Michael Tsapatsis

Last updated
Bloomberg Distinguished Professor
Michael Tsapatsis
Born1965
Nationality American
Alma mater University of Patras, Greece (1988)
California Institute of Technology (M.S. 1991, Ph.D. 1994)
Known forZeolite Synthesis
Separations
Catalysis
AwardsBreck Award, 2013
Alpha Chi Sigma Award, 2013
National Academy of Engineering (2015)
Scientific career
Fields Chemical engineering, Materials science
Institutions University of Massachusetts Amherst
University of Minnesota
Johns Hopkins University
Doctoral advisors G.R. Gavalas
Mark E. Davis

Michael Tsapatsis (born 1965, Athens, Greece) is an American chemical engineer and materials scientist. Tsapatsis is the 36th Bloomberg Distinguished Professor at Johns Hopkins University in the Department of Chemical and Biomolecular Engineering. Prior to this position he was the Amundson Chair (2008–present), professor (2003-present), and McKnight Presidential Endowed Chair (2017–present) in the department of chemical engineering and Materials Science at the University of Minnesota. Prior to his appointment at the University of Minnesota, Tsapatsis was an associate professor at the University of Massachusetts Amherst.

Contents

He is well-recognized for his wide-ranging research in zeolite synthesis, especially his contributions to the design of hierarchical zeolite structures and their applications in catalysis and membrane separations. [1] According to Web of Science, he has produced over 250 published works that have been cited over 12,500 times, with an h-index of 62 as of February 23, 2018. He was elected to the National Academy of Engineering in 2015. [2]

Early life and education

Michael Tsapatsis was born in 1965 in Athens, Greece. He received his diploma in chemical engineering at the University of Patras, Greece, in 1988. Working under the supervision of G.R. Gavalas at the California Institute of Technology, Tsapatsis received his M.S. in chemical engineering in 1991 and his Ph.D. in chemical engineering in 1994. His dissertation was titled "Composite inorganic membranes for gas separations: Chemical vapor deposition of hydrogen permselective oxide membranes and preparation of supported zeolite NaA films." [3] Tsapatsis completed post-doctoral training with Mark E. Davis at the California Institute of Technology. He subsequently joined the faculty at the University of Massachusetts Amherst in 1994. Tsapatsis and his wife, Efrosini, have two children.

Contributions to chemical engineering

Tsapatsis is internationally recognized for his outstanding contributions and achievements as a chemical engineer. [4] His early work as an assistant professor at the University of Massachusetts up to recent research at the University of Minnesota addressed the preparation of zeolite films as membranes for molecular separation. Over a decade of work addressing the challenge of disintegration of fabricated sheets eventually led to multiple discoveries allowing for the preparation of "layered nanosheets" that are just a few silicon atoms thick. [5] Fundamental research alongside engineering and process development has led to advances in separation with membranes for applications including xylene separation, biofuels purification, and sour gas cleaning. [6]

Tsapatsis has also developed hierarchical zeolite particles with unique properties of value to chemical properties that utilize adsorption and catalysis. In 2011, he discovered a synthesis method for preparing nanosheets of microporous materials that could be organized as sheets for filtration application. [7] In 2012, Tsapatsis led a team of researchers to develop a hierarchical zeolite nanoparticle called Self-Pillared Pentasil (SPP). [8] Consisting of nanoscale pores, SPP was characterized and shown to have tunable properties similar to conventional zeolites used in gas separation and fuel refining, but integrated large pores (mesopores) provided enhanced diffusion capability for molecular transport.

The breadth of accomplishments extends beyond zeolite synthesis by developing applications in structured catalysts, oriented molecular sieve films, and molecular sieve/polymer nanocomposites for membrane applications, and adsorbents for commercial cleaning processes. [9] He has been part of catalysis research teams that have developed new processes to prepare renewable chemicals including isoprene, p-xylene, and bio-derived surfactants. His zeolites have also been selected for enhancing existing applications including energy-demanding processes such as ethanol dehydration. [10]

Awards, honors, and professional service

For his outstanding research and education efforts, Tsapatsis has received numerous awards including: [11]

In addition to being elected a member of the National Academy of Engineering in 2015, he is also a fellow of the American Association for the Advancement of Science and in 2013 was elected as a council member of the International Zeolite Association.

