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UID:20250830T073648EDT-25721Dzzgd@132.216.98.100
DTSTAMP:20250830T113648Z
DESCRIPTION:Abstract:\n\nLignin valorization to chemicals and materials is 
 recognized to be essential for the economic viability of future biorefiner
 ies. In this context\, several promising catalytic approaches have been re
 ported for lignin deconstruction to aromatic monomers and other low molecu
 lar weight compounds. However\, major challenges remain such as the handli
 ng of solid lignin\, limited knowledge on catalyst deactivation/stability\
 , avoidance of stoichiometric reagents and the demonstration of continuous
  processing. This talk will present advances in addressing these challenge
 s. Specifically\, strategies to sequentially attack the C=C bonds (by ozon
 olysis) followed by C-O bonds (with solid Lewis acid catalysts) to isolate
  various value-added fractions in grass and woody lignins will be discusse
 d. A simple spray reactor is used for the ozonolysis pretreatment to cleav
 e C=C bonds in grass lignins to conveniently recover vanillin and p-hydrox
 ybenzaldehyde\, two of the most valuable monomers. Continuous depolymeriza
 tion of the remaining lignin is achieved in a slurry reactor over a Lewis 
 acidic catalyst (Zr-KIT-5) with stable activity and without the need for a
 ny reducing or oxidizing agents. The observed yield of aromatic monomers i
 s greater than those recently reported using either reductive catalyst fra
 ctionation of lignin over Pd/C catalyst using hydrogen or oxidation/hydrol
 ysis routes. The foregoing sequential valorization strategy accommodates a
  wide variety of lignins and raises the possibility of deploying modular c
 oncepts in distributed biorefineries.\n\nBio: \n\nBala Subramaniam is the 
 Dan F. Servey Distinguished Professor of Chemical Engineering at the Unive
 rsity of Kansas (KU). Subramaniam earned a B.Tech. degree in Chemical Engi
 neering from the University of Madras\, India and his Ph. D. in Chemical E
 ngineering from the University of Notre Dame. He has also held visiting pr
 ofessorships at the University of Nottingham\, United Kingdom and the Inst
 itute of Process Engineering\, ETH\, Zürich\, Switzerland. Subramaniam’s r
 esearch interests are in catalysis\, reaction engineering and crystallizat
 ion. He has nearly 190+ journal publications\, 30 issued patents and edite
 d 2 books. Subramaniam is co-founder and founding Director of the Center f
 or Environmentally Beneficial Catalysis (CEBC)\, a unique University/Indus
 try consortium that is developing and providing licensing opportunities fo
 r novel resource-efficient technologies related to fuels and chemicals. He
  also co-founded CritiTech\, a pharmaceutical company based in Lawrence\, 
 KS. Subramaniam is executive editor of ACS Sustainable Chemistry and Engin
 eering journal and chaired the 2018 Gordon Research Conference on Green Ch
 emistry. His honors include ASEE’s Dow Outstanding Young Faculty Award\, I
 ndian Institute of Chemical Engineers’ Chemcon Lectureship Award\, and KU’
 s Higuchi Research Achievement Award. Subramaniam is a Fellow of the AIChE
 \, the ACS Industrial & Engineering Chemistry Division\, and the National 
 Academy of Inventors.\n
DTSTART:20190507T170000Z
DTEND:20190507T183000Z
LOCATION:Room 10\, Maass Chemistry Building\, CA\, QC\, Montreal\, H3A 0B8\
 , 801 rue Sherbrooke Ouest
SUMMARY:Chemical Society Seminar: Bala Subramaniam - Ad Astra Per Renewable
 s: Systematic Valorization of Lignins
URL:/chemistry/channels/event/chemical-society-seminar
 -bala-subramaniam-ad-astra-renewables-systematic-valorization-lignins-2930
 54
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