β–苯乙醇在烟草秸秆活性炭上的吸附及缓释性能  

Adsorption and sustained release properties ofβ-phenylethanol using tobacco straw activated carbon

作　　者：许克静 刘向真 刘语煊 马一琼 郝辉 张智轩 方志辉 梁淼 陈小龙 张峻松 XU Kejing;LIU Xiangzhen;LIU Yuxuan;MA Yiqiong;HAO Hui;ZHANG Zhixuan;FANG Zhihui;LIANG Miao;CHEN Xiaolong;ZHANG Junsong(China Tobacco Henan Industrial Limited Company,Zhengzhou,Henan 450003,China;College of Tobacco Science and Engineering,Zhengzhou University of Light Industry,Zhengzhou,Henan 450002,China)

机构地区：[1]河南中烟工业有限责任公司,河南郑州450003 [2]郑州轻工业大学烟草科学与工程学院,河南郑州450002

出　　处：《湖南农业大学学报(自然科学版)》2025年第2期122-128,共7页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：河南中烟工业有限责任公司科研项目(AW2022024)。

摘　　要：以烟草废弃秸秆为碳源,选择3种活化时间(60、75、90 min),采用热解活化法制备烟草秸秆活性炭(TSAC60、TSAC75、TSAC90),利用制备的3种活性炭(TSAC)研究其对β–苯乙醇的吸附和释放行为,并采用动力学模型分析孔隙结构对β–苯乙醇吸附和释放行为的影响。结果表明:不同活化时间下制备的3种TSAC孔隙结构有差异,当活化时间从60 min增至90 min时,微孔率由66.39%降低至24.81%;TSAC对β–苯乙醇的负载均以物理吸附为主,准一级动力学模型可较好地描述吸附过程,TSAC60对β–苯乙醇的平衡吸附率最高,为101.49%,但吸附速率常数最小;TSAC负载的β–苯乙醇热稳定性增加,其中TSAC60对β–苯乙醇的缓释效果最明显,Page模型可较好地描述β–苯乙醇的非等温热释放过程;β–苯乙醇从3种TSAC中释放的过程均符合Korsmeyer–Peppas模型,等温释放过程均以Fick扩散为主,TSAC60中β–苯乙醇在35d时的释放率为27.34%;TSAC中的微孔结构是影响其对β–苯乙醇吸附和缓释性能的关键因素。Tobacco straw activated carbons(TSAC60,TSAC75,TSAC90)were prepared at three activation times(60,75,90 min)by pyrolysis activation method.The adsorption and release behaviors ofβ-phenylethanol on the three prepared activated carbons(TSAC)were studied,and the influence of pore structure on the adsorption and release behavior ofβ-phenylethanol was analyzed using a kinetic model.The results showed that the pore structure varied with activation time:microporosity decreased from 66.39%(TSAC60)to 24.81%(TSAC90).Adsorption ofβ-phenylethanol on TSAC was primarily physical,best fitted by the pseudo-first-order kinetic model,with TSAC60 showing the highest equilibrium adsorption(101.49%)but the lowest rate constant.Non-isothermal heat release analysis indicated enhanced thermal stability,with TSAC60 exhibiting the strongest sustained release,well-described by the Page model.Isothermal release followed the Korsmeyer-Peppas model,dominated by Fickian diffusion;TSAC60 released 27.34%ofβ-phenylethanol after 35 days.The microporosity of TSAC was the key factor governing adsorption and sustained release performance.

关 键 词：烟草秸秆 活性炭 β–苯乙醇 吸附 缓释 热稳定性 动力学 

分 类 号：TQ424.19[化学工程] TS264.3[轻工技术与工程—发酵工程]