Tsapatsis is well known for his expertise in zeolite synthesis with invitations to present over 150 lectures including the Dow Lecture (Rice University), the ExxonMobil Lecture (UMass Amherst), the S.V. Sotirchos Lecture, and the G.C.A. Schuit Lectures (University of Delaware). He has also served the broader scientific community as an editor for the journal Microporous and Mesoporous Materials, the official journal of the International Zeolite Association. He has also a member of the editorial board for the journal Annual Review of Chemical and Biomolecular Engineering and an advisory board member of Industrial and Engineering Chemistry Research. [12]

Key publications

Michael Tsapatsis has more than 23,000 citations in Google Scholar and an h-index of 96. [13] Tsapatsis has authored numerous journal articles describing significant advances in zeolite synthesis, materials science, and chemical engineering which includes but is not limited to:

Related Research Articles

<span class="mw-page-title-main">Molecular engineering</span> Field of study in molecular properties

Molecular engineering is an emerging field of study concerned with the design and testing of molecular properties, behavior and interactions in order to assemble better materials, systems, and processes for specific functions. This approach, in which observable properties of a macroscopic system are influenced by direct alteration of a molecular structure, falls into the broader category of “bottom-up” design.

<span class="mw-page-title-main">Adsorption</span> Phenomenon of surface adhesion

Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the adsorbate on the surface of the adsorbent. This process differs from absorption, in which a fluid is dissolved by or permeates a liquid or solid. While adsorption does often precede absorption, which involves the transfer of the absorbate into the volume of the absorbent material, alternatively, adsorption is distinctly a surface phenomenon, wherein the adsorbate does not penetrate through the material surface and into the bulk of the adsorbent. The term sorption encompasses both adsorption and absorption, and desorption is the reverse of sorption.

<span class="mw-page-title-main">Membrane gas separation</span> Technology for splitting specific gases out of mixtures

Gas mixtures can be effectively separated by synthetic membranes made from polymers such as polyamide or cellulose acetate, or from ceramic materials.

<span class="mw-page-title-main">Molecular sieve</span> Filter material with homogeneously sized pores in the nanometer range

A molecular sieve is a material with pores of uniform size. These pore diameters are similar in size to small molecules, and thus large molecules cannot enter or be adsorbed, while smaller molecules can. As a mixture of molecules migrates through the stationary bed of porous, semi-solid substance referred to as a sieve, the components of the highest molecular weight leave the bed first, followed by successively smaller molecules. Some molecular sieves are used in size-exclusion chromatography, a separation technique that sorts molecules based on their size. Another important use is as a desiccant. Most of molecular sieves are aluminosilicate zeolites with Si/Al molar ratio less than 2, but there are also examples of activated charcoal and silica gel.

<span class="mw-page-title-main">Mesoporous material</span>

A mesoporous material is a nanoporous material containing pores with diameters between 2 and 50 nm, according to IUPAC nomenclature. For comparison, IUPAC defines microporous material as a material having pores smaller than 2 nm in diameter and macroporous material as a material having pores larger than 50 nm in diameter.

Aluminium phosphate is a chemical compound. In nature it occurs as the mineral berlinite. Many synthetic forms of aluminium phosphate are known. They have framework structures similar to zeolites and some are used as catalysts, ion-exchangers or molecular sieves. Commercial aluminium phosphate gel is available.

<span class="mw-page-title-main">Nanoporous materials</span>

Nanoporous materials consist of a regular organic or inorganic bulk phase in which a porous structure is present. Nanoporous materials exhibit pore diameters that are most appropriately quantified using units of nanometers. The diameter of pores in nanoporous materials is thus typically 100 nanometers or smaller. Pores may be open or closed, and pore connectivity and void fraction vary considerably, as with other porous materials. Open pores are pores that connect to the surface of the material whereas closed pores are pockets of void space within a bulk material. Open pores are useful for molecular separation techniques, adsorption, and catalysis studies. Closed pores are mainly used in thermal insulators and for structural applications.

