估算苯酚在改性活性炭上脱附活化能的两种模型比较
omparison of Activation Energy for Desorption of Phenol on Modified Activated Carbons For Estimated By Two TPD Models
本文应用TPD技术分别测定了苯酚在负载Fe3+、Ag+金属离子的活性炭以及空白活性炭上TPD曲线，分别采用理想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，讨论了表面负载Fe3+、Ag+金属离子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采用理想TPD模型估算得到的活化能约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+离子活性炭表面上脱附所需的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原始活性炭表面脱附的活化能。
he TPD curves of phenol on the activated carbon and ones separately loaded Fe3+ and Ag+ were measured by the temperature-programmed desorption (TPD) technique. Ideal TPD model and modified TPD model were adopted to estimate the activation energy of phenol on these adsorbents respectively. And the effects of Fe3+ and Ag+ metal ions loaded on the activated carbons on the activation energy of phenol were discussed. Results showed that the activation energy estimated by modified TPD model was lower than that estimated by the ideal TPD model approximately 4.9％～5.9％ because the ideal TPD model ignored the effect of re-adsorption of adsorbate in the process of desorption. The activation energy for desorption of phenol on the activated carbon loaded Fe3+, hard acid, was higher than that on the original activated carbon, while the activation energy for desorption of phenol on the activated carbon loaded Ag+, soft acid, was lower than that on the original activated carbon.
潘红艳、夏启斌
有机化学工业精细化学工业
PD模型，脱附活化能，苯酚，改性活性炭，硬软酸碱理论
PD model the activation energy phenol modified activated carbon hard soft acid base principle
潘红艳,夏启斌.估算苯酚在改性活性炭上脱附活化能的两种模型比较[EB/OL].(2005-12-26)[2025-08-23].http://www.paper.edu.cn/releasepaper/content/200512-650.点此复制
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