Sorption Rate Measurements on Single Zeolite Crystals
{'Code': '07020000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CBET', 'LongName': 'Div Of Chem, Bioeng, Env, & Transp Sys'}}
{'SignBlockName': 'Robert M. Wellek', 'PO_EMAI': None, 'PO_PHON': None}
The objective of this project is to develop a new research technique            for studying zeolite mass transport.  Sorption rate measurements are            conducted on a single zeolite crystal suspended in a flowing carrier            gas by an electrodynamic containment device.  An electronic feedback            control circuit senses particle displacement due to weight increase             and automatically adjusts the electrostatic field to keep the particle          at the null position.  The sorption uptake curve is then computed from          a knowledge of the levitation voltage as a function of time.                                                                                                    Mass transport phenomena are directly responsible for the unique                molecular sieve and shape selective properties of zeolite.  However,            the characterization of intracrystalline diffusion in zeolite is                complicated by extracrystalline mass transport resistance, crystalline          size distribution, sorption heat effects, and finite instrumentation            response time.  Consequently, large discrepancies are often observed            between diffusivities obtained by the various conventional methods and          between diffusivities reported by different investigators using the             same techniques of measurement.  This new technique has the potential           for eliminating all of these problems.  By studying single                      crystallites, extracrystalline resistance are eliminated and so is the          need to contend with a distribution of particle sizes.  Sorption heat           effects can be probed in an independent fashion by varying carrier gas          flowrate.  The new apparatus contains no moving parts, hence,                   instrumentation response times should be dramatically improved.
[{'FirstName': 'Henry', 'LastName': 'Haynes', 'PI_MID_INIT': 'W', 'PI_SUFX_NAME': 'Jr.', 'PI_FULL_NAME': 'Henry W Haynes', 'EmailAddress': 'haynes@uwyo.edu', 'NSF_ID': '000354501', 'StartDate': '07/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'Michael', 'LastName': 'Stephens', 'PI_MID_INIT': 'M', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Michael M Stephens', 'EmailAddress': None, 'NSF_ID': '000342618', 'StartDate': '07/01/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}]
{'Name': 'University of Wyoming', 'CityName': 'LARAMIE', 'ZipCode': '820712000', 'PhoneNumber': '3077665320', 'StreetAddress': '1000 E UNIVERSITY AVE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Wyoming', 'StateCode': 'WY', 'CONGRESSDISTRICT': '00', 'CONGRESS_DISTRICT_ORG': 'WY00', 'ORG_UEI_NUM': 'FDR5YF2K32X5', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF WYOMING', 'ORG_PRNT_UEI_NUM': 'FDR5YF2K32X5'}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '1414', 'Text': 'INTERFAC PROCESSES & THERMODYN'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8802626.xml'}