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Modulating and Orienting a Zn-based Metal Organic Framework for Selective CO2/CH4 Separation

Presenters Name: 
Karl Westendorff
Co Presenters Name: 
Primary Research Mentor: 
Gaurav Giri
Secondary Research Mentor: 
Luke Huelsenbeck
9:30 - 10:15
Time of Presentation: 
2019 - 9:30am to 10:15am
Newcomb Hall Ballroom
Presentation Type: 
Presentations Academic Category: 
Grant Program Recipient: 
Harrison Undergraduate Research Grant

This work investigates the morphological control of the anisotropic [Zn2(NDC)2(DABCO)]n MOF and its subsequent CO2/CH4 gas separation selectivities. The MOF's crystal morphology was controlled by the use of modulating species. The addition of acetic acid or pyridine modulators successfully produced rod or plate morphologies, respectively, with each morphology possessing a different major surface pore aperture. Single-component equilibrium and kinetic adsorption data for CO2 and CH4 were collected. Equilibrium analysis indicated a slight selectivity towards CO2, but kinetic data showed surprisingly lower diffusion rates for CO2 compared to CH4. MOFs with rod morphologies were also oriented on a substrate via dropcast and solution shearing methods, lending to their viability as large area, thin-film separation membranes.