CO2 capture from air, flue gas, and other dilute gas mixtures
The group has played a leading role in the development of materials and processes for the extraction of CO2 from the ambient air, or direct air capture (DAC). The work targets fundamental issues in adsorption science as well as novel, scalable processes. A long-standing collaboration with Global Thermostat LLC has focused on material and process development.
196. S. A. Didas, S. Choi, W. Chaikittisilp, C. W. Jones, “Amine-Oxide Hybrid Materials for CO2 Capture from Ambient Air.” Acc. Chem. Res.(2015) 48, 2680-2687.
225. E. S. Sanz-Pérez, C. R. Murdock, S. A. Didas, C. W. Jones, “Direct Capture of CO2from Ambient Air.” Chem. Rev. (2016) 116, 11840-11876
The group has also made significant contributions to the use of solid, amine-based adsorbents for CO2 capture from dilute gases such flue gases derived from fossil fuel combustion.
110. P. Bollini, S. A. Didas, C. W. Jones, “Amine-Oxide Hybrid Materials for Acid Gas Separations.” J. Mater. Chem. (2011) 21, 15100-15120.
137. Y. Labreche, R. P. Lively, F. Rezaei, G. Chen, C. W. Jones, W. J. Koros, “Post-Spinning Infusion of Poly(ethyleneimine) into Polymer/Silica Hollow Fiber Sorbents for Carbon Dioxide Capture.” Chem. Eng. J. (2013) 221, 166-175.
Amine adsorbents in targeted separations (other acid gases, VOCs, etc.)
Leveraging the group’s longstanding expertise in adsorbents for CO2 capture, we have developed related materials for separation of specific compounds from bio-oils, mercaptans from natural gas, as well as VOCs from breathing air, amongst other applications.
99. J. H. Drese, A. Talley, C. W. Jones, “Aminosilica Materials as Adsorbents for the Selective Removal of Aldehydes and Ketones from Simulated Bio-oil.” ChemSusChem (2011) 4, 379-385.
Catalytic conversion of light alkanes in shale gas
The conversions of light alkanes to alkenes, aromatics, syngas, and other oxygenates on heterogeneous catalysts are important reactions for the chemical, fuel, and other industries. Depending on the desired product, metal, oxide, or acid catalysts can be used. These conversions are becoming increasingly important, in part because when emerging shale gas feedstocks that are comprised of mostly C1-C3 alkanes are used in existing petroleum-based infrastructure like steam creaking and fluid catalytic cracking (FCC), they do not adequately meet the demand of alkenes. Thus, the oxidative or nonoxidative dehydrogenation of alkanes to “on-purpose” production of light alkenes (ethylene and propylene), which are important chemical building blocks for fuels and chemicals, represents an attractive route to utilize available, cheap resources. Designing effective catalysts that are selective to dehydrogenation instead of side reactions like cracking to smaller molecules, represents an important thrust in increasing the application of this technology. We have focused on development of catalysts based on earth abundant metals for the endothermic dehydrogenation of propane, and steam-cracking of ethane, amongst other applications.
198. S. Tan, S.-J. Kim, J. S. Moore, Y. Liu, R. S. Dixit, J. G. Pendergast, D. S. Sholl, S. Nair, C. W. Jones, “Propane Dehydrogenation over In2O3-Ga2O3-Al2O3Mixed Oxides.” ChemCatChem (2016) 8, 214-221.
224. S. Tan, B. Hu, W.-G. Kim, S. H. Pang, J. S. Moore, Y. Liu, R. S. Dixit, J. G. Pendergast, D. S. Sholl, S. Nair, C. W. Jones, “Propane Dehydrogenation over Alumina-supported Iron/Phosphorous Catalysts: Structural Evolution of Iron Species Leading to High Activity and Propylene Selectivity.” ACS Catal. (2016) 6, 5673-5683.
Catalytic conversion of biomass-derived compounds
The group has worked extensively on the conversion of lignocellulosic biomass, often in collaboration with the Renewable Bioproducts Institute (RBI) at Georgia Tech. Early studies examined the fractionation of woody biomass in aqueous and ionic liquid media. The hydrogenation of lignin-derived species has also been a focus, with recent efforts aimed at the selective hydrogenation of sugar-derived furanic compounds using non-precious metal catalysts.
