Skip to main content
Start main content

Events

HKU Science Distinguished Lectures - Rational Mechanism-Based Catalyst Design for Waste Polymer Recycling in a Circular Economy

HKU Science Distinguished Lectures - Rational Mechanism-Based Catalyst Design for Waste Polymer Recycling in a Circular Economy
Date & Time
January 11, 2024 (Thursday) | 5:30 pm (HKT)
Venue
Lecture Theatre P1, Chong Yuet Ming Chemistry Building
Speaker
Professor Tobin J MARKS
Vladimir N. Ipatieff Professor of Catalytic Chemistry and Chemical and Biological Engineering Northwestern University, US

 

HKU Science Distinguished Lectures - Rational Mechanism-Based Catalyst Design for Waste Polymer Recycling in a Circular Economy

 
The current increase in plastics production/consumption has generated vast quantities of waste with severe environmental consequences.  In 2018, 395 million tons of plastics were produced annually, and this quantity will likely triple by 2050. Since >90% of these plastics derive from fossil feedstocks, the impact on finite natural resources is also a concern. In a classical linear economic model in which plastics are discarded after use, by 2050, the ocean will contain more plastics than fish, and plastics production will consume ~20% of global petroleum production. To counter such scenarios, a circular economy in which waste plastics are recycled and repurposed is urgently needed. Plastics such as polyethylene terephthalate (PET), Nylon, polyethylene, α-olefin-ethylene copolymers, and isotactic-polypropylene are among the most heavily used plastics worldwide, with multi-billion-dollar markets, hence in need of efficient, large-scale recycling. Yet, PET is currently the most recycled plastic, however only ~7% is currently bottle-to-bottle recycled.  
 
This lecture focuses on mechanism and thermodynamics-based strategies to deconstruct/recycle PET and other polyesters,  linear and branched polyesters, polyolefins, and nylons using structurally well-defined earth-abundant molecule-derived heterogeneous and homogeneous catalysts and complementary DFT analysis. These catalytic processes are solvent-free, proceed in high conversions and selectivities under relatively mild conditions, and the catalysts are multiply recyclable. Details of the reaction mechanisms and those factors governing catalytic selectivity are discsussed.
 
For inquiries, please contact 3910 3549 or email chemmail@hku.hk
 
ALL are welcome.
 
*This is a joint distinguished lecture of the Faculty of Science and the Department of Chemistry.
Professor Tobin J MARKS

Speaker Professor Tobin J MARKS

Vladimir N. Ipatieff Professor of Catalytic Chemistry and Chemical and Biological Engineering Northwestern University, US

Professor Tobin Marks is a renowned figure in the fields of Catalytic Chemistry and Chemical and Biological Engineering, Materials Science and Engineering, and Applied Physics. He received his BSc in Chemistry from the University of Maryland and his PhD in Inorganic Chemistry from MIT. Professor Marks has received numerous awards and recognitions throughout his career, including the US National Medal of Science, the Spanish Asturias Prize, the MRS Von Hippel Award, the Dreyfus Chemical Sciences Prize, the NAS Chemical Sciences Award, the ACS Priestley Medal, the Israel Harvey Prize, and the German Chemical Society Ziegler Prize. He is a Fellow of the US, German, Italian, European, and Indian Academies of Sciences, the US National Academy of Engineering, the American Academy of Arts and Sciences, the American Philosophical Society, and the US National Academy of Inventors. He is also a Fellow of the UK RSC, ACS, Chinese, and Israel Chemical Societies, as well as a MRS Fellow. Professor Marks has received approximately 250 other awards and recognitions, and has authored over 1,500 peer-reviewed publications and 210 US patents. He has also been awarded honorary doctorates from several universities, including HKUST, the University of South Carolina, Ohio State University, and the Technical University of Munich. Professor Marks is a prolific entrepreneur, having founded or co-founded 15 start-ups, and his technologies have generated an estimated USD100 billion in sales.