<span class="mw-page-title-main">Metal–organic framework</span> Class of chemical substance

Metal–organic frameworks (MOFs) are a class of porous polymers consisting of metal clusters coordinated to organic ligands to form one-, two- or three-dimensional structures. The organic ligands included are sometimes referred to as "struts" or "linkers", one example being 1,4-benzenedicarboxylic acid (BDC).

<span class="mw-page-title-main">Mesoporous silica</span> Nano-scale porous silica compound

Mesoporous silica is a form of silica that is characterised by its mesoporous structure, that is, having pores that range from 2 nm to 50 nm in diameter. According to IUPAC's terminology, mesoporosity sits between microporous (<2 nm) and macroporous (>50 nm). Mesoporous silica is a relatively recent development in nanotechnology. The most common types of mesoporous nanoparticles are MCM-41 and SBA-15. Research continues on the particles, which have applications in catalysis, drug delivery and imaging. Mesoporous ordered silica films have been also obtained with different pore topologies.

<span class="mw-page-title-main">Zeolitic imidazolate framework</span> Class of metal-organic frameworks

Zeolitic imidazolate frameworks (ZIFs) are a class of metal-organic frameworks (MOFs) that are topologically isomorphic with zeolites. ZIF glasses can be synthesized by the melt-quench method, and the first melt-quenched ZIF glass was firstly made and reported by Bennett et al. back in 2015. ZIFs are composed of tetrahedrally-coordinated transition metal ions connected by imidazolate linkers. Since the metal-imidazole-metal angle is similar to the 145° Si-O-Si angle in zeolites, ZIFs have zeolite-like topologies. As of 2010, 105 ZIF topologies have been reported in the literature. Due to their robust porosity, resistance to thermal changes, and chemical stability, ZIFs are being investigated for applications such as carbon dioxide capture.

Edward L. Cussler is an American chemical engineer and professor in the department of chemical engineering and materials science at the University of Minnesota. He is internationally known for his work in fluid mechanics, transport phenomena, and gas separations, especially in the areas of membranes and gas sorption. Cussler is an author of more than 250 academic papers, dozens of patents, and five books including the acclaimed text: “Diffusion”. He has served as director, vice president and president of the American Institute of Chemical Engineers, and he presented the AIChE Institute Lecture in 2014. Cussler and his wife Betsy, a former teacher at Edina High School, are long-time residents of Minneapolis, Minnesota.

