title: Phenylalanine and arginine adsorption in zeolites X, Y, and Beta.
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.
authors.affiliation: Department of Chemical Engineering and Material Science, University of Minnesota, Minneapolis, Minnesota 55455-0132, USA.
authors.forename: John E
authors.initials: JE
authors.lastname: Krohn
authors.forename: Michael
authors.initials: M
authors.lastname: Tsapatsis
mesh_terms: D000327:Adsorption; D001120:Arginine / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D015394:Molecular Structure; D010649:Phenylalanine / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D002412:Cations; D017641:Zeolites; D010649:Phenylalanine; D001120:Arginine