Phenylalanine and arginine adsorption in zeolites X, Y, and Beta |
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Authors: | Krohn John E Tsapatsis Michael |
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Affiliation: | Department of Chemical Engineering and Material Science, University of Minnesota, Minneapolis, Minnesota 55455-0132, USA. |
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Abstract: | This paper documents a continuation of work published in Langmuir 2005, 21, 8743-8750. We report new aspects of this amino acid adsorption study, including the effect of changing zeolite framework type and results from adsorption of mixed amino acids. In single-amino-acid adsorption experiments, zeolite Y (Si/Al=2.5) was found to adsorb no phenylalanine while admitting arginine to a similar extent as observed with zeolite beta. Using this zeolite Y, we measured mixed-amino-acid separation selectivities for arginine/phenylalanine as large as 25,000 or 2 orders of magnitude larger than the corresponding selectivities measured with zeolite beta. |
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