252. T. P. Sulmonetti, B. Hu, S. Lee, P. K. Agrawal, C. W. Jones, “Reduced Cu-Co-Al Mixed Metal Oxides for the Ring-Opening of Furfuryl Alcohol to Produce Renewable Diols.” ACS Sustain. Chem. Eng. (2017) 5, 8959-8969
Engineering molecular catalysts for specific applications in organic synthesis
Since the earliest days, a major focus of research in the group has been design and understanding of supported molecular catalysts. Two major focal areas are on (i) cooperative and cascade catalysis using multi-functional supported molecular catalysts, in collaboration with chemists at NYU and computational scientists in MSE at GT, and (ii) supported metal complex catalysts for C-H activation. The latter activity is part of Emory University’s Center for Catalytic C-H Functionalization, and involves close collaborations with organic chemists. Specific goals include enhancing catalyst TON or facilitating C-H functionalization in flow.
187. E.G. Moschetta, S. Negretti, K.M. Chepiga, N.A. Brunelli, Y. Labreche, Y. Feng, F. Rezaei, R.P. Lively, W.J. Koros, H.M.L Davies, C.W. Jones, “Composite Polymer/Oxide Hollow Fiber Contactors: Versatile and Scalable Flow Reactor for Heterogeneous Catalytic Reactions in Organic Synthesis.” Angew. Chem. Int. Ed.(2015) 54, 6470-6474
207. L.-C. Lee, J. He, J.-Q. Yu, C. W. Jones, “Functionalized Polymer-supported Pyridine Ligands for Palladium-catalyzed C(sp3)–H Arylation.” ACS Catal.(2016) 6, 5245-5250
247. D. Rackl, C.-J.Yoo, C. W. Jones, H. M. L. Davies, “Synthesis of Donor-/Acceptor-Substituted Diazo Compounds in Flow and their Application in Enantioselective Dirhodium-Catalyzed Cyclopropanation and C–H Functionalization.” Org. Lett.(2017) 19, 3055-3058
With broad expertise in zeolites, MOFs and organic-functionalized porous oxides, we often collaborate with other groups that focus on membrane separations on an array of projects. Projects with Koros, Sholl, Nair and Lively have been explored over the years, targeting gas separations, pervaporation and organic/aqueous separations. Generally speaking, the group does not lead membrane projects, though we are involved in numerous collaborations on the topic.
78. T.-H Bae, J. Liu, J. S. Lee, W. J. Koros, C. W. Jones, S. Nair, “Facile High-Yield Solvothermal Deposition of Inorganic Nanostructures on Zeolite Crystals for Mixed Matrix Membrane Fabrication.” J. Am. Chem. Soc. (2009) 131, 14662-14663.
95. T.H. Bae, J. S. Lee, W. J. Koros, C. W. Jones, S. Nair, “High-Performance Gas Separation Membrane Containing Sub-Micron Metal Organic Framework Crystals.” Angew. Chem. Int. Ed. (2010) 49, 9863-9866.
128. A. J. Brown, J. R. Johnson, W. J. Koros, C. W. Jones, S. Nair, “Continuous Polycrystalline Zeolitic Imidazolate Framework-90 (ZIF-90) Membranes on Polymeric Hollow Fibers.” Angew. Chem. Int. Ed. (2012) 147, 10767-10770.
163. A. J. Brown, N. A. Brunelli, K. Eum, F. Rashidi, J. R. Johnson, W. J. Koros, C. W. Jones, S. Nair, “Interfacial Microfluidic Processing of Metal-Organic Framework Hollow Fiber Membranes.” Science (2014) 345, 72-75.
215. K. Eum, A. Rownaghi, D. Choi, R. R. Bhave, C. W. Jones, S. Nair, “Fluidic Processing of High-Performance ZIF-8 Membranes on Polymeric Hollow Fibers: Mechanistic Insights and Microstructure Control.” Adv. Funct. Mater. (2016) 26, 5011-5018.