| A NEW MODEL FOR ESTIMATION OF DIFFUSION COEFFICIENT OF PHENOL DESORPTION WITHIN POLYMERIC RESIN UNDER ULTRASOUND |
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| 作者姓名： | LI Xiangbin ZHAO Yuechun XIA Qibin XI Hongxia LI Zhong . Research Institute of Chemical Engineering South China University of Technology Guangzhou China . College of Science South China Agricultural University Guangzhou China |
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| 作者单位： | LI Xiangbin1 ZHAO Yuechun2 XIA Qibin1 XI Hongxia1 LI Zhong1 1. Research Institute of Chemical Engineering，South China University of Technology Guangzhou 510640，China 2. College of Science，South China Agricultural University，Guangzhou 510642，China |
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| 基金项目： | The National Natural Science Foundation of China (No. 29936100)，The Natural Science Foundation of Guangdong Province (No. 990629). |
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| 摘 要： | 1. INTRODUCTION Ultrasound is a kind of mechanical wave whose frequency is more than 20 kilohertz. It can enhance the mass transfer, increase the rate and conversion of chemical reaction, change the reaction pathway 1,2] and accelerate the conversion of…
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A NEW MODEL FOR ESTIMATION OF DIFFUSION COEFFICIENT OF PHENOL DESORPTION WITHIN POLYMERIC RESIN UNDER ULTRASOUND |
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| LI Xiangbin ZHAO Yuechun XIA Qibin XI Hongxia LI Zhong . Research Institute of Chemical Engineering,South China University of Technology Guangzhou ,China . College of Science,South China Agricultural University,Guangzhou ,China.A NEW MODEL FOR ESTIMATION OF DIFFUSION COEFFICIENT OF PHENOL DESORPTION WITHIN POLYMERIC RESIN UNDER ULTRASOUND[J].离子交换与吸附(英文版),2002(1). |
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| Authors: | LI Xiangbin ZHAO Yuechun XIA Qibin XI Hongxia LI Zhong Research Institute of Chemical Engineering South China University of Technology Guangzhou China College of Science South China Agricultural University Guangzhou China |
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| Institution: | LI Xiangbin1 ZHAO Yuechun2 XIA Qibin1 XI Hongxia1 LI Zhong1 1. Research Institute of Chemical Engineering,South China University of Technology Guangzhou 510640,China 2. College of Science,South China Agricultural University,Guangzhou 510642,China |
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| Abstract: | A new model, phase equilibrium-kinetics model (PEKM), for estimation of diffusion coefficient was proposed in this paper. Kinetic experiments of phenol desorption on NKAII resin in the presence and the absence of ultrasound were separately conducted, and diffusion coefficients of phenol within an adsorbent particle were estimated by means of proposed PEKM and classic simplified model. Results show that the use of ultrasound not only changes the phase equilibrium state of NKA II resin/phenol/water system which had been equilibrium at normal condition, but also enhances diffusion of phenol within the resin. The diffusion coefficient of phenol in the resin in the field of ultrasound increases in an order of magnitude in comparison with the diffusion coefficient determined under no ultrasound. Experimental results also indicated that the diffusion coefficients estimated by PEKM were more accurate than that estimated by the classic simplified model. |
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| Keywords: | Ultrasound Diffusion coefficient PEKM Classic simplified model Phenol Desorption NKAII resin |
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