Experimental Study on the Liquid-Phase Adsorption Equilibrium of n-Butanol over Amberlyst™15 and Contribution of Diffusion Resistances,Chemical Engineering & Technology

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Experimental Study on the Liquid-Phase Adsorption Equilibrium of n-Butanol over Amberlyst™15 and Contribution of Diffusion Resistances
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-09-06 , DOI: 10.1002/ceat.202100253
R. Soto _{1,

2} , N. Oktar ₃ , C. Fité ₂ , E. Ramirez ₂ , R. Bringué ₂ , J. Tejero ₂

Affiliation

This work investigates the liquid-phase adsorption of n-butanol on Amberlyst™15 in the temperature range 295–323 K at different initial adsorbate concentrations. The adsorbent was characterized by N₂ physisorption, Fourier transform infrared adsorption of pyridine, scanning electron microscopy, and powder X-ray diffraction. The data obtained confirmed an adsorbent structure with two porosity levels and amorphous polymer structure. The active sites in Amberlyst™15 are of Brønsted or Brønsted-Lewis type. The liquid-phase adsorption equilibrium constants were determined at different temperatures from slurry adsorber experiments. The thermodynamic state functions were estimated and are consistent thermodynamically with physical adsorption. The macropore diffusion coefficients of n-butanol on Amberlyst™15 were estimated by using the moment technique, and the contribution of surface diffusion to the macropore diffusion coefficients was evaluated.

中文翻译：

正丁醇在 Amberlyst™15 上的液相吸附平衡及扩散阻力贡献的实验研究

这项工作研究了正丁醇在 Amberlyst™15 上在 295–323 K 温度范围内在不同初始吸附物浓度下的液相吸附。通过N ₂物理吸附、吡啶的傅里叶变换红外吸附、扫描电子显微镜和粉末X射线衍射对吸附剂进行表征。获得的数据证实了具有两个孔隙率水平和无定形聚合物结构的吸附剂结构。Amberlyst™15 中的活性位点属于 Brønsted 或 Brønsted-Lewis 型。液相吸附平衡常数是在不同温度下从淤浆吸附器实验中确定的。热力学状态函数被估计并且在热力学上与物理吸附一致。大孔扩散系数为Amberlyst™15 上的正丁醇使用矩量技术评估，并评估表面扩散对大孔扩散系数的贡献。

更新日期：2021-09-06

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