β-苯乙醇在不同类型多孔材料上的脱附活化能  

Desorption activation energy of β-phenylethyl alcohol on different type of porous materials

作　　者：王明锋[1] 熊智勇[2] 刘娟[1] 黄艳[2,3] 

机构地区：[1]红云红河烟草(集团)有限责任公司,技术中心,云南昆明650231 [2]华南理工大学、化学与化工学院,广东广州510640 [3]华芳烟用香料有限公司,技术中心,广东广州510530

出　　处：《中国烟草学报》2014年第2期34-38,共5页Acta Tabacaria Sinica

基　　金：中国烟草总公司科技重大专项项目(110201001006);云南省中烟工业有限责任公司科技项目(2013FL03)

摘　　要：采用程序升温脱附(TPD)实验技术测定了β-苯乙醇在5种多孔材料上的TPD曲线,并估算了它们的脱附活化能。同时还讨论了多孔材料的孔径结构和表面性质对β-苯乙醇吸附结合力的影响规律。结果表明:(1)β-苯乙醇在多孔材料上的脱附活化能(kJ/mol)由低到高依次为:B型硅胶(46.90)、SBA-15分子筛(56.16)、A型硅胶(67.92)、MCM-41分子筛(86.16)和XF型活性炭(91.87);(2)除XF型活性炭外,吸附剂表面酸性基团的增加有利于增强其对β-苯乙醇的吸附结合力,β-苯乙醇在吸附剂上的脱附活化能随吸附剂表面酸性基团含量的升高而增大;(3)与其它几种多孔材料相比,XF型活性炭与β-苯乙醇之间因存在π键吸附使得吸附作用力增强,脱附活化能也较高。Temperature programmed desorption（TPD） technique was applied to measure TPD curves of β-phenethyl alcohol on five types of porous materials, and desorption activation energy of phenethyl alcohol was estimated. Effects of pore structure and surface properties of these porous materials on desorption activation energy of phenyl ethyl alcohol were also discussed. Results showed that：（1） Desorption activation energy（kJ/mol） of β-phenethyl alcohol on porous materials was in the following order： silica gel B（46.90 kJ/ mol）SBA-15 molecular sieve（56.16 kJ/mol）silica gel A（67.92 kJ/mol）MCM-41 molecular sieve（86.16 kJ/mol）activated carbon XF（91.87 kJ/mol）;（2） With exception of activated carbon XF, the higher the surface acidic group content of an adsorbent, the stronger the interaction of β-phenethyl alcohol that adsorbent became, and the higher the desorption activation energy;（3） Since there was strong π-Complexation between β-phenylethyl alcohol and activated carbon, desorption activation energy of β-phenethyl alcohol on activated carbon was higher compared to that on other porous materials.

关 键 词：活性炭 硅胶 分子筛 Β-苯乙醇 TPD 脱附活化能 

分 类 号：TQ028[化学工程]