Zeolitic imidazolate framework (ZIF)-based membranes and sorbents for advanced olefin/paraffin separations

Zhang, Chen

Title:

Zeolitic imidazolate framework (ZIF)-based membranes and sorbents for advanced olefin/paraffin separations

dc.contributor.advisor	Koros, William J.
dc.contributor.author	Zhang, Chen
dc.contributor.committeeMember	Jones, Christopher W.
dc.contributor.committeeMember	Nair, Sankar
dc.contributor.committeeMember	Walton, Krista S.
dc.contributor.committeeMember	Griffin, Anselm
dc.contributor.department	Chemical and Biomolecular Engineering
dc.date.accessioned	2015-06-08T18:10:39Z
dc.date.available	2015-06-09T05:30:06Z
dc.date.created	2014-05
dc.date.issued	2014-03-24
dc.date.submitted	May 2014
dc.date.updated	2015-06-08T18:10:39Z
dc.description.abstract	Propylene is one of the most important feedstocks of the petrochemical industry with an estimated 2015 worldwide demand of 100 million tons. Retrofitting conventional C3 splitters is highly desirable due to the huge amount of thermal energy required to separate propylene from propane. Membrane separation is among the alternatives that both academia and industry have actively studied during the past decades, however; many challenges remain to advance membrane separation as a scalable technology for energy-efficient propylene/propane separations. The overarching goal of this research is to provide a framework for development of scalable ZIF-based mixed-matrix membrane that is able to deliver attractive transport properties for advanced gas separations. Zeolitic imidazolate frameworks (ZIFs) were pursued instead of conventional molecular sieves (zeolites and carbon molecular sieves) to form mixed-matrix membrane due to their intrinsic compatibility with high Tg glassy polymers. A systematic study of adsorption and diffusion in zeolitic imidazolate framework-8 (ZIF-8) suggests that this material is remarkably kinetically selective for C3 and C4 hydrocarbons and therefore promising for membrane-based gas separation and adsorptive separation. As a result, ZIF-8 was used to form mixed-matrix dense film membranes with polyimide 6FDA-DAM at varied particle loadings and it was found that ZIF-8 significantly enhanced propylene/propane separation performance beyond the “permeability-selectivity” trade-off curve for polymeric materials. Eventually, this research advanced ZIF-based mixed-matrix membrane into a scalable technology by successfully forming high-loading dual-layer ZIF-8/6FDA-DAM asymmetric mixed-matrix hollow fiber membranes with attractive propylene/propane selectivity.
dc.description.degree	Ph.D.
dc.embargo.terms	2015-05-01
dc.format.mimetype	application/pdf
dc.identifier.uri	http://hdl.handle.net/1853/53422
dc.language.iso	en_US
dc.publisher	Georgia Institute of Technology
dc.subject	Olefin/paraffin separations
dc.subject	Mixed-matrix membrane
dc.subject	Zeolitic imidazolate frameworks (ZIFs)
dc.subject	Hollow fiber membrane
dc.subject	Sorbents
dc.title	Zeolitic imidazolate framework (ZIF)-based membranes and sorbents for advanced olefin/paraffin separations
dc.type	Text
dc.type.genre	Dissertation
dspace.entity.type	Publication
local.contributor.advisor	Koros, William J.
local.contributor.corporatename	School of Chemical and Biomolecular Engineering
local.contributor.corporatename	College of Engineering
relation.isAdvisorOfPublication	0059291f-6b5a-4a6c-a661-eef665ac3a18
relation.isOrgUnitOfPublication	6cfa2dc6-c5bf-4f6b-99a2-57105d8f7a6f
relation.isOrgUnitOfPublication	7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level	Doctoral