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References

  1. "AIChE - Michael Tsapatsis" . Retrieved 22 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  2. "National Academy of Engineering Michael Tsapatsis" . Retrieved 22 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  3. "Thesis / Caltech - Michael Tsapatsis" . Retrieved 22 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  4. "Professor Michael Tsapatsis elected to the National Academy of Engineering" . Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  5. "Professor Michael Tsapatsis: The Power of Membranes" . Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  6. "New Process Could Greatly Reduce Energy Used in Production of Biofuels" . Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  7. "Breakthrough culminates a decade's worth of research" . Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  8. "University of Minnesota discovery to improve efficiencies in fuel, chemical and pharmaceutical industries" . Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  9. Varoon, K.; Zhang, X.; Elyassi, B.; Brewer, D. D.; Gettel, M.; Kumar, S.; Lee, J. A.; Maheshwari, S.; Mittal, A.; Sung, C.-Y.; Cococcioni, M.; Francis, L. F.; McCormick, A. V.; Mkhoyan, K. A.; Tsapatsis, M. (2011). "Dispersible Exfoliated Zeolite Nanosheets and Their Application as a Selective Membrane". Science. 334 (6052): 72–75. Bibcode:2011Sci...334...72V. doi:10.1126/science.1208891. PMID   21980106. S2CID   14478762.
  10. "Researchers identify materials to improve biofuel and petroleum processing". 2015-01-23. Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  11. "Faculty Directory - Michael Tsapatsis" . Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  12. "Advisory board of I&EC" (PDF). Retrieved 5 February 2018.{{cite journal}}: Cite journal requires |journal= (help)
  13. "Michael Tsapatsis". scholar.google.com. Retrieved 2021-05-19.
  14. Lovallo, Mark C.; Tsapatsis, Michael (1996). "Preferentially Oriented Submicron Silicalite Membranes". AIChE Journal. 42 (11): 3020–3029. Bibcode:1996AIChE..42.3020L. doi:10.1002/aic.690421104.
  15. Kuznicki, Steven M.; Bell, Valerie A.; Nair, Sankar; Hillhouse, Hugh W.; Jacubinas, Richard M.; Braunbarth, Carola M.; Toby, Brian H.; Tsapatsis, Michael (2001). "A titanosilicate molecular sieve with adjustable pores for size-selective adsorption of molecules". Nature. 412 (6848): 720–724. Bibcode:2001Natur.412..720K. doi:10.1038/35089052. PMID   11507636. S2CID   31916354.
  16. Salama, G.; Morad, M. (2003). "Microstructural Optimization of Zeolite Membrane for Organic Vapor Separation". Science. 191 (4226): 485–487. doi: 10.1126/science.1082169 . PMID   12624179. S2CID   25364470.
  17. Davis, Tracy M.; Drews, Timothy O.; Ramanan, Harikrishnan; He, Chuan; Dong, Jingshan; Schnablegger, Heimo; Katsoulakis, Markos A.; Kokkoli, Efrosini; McCormick, Alon V.; Penn, R. Lee; Tsapatsis, Michael (2006). "Mechanistic Principles of Nanoparticle Evolution to Zeolite Crystals". Nature Materials. 5 (5): 400–408. Bibcode:2006NatMa...5..400D. doi:10.1038/nmat1636. PMID   16617343. S2CID   5912869.
  18. Fan, Wei; Snyder, Mark A.; Kumar, Sandeep; Lee, Pyung-Soo; Yoo, Won Cheol; McCormick, Alon V.; Lee Penn, R.; Stein, Andreas; Tsapatsis, Michael (2008). "Hierarchical nanofabrication of microporous crystals with ordered mesoporosity". Nature Materials. 7 (12): 984–991. Bibcode:2008NatMa...7..984F. doi:10.1038/nmat2302. PMID   18953343.
  19. Varoon, K.; Zhang, X.; Elyassi, B.; Brewer, D. D.; Gettel, M.; Kumar, S.; Lee, J. A.; Maheshwari, S.; Mittal, A.; Sung, C.-Y.; Cococcioni, M.; Francis, L. F.; McCormick, A. V.; Mkhoyan, K. A.; Tsapatsis, M. (2011). "Dispersible Exfoliated Zeolite Nanosheets and their Application as a Selective Membrane". Science. 334 (6052): 72–75. Bibcode:2011Sci...334...72V. doi:10.1126/science.1208891. PMID   21980106. S2CID   14478762.
  20. Zhang, X.; Liu, D.; Xu, D.; Asahina, S.; Cychosz, K. A.; Agrawal, K. V.; Al Wahedi, Y.; Bhan, A.; Al Hashimi, S.; Terasaki, O.; Thommes, M.; Tsapatsis, M. (2012). "Synthesis of Self-Pillared Zeolite Nanosheets by Repetitive Branching". Science. 336 (6089): 1684–1687. Bibcode:2012Sci...336.1684Z. doi:10.1126/science.1221111. PMID   22745424. S2CID   5983557.
  21. Jeon, Mi Young; Kim, Donghun; Kumar, Prashant; Lee, Pyung Soo; Rangnekar, Neel; Bai, Peng; Shete, Meera; Elyassi, Bahman; Lee, Han Seung; Narasimharao, Katabathini; Basahel, Sulaiman Nasir; Al-Thabaiti, Shaeel; Xu, Wenqian; Cho, Hong Je; Fetisov, Evgenii O.; Thyagarajan, Raghuram; Dejaco, Robert F.; Fan, Wei; Mkhoyan, K. Andre; Siepmann, J. Ilja; Tsapatsis, Michael (2017). "Ultra-Selective High-Flux Membranes from Directly Synthesized Zeolite Nanosheets". Nature. 543 (7647): 690–694. Bibcode:2017Natur.543..690J. doi:10.1038/nature21421. OSTI   1373573. PMID   28297708. S2CID   205254200.