biggest specific surface area and pore volume(624 m2/g and 0.211 cm3/g),which has excellent adsorption performance of volatile organic compounds(VOCs).The static n-hexane,toluene and No.92 gasoline adsorption capacities of Biochar-Na_(2)CO_(3)-3 are 1.03,0.814 and 0.751 g/g,respectively.The dynamic n-hexane and toluene adsorption capacities of Biochar-Na_(2)CO_(3)-3 are 1.00 and 0.796 g/g,respectively.The adsorption performance is stable,which is better than the commercial activated carbon(AC)and silica gel(SG).

关 键 词：生物炭 活化 挥发性有机化合物 吸附-脱吸 稳定性 

分 类 号：O613[理学—无机化学]