Selective olefin permeation through Ag(I) contained silicone rubber-graft-poly(acrylic acid) membranes |
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| Institution: | 1. Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, ROC;2. Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan, ROC;1. Chemistry Department, Shahrood Branch, Islamic Azad University, Shahrood, Iran;2. Beijing Kein Research Center for Natural Sciences, Beijing 100022, PR China;3. Department of Organic Chemistry, University of Valencia, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain;4. Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran;1. Ivanovo State University of Chemistry and Technology, Research Institute of Chemistry of Macroheterocyclic Compounds, Ivanovo 153000, Russia;2. Moscow Lomonosov State University of Fine Chemical Technologies, Moscow 119571, Russia;3. Ivanovo State University, Ivanovo 153025, Russia;1. LAQV/Requimte, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal;2. Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarina Str., 87-100 Torun, Poland |
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| Abstract: | The silicone rubber (SR) based graft copolymer, SR-graft-poly(acrylic acid) (SR-g-AA), was modified by incorporating silver ion (SR-g-AA-Ag+) for C4 olefin/paraffin gases separation. Olefin could be transported across the complex membrane by the silver ion facilitated transport. The permeation properties, as measured by gas chromatography equipped with a gas permeability analyzer, implied a facilitating effect for olefin. Typical trans-2-butene/n-butane selectivity in the 95.6% grafted complex membrane at 25°C is 4.0. Also, the influences of AA% grafting, measuring temperature and pressure to the permeation properties of C4 gases were studied. In addition, the sorption behaviors of C4 gases in SR based membranes are presented and discussed by the Flory-Huggins equation. Finally, the selectivity of solubility and diffusivity in these SR based membranes are also discussed. |
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