澳门金沙4787.com官网 ,报告题目:Lignin conversion in supercritical ethanol 报 告 人:Prof.
Yongdan
Li报告时间:二零一八年十二月二十四日(周4)午夜十:30报告地方:1陆号楼21肆会议室迎接广大师生前往加入!化学与化历史高校2018年四月一6早报告人简要介绍Professor
Yongdan Li, is now the tenured full Professor of Industrial Chemistry in
Aalto University, Finland and also the Changjiang Chair Professor of
Industrial Chemistry of Tianjin University, China. He was the Founder
and Director of the Tianjin Key Laboratory of Applied Catalysis Science
and Engineering at the School of Chemical Engineering and Technology,
Tianjin University, China. After finishing his Ph.D. in Industrial
Catalysis at Tianjin University in 一玖八陆, he went to the University of
Twente in the Netherlands and worked there as a post-doc for a year. He
did a second post-doc at Ecole National Superior of Industrial
Chemistry, Nancy, France. Dr. Li returned to Tianjin University at the
end of 一玖九三 where he was promoted to a Full Professor at the beginning
of 壹玖九肆. He has served as the Chairman of the Department of Catalysis
Science and Technology and the Coordinator of the Industrial Catalysis
Program since 19九七 to 2017. This program was twice ranked as the 一st in
China, in 200一 and 200六. Dr. Li received the most prestigious award
given to Chinese Young Scientists, The NSF Award to Outstanding Young
Scientist in 200四, and obtained the most important title for professors
in China The Changjiang Chair Professorship in 200柒. He serves now also
as the Associate 艾德itor of Catalysis Today and the Associate Editor of
the CIESC Journal.告知简单介绍Seminar: Lignin conversion in supercritical
ethanolProfessor Yongdan Li Chair Professor of Industrial Chemistry,
Department of Chemical and Metallurgical Engineering,School of Chemical
Technology, Aalto University, FinlandAnd Changjiang Chair Professor of
Industrial Catalysis, Tianjin University, ChinaAbstract:Lignin is one
of the major components of lignocellulose biomass, which is
self-produced in a large volume by the biosphere on the Earth, and is
the best renewable resources for the production of aromatic compounds.
This seminar introduces the recent progresses on the catalytic
decomposition of lignin in supercritical alcohols, especially ethanol. A
number of catalysts based on molybdenum will be discussed. Further
analysis of the mechanism reveals that supercritical ethanol without a
catalyst can depolymerize lignin into fragments with a molecular weight
of around 一千 and the catalyst further converts the intermediate sized
molecules into small molecules suitable for fuels and chemicals.附属类小部件:无

报告人:Gary L. Haller

报告标题一:Solid-state depolymerization to produce uncondensed lignin
for valorization 报 告 人:Prof. Xuejun Pan (University of
Wisconsin-Madison)报告时间:二零一八年5月26日(周1)早上玖:00告知地方:逸夫工程馆10五楼会议室报告题目贰:Isomerization
of glucose to fructose catalyzed by a weak 刘易斯 base in water报 告
人:Prof. Xuejun Pan (University of
Wisconsin-Madison)报告时间:二〇一八年11月4日(星期一)早上玖:00告知地方:逸夫工程馆拾伍楼会议室迎接广大师生前往!化学与化管理大学二〇一八年3月十八日Solid-state
depolymerization to produce uncondensed lignin for valorizationXuejun
Pan, PhDProfessorBiological Systems Engineering, University of
Wisconsin-MadisonAbstract:This study demonstrated that lignin could be
efficiently depolymerized in the solid state with minimal condensation
and separated from biomass with high purity by dissolving and
hydrolyzing cellulose and hemicelluloses, using an acidic lithium
bromide trihydrate (ALBTH) system under mild conditions (with 40 mMHCl
at 1十 °C). The benzodioxane structure was identified and confirmed for
the first time in an acid-depolymerized lignin. Reactions using lignin
model compounds confirmed the formation of the uncondensed moieties and
revealed the synergy between LiBr and acid in inducing the crucial
intermediate α-benzyl carbocations, which then led to cleavage of the
β–O–4-aryl ether bonds to produce Hibberts ketones, demethylation to
produce benzodioxanes, and condensation reactions. Unlike in the LMC
reactions, the condensation of the real lignin in biomass under ALBTH
conditions was greatly diminished, possibly due to lignins remaining in
the solid state, limiting its mobility and accessibility of the a-benzyl
carbocation to the electron-rich aromatic sites for condensation.
Preliminary results indicated that, because of its uncondensed nature,
the ALBTH lignin was a good lignin feedstock for hydrogenolysis. This
study provided a new approach to effectively isolate depolymerized
lignin from lignocellulose in a less condensed form for boosting its
downstream valorization. Isomerization of glucose to fructose catalyzed
by a weak Lewis base in waterXuejun Pan, PhDProfessorBiological Systems
Engineering, University of Wisconsin-MadisonAbstract:This study
demonstrated that glucose could be isomerized to fructose in the
concentrated aqueous solution of lithium bromide (LiBr) alone without
any additional catalyst under mild conditions. The isomerization
mechanisms were studied via isotopic labeling experiments. It was
verified for the first time that not only the cation (Li+) but also the
anion (Br‾, a weak Lewis base) in the system catalyzed the isomerization
of glucose to fructose. The Br‾ catalyzed the isomerization through the
proton transfer mechanism via enediol intermediate, while the Li+ did
through the intramolecular hydride shift mechanism from C2 to C1. The
estimation using quantitative 13C-NMR analysis indicated that Br‾
catalyzed approximately 85% of the isomerization, while Li+ was
responsible for the rest 15%. It was found that 31% of fructose was
produced from glucose under the optimum reaction conditions (120 °C for
15 min in LiBrtrihydrate). The outcomes of this study provided not only
better understanding and insights of the sugar transformations to
fructose and subsequently to furan-based platform chemicals in
LiBrtrihydrate but also an alternative approach to produce fructose from
glucose.Biography:Dr. Pan is a Professor in the Department of
Biological Systems Engineering at University of Wisconsin-Madison. He
earned his Bachelor, Master and PhD degrees in Chemical Engineering at
Tianjin University of Science and Technology, China, and a PhD degree in
Applied Bioscience at Hokkaido University, Japan. Dr. Pan conducted
postdoctoral researches at Georgia Tech, University of Minnesota, and
University of British Columbia, successively.Dr. Pans areas of interest
include (1) pretreatment and fractionation of lignocellulosic biomass;
(2) enzymatic and chemical saccharification of lignocellulose; (3)
chemical and biological conversion of lignocellulose to chemicals and
liquid fuels; (4) high-value utilization of cellulose, hemicellulose and
lignin; and (5) fundamental understanding of physical and chemical
changes of plant cell wall during biorefining.Dr. Pan has published 90+
peer reviewed journal articles, 6 book chapters, and 3 US patents. Total
citation >6500, h-index 37, and i10-index 64. He was elected as
Fellow of International Academy of Wood Science in 2013 and won Alfred
Toepfer Faculty Fellow Award in 2011 and NSF Career Award in
2009.附件:无

