作　　者： ; ; ; ;

机构地区： 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室

出　　处： 《化学工程》 2009年第5期5-8,共4页

摘　　要： 应用程序升温吸附(TPD)技术分别测定了苯酚在空白活性炭以及负载Fe3+,Ag+的活性炭上TPD曲线,并采用理想TPD模型和改进的TPD模型估算苯酚在这些吸附材料上的脱附活化能,讨论了吸附材料表面负载Fe3+,Ag+对苯酚脱附活化能的影响。结果表明:采用改进的TPD模型估算得到的脱附活化能要低于理想TPD模型估算得到的活化能4.9%—5.9%,这是由于理想TPD模型忽略了脱附过程中可能出现的吸附质被再吸附现象。苯酚从负载硬酸Fe3+活性炭表面上脱附活化能大于其从原始活性炭表面脱附的活化能,而它从负载属于软酸的Ag+的活性炭表面上脱附所需的活化能小于其从空白活性炭表面脱附的活化能。 The temperature-programmed desorption （TPD） curves of phenol on both the original activated carbon and the activated carbon separately loaded with Fe^3＋ and Ag ^＋ were respectively measured by TPD technique. The ideal TPD model and the modified TPD model were adopted to estimate the activation energy of phenol on these adsorbents respectively. The effects of Fe^3＋ and Ag ^＋ metal ions loaded on the activated carbons on the activation energy of phenol were discussed. The results show that the activation energy estimated by the modified TPD model is approximately 4.9% -5.9% lower than that estimated by the ideal TPD model, because the ideal TPD model ignores the effect of re-adsorption of adsorbate in the process of desorption. The activation energy for resorption of phenol on the activated carbon loaded with Fe^3＋ （hard acid） is higher than that on the original activated carbon, while the activation energy for desorption of phenol on the activated carbon loaded with Ag ^＋ （soft acid） is lower than that on the original activated carbon.

关 键 词： 模型 脱附活化能 苯酚 改性活性炭 硬软酸碱理论

领　　域： [化学工程]