告诉标题:Tailoring Lignin Properties for Lignin First Biorefinery using
Low Temperature (≤90 °C) Hydrotrope Chemistry(在
木质素优先的生物精炼中用低温(≤90℃)助溶化学法调整泛酸的性 质) 报 告
人:Prof. J.Y. ZhuUSDA Forest Service, Forest Products Laboratory,
Madison, WI, USADept. of Biological Systems Engineering,University of
Wisconsin-Madison报告时间:二零一八年十月10日(星期三)深夜一伍:00报告地方:逸夫工程馆4楼会议室应接广大师生插手!化学与化历史大学二零一八年6月二二十十九日报告人简介:Dr.
J.Y. Zhu is a scientific leader at the USDA Forest Products Laboratory,
Madison, Wisconsin. Currently, he holds an adjunct appointment at the
University of Wisconsin-Madison. He was the inaugural Fulbright-Aalto
University Distinguished Chair in Energy and Sustainable Use of Natural
Resources (20一伍-201陆), Helsinki, Finland. He has co-authored over 200
peer referred papers and over a dozen of US patents. His work is
frequently cited by the broad scientific community with google scholar
citations over 8800 and an h index of 50.His scientific accomplishments
were honored with US Forest Service Lacrosse&D Distinguished Science Award in
201叁, TAPPI (Technical Association of Pulp and Paper Industry)
International Lacrosse&D Technical Award and 威尔iam H. Aiken Prize in 201四,
and AIChE (American Institute of Chemical Engineers) 安德鲁 Chase award
in 2016. Dr. Zhu is a Fellow of AIChE, TAPPI, and IAWS (International
Academy of 伍德 Science).报告摘要:In this presentation, I will outline
our past research work in the productions of biojet fuel and cellulose
nanomaterials. I will also report our recent discovery of the
hydrotropic properties of a recyclable aromatic acid, p-toluenesulfonic
acid (p-TsOH) for potential low-cost and efficient fractionation of
lignocelluloses. Specifically, I will focus on tailoring lignin
properties for lignin first biorefinery using this low temperature (≤90
°C) hydrotrope chemistry. p-TsOH fractionated wood into two fractions:
(i) a primarily cellulose rich water-insoluble solid fraction that can
be used for the production of high-value building blocks, such as
lignocellulosic nanomaterials, dissolving pulp fibers; and (ii) a spent
acid liquor stream containing mainly dissolved lignin that can be easily
precipitated as lignin nanoparticles by diluting the spent acid liquor
using water to below the minimal hydrotrope concentration.
Hemicelluloses in the spent liquor were mainly in the form of xylose
that can be dehydrated into furfural using the p-TsOH in the spent
liquor after lignin precipitation without additional catalysts. By
adjusting the fractionation severity, we were able to produce lignin
with unique optical properties, suitable for cosmetic, and dispersant
for dyes. We were also able to obtain lignin with desired chemical
structure and molecular weight distributions, for example, producing
lignin with similar properties as mill wood lignin containing high β-O-四linkages and large molecular weight.p-TsOH has a relatively low water
solubility, which can facilitate efficient recovery using commercially
proven crystallization technology by cooling the concentrated spent acid
solution to ambient temperatures to achieve environmental sustainability
through recycling of p-TsOH.附属类小部件:无

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7月三十日(周1)深夜九:00告知地方:逸夫工程馆105楼会议室报告标题二:Isomerization
of glucose to fructose catalyzed by a weak Lewis base in water报 告
人:Prof. Xuejun Pan (University of
Wisconsin-Madison)报告时间:2018年四月十五日(周四)深夜玖:00告知地方:逸夫工程馆拾5楼会议室接待广大师生前往!化学与化法高校2018年10月112日Solid-state
depolymerization to produce uncondensed lignin for valorizationXuejun
Pan, PhDProfessorBiological Systems Engineering, University of
Wisconsin-麦迪逊Abstract: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

