| Start Date: | 5/8/2014 | Start Time: | 4:30 PM |
| End Date: | 5/8/2014 | End Time: | 6:00 PM |
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Event Description
Craig M. Brown, NIST Center for Neutron Research
Title: Gas adsorption and
hydrocarbon separations in microporous materials
Abstact: Adsorption
of molecules in functionalized and high surface area microporous materials is of technological importance in a multitude of areas ranging from catalysis, drug delivery, chemical separations and energy storage to personal care products. Over the past several years we have focused our research efforts on understanding the properties of metal-organic frameworks (MOFs) for storage and separations of industrially important small molecules. The properties of metal-organic frameworks can be tuned to optimize electrostatic interactions by exposing open metal cation sites, such as in Mg2(dobdc) (dobdc4–= 2,5-dioxido-1,4-benzenedicarboxylate). A material shown to be highly effective in the capture of CO2.
The structurally related redox-active Fe2(dobdc) allows for the selective adsorption of O2 over N2 via an electron
transfer mechanism. The same material is demonstrated to be effective for the separation
of mixtures of C1 and C2 hydrocarbons, and for the high-purity separation of ethylene/ethane and propylene/propane mixtures. We will explore the details of materials that favor these interactions, and further compare them to zeolites currently employed in industry, detailing how structural features are possible within MOFs, but not in zeolites, so enabling fractionation of hexane isomers according to the degree of branching. |
Contact Information:
Name: Prof. Frank Ji
Phone: 215.895.2562
Email: hj56@drexel.edu |
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Location:
Disque Hall, Room 109, 32 South 32nd Street, Philadelphia, PA 19104 |
Audience:
AlumniCurrent StudentsFacultyProspective StudentsPublicGraduate Students |
Special Features:
Free Food |
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