Selective adsorption of unsaturated linear C4 molecules on the all-silica DD3R

文献情報

出版日 2000-03-31

DOI 10.1039/A909812G

インパクトファクター 3.676

著者

W. Zhu, F. Kapteijn, J. A. Moulijn, J. C. Jansen

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要旨

The adsorption of but-1-ene, buta-1,3-diene, cis-but-2-ene and trans-but-2-ene on the all-silica DD3R has been investigated using a tapered element oscillating microbalance (TEOM). The single-component adsorption isotherms of buta-1,3-diene and trans-but-2-ene are reported for the first time at temperatures in the range from 303 to 473 K and at pressures up to 1.5×105 Pa. The Langmuir isotherm appropriately describes their equilibrium data of adsorption on the all-silica DD3R. The analysis of thermodynamic properties such as isosteric heat and entropy of adsorption indicates that the adsorbent is energetically uniform. Transient experiments reveal that the 8-ring windows of the all-silica DD3R are accessible to buta-1,3-diene and trans-but-2-ene molecules, while they exclude but-1-ene and cis-but-2-ene molecules. High adsorption selectivities suggest that the all-silica DD3R might be an effective adsorbent for the separation or purification of C4 mixtures.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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