【澳门金沙4787.com官网】学术预先报告,Li教授学术报告会的通报。告知题目:From Surface-Bound Organic Chemistry to 罗曼tic
Materials(从表面界有机化学到罗曼蒂克材质)

Department of Chemical & Environmental Engineering, Yale University,
USA澳门金沙4787.com官网 1

报 告 人:Prof. Han Zuilhof (the Chair of Organic Chemistry at
Wageningen University)

报告时间:二零一八年 七月0九 日午后三:30-伍:00。

时间:2017 年 10月13日9:30-11:00

告诉地点:化行楼 2②陆 报告厅

地点:16号楼214室

特邀单位:生物医药作用材质国家地点联合工程基本、协同立异核心、节省工时程才具商讨中央、省重大实验室、化学与素材科学大学

迎接广大师生插足!

报告人简要介绍:

化学与化理高校

Gary L. Haller is Henry Prentiss Becton Emeritus Professor of
Engineering and Applied Science. He received his PhD in Physical
Chemistry in 1966 from Northwestern University and after a post-doctoral
year at Oxford University, was a member of the Yale faculty since 1967.
At Yale, he served as Departmental Chair, Chair of the Council of
Engineering, Deputy Provost for Engineering and Physical Sciences, and
Master of the Jonathan Edwards College. He is currently Director of the
Henry Koerner Center for Emeritus Faculty at Yale. Professor Haller has
held several visiting positions including Oxford University, Universite
Catholique de Louvain, Belgium, Universidad del Sur, Argentina (United
Nations consultant), University of Edinburgh, Technical University of
Münich , New York University, and the National Bureau of Standards (now
National Institute of Standards and Technology). He was co-editor (now
senior editor for Perspectives and Mini-reviews) of the Journal of
Catalysis and a member of several editorial boards, including that of
the Yale Alumni Magazine. He has been an active industrial consultant
for more than 15 companies and is author or co-author of more than 250
publications, one book and eight industrial patents.

2017年10月11日

内容摘要:

Covalently bound, ultrathin (<100 nm) layers on surfaces can be used
to finetune surface properties in detail. In the presentation I will
first zoom in on two facets: the increased potential of analytical
chemistry to follow what is going on at surfaces (Angew Chem 2017), and
novel chemistries that are still being developed to easily modify
surfaces of interest (also Angew Chem 2017). In the second part I will
zoom out to more composite materials that combine combine bio-specific
interactions with self-healing characteristics, the further development
of which requires the combination of exquisite materials science and
chemistry.

报告人简单介绍:

Han Zuilhof is the Chair of Organic Chemistry at Wageningen University.
His interests focus on surface-bound (bio-)organic chemistry and
bio-nanotechnology. He obtained both an MSc in Chemistry (organic
chemistry) and an MA in Philosophy (logic and theory of knowledge); both
with highest honors. After obtaining a Ph.D. in Chemistry (Leiden
University, 1994; highest honors), he did postdoctoral work at the
University of Rochester, NY (with Joe Dinnocenzo & Sason Shaik) and at
Columbia University (with Nick Turro). Subsequently he joined the
faculty at Wageningen University in 1997, moved through the ranks, and
has been a Professor of Organic Chemistry since 2007. He is the author
of > 250 peer-reviewed papers, including 5 reviews, and written 8
patents, of which 5 were sold to companies. He is also a Distinguished
Adjunct Professor of Chemical Engineering at the King Abdulaziz
University in Jeddah, Saudi Arabia, a Distinguished Perennial Guest
Professor of Medicinal Chemistry, Tianjin University, Tianjin, China, is
the founder of a spin-off company Surfix, serves on the Editorial
Advisory Board of Langmuir, Applied Surface Science and Advanced
Materials Interfaces, and was the 2013-2014 Joseph Meyerhoff Visiting
Professor of Chemistry at the Weizmann Institute of Science.

As organic chemist at Wageningen University he is predominantly looking
for novel concepts to link biological activity of interest via the
tricks of the trade of organic chemistry to surfaces. This
interdisciplinary science is really cool. Many processes of interest
(conversions, molecular capture, catalysis) occur at a surface, yet
relatively little organic chemistry is focussed on surfaces. This
provides significant chances and challenges for organic chemistry and
organic materials.

附件:无

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