【美高梅集团网站】至于设立美利坚联邦合众国农业分部林产品实验室朱俊勇助教学术报告会的通报,关于设立国外名师。报告标题:Commodity Chemicals from Biomass: Catalytic Conversion of
Biomass into α,ω-diols 报 告 人:Prof. 吉优rge W.
Huber报告时间:二零一八年四月二13日(周二)一伍:00-1六:00:报告地点:制浆造纸国家重要实验室新楼(轻工业科学与工程大学D楼)30⑥会议室迎接广大师生踊跃参预!轻工科学与工程高校二零一八年七月二十13日报告摘录:This
presentation is about a multi-step catalytic approach for conversion of
cellulose into 一,六-hexanediol and hemicellulose into 1,5 pentanediol as
well as other oxygenated commodity chemicals. These α,ω-diols are
high-volume (130,000 tons/year), high value ($四,600/ton) commodity
chemicals used in the polymer industry. Cellulose is first converted
levoglucosan which is then dehydrated into levoglucosenone (LGO) in the
condensed phase with dilute acid (5-20 mM acid concentration) using a
polar, aprotic solvent. The product selectivity and catalyst activity is
a function of the water concentration, the solvent type and the
cellulose loading. The activity of the acid catalyst is a function of
the thermodynamics of the solvent system as will be presented using a
molecular dynamics model. The LGO is then hydrogenated into
dihydrolevoglucosenone, levoglucosanol, and tetrahydropyran-2-methanol
(THPM). The THPM then undergoes selective C-O-C hydrogenolysis to
produce 壹,六-hexanediol using a bifunctional (Pt-WOx/TiO二) catalyst with
> 十分九 selectivity to 壹,六 hexanediol. Tetrol and 一,二,陆 hexanetriol can
also be selectively produced with this system. The functionality of
these molecules can be exploited to produce a range of high performance
material. The hemicellulose is converted into furfural which then
undergoes a four step process to produce 1,5 pentanediol. In the first
step furfural is hydrogenated into tetrahydrofurfuryl alcohol (THFA).
The THFA is then dehydrated into dihydropyran (DHP) and water. The last
two steps involves hydration of the DHP and then hydrogenation of this
hydrated species. We will outline the catalytic chemistry that happens
in each of these steps and the catalytic challenges for production of
new biomass based commodity chemicals.报告人简单介绍:吉优rge W. Huber is a
Professor of Chemical and Biological Engineering at University of
Wisconsin-麦迪逊. His research focus is on Breaking the Chemical and
Engineering Barriers to Lignocellulosic Biofuels. 吉优rge is currently
working with governmental and industrial institutions to help make
cellulosic biofuels a reality. He is the co-founder of Anellotech a
biofuel company focused on commercializing catalytic fast pyrolysis a
new technology developed by the Huber research group to convert biomass
into 瓦斯oline range aromatics. 吉优rge’s discovery of Raney-NiSn catalyst
for hydrogen production from biomass-derived oxygenates was named as one
of top 50 technology breakthroughs of 200三 by Scientific America. 吉优rge
has spoken at two US congressional briefings to discuss the vital role
of Chemical Engineering and heterogeneous catalysis in helping to solve
our nation’s energy challenges. He has authored more than 160
peer-reviewed publications including three publications in Science,
which have received more than 27,000 citations and total citations in
20一7 was 四,017. 1玖 published patents and patent applications related to
catalysis and biomass. 吉优rge serves on the editorial board of Energy
and Environmental Science and ChemCatChem. He is also on the scientific
advisory board of the National Advanced Biofuels Consortium and
CatchBio.附件:无

广大师生:为了活跃高校学术空气,鼓励和支撑高校教师职员和工人约请国内外知名专家实行遍布的学术沟通活动,现开始展览含笑花开新资料讲坛(第六期)活动。此番论坛的具体安排如下:1、论坛时间二〇一八年11月贰二二十五日清晨九:00二、地方华工5山校区八号楼201会议室3、论坛议程

时间

事项或议程

9:00-9:15

开幕式

主持人:任力

大学监护人迎接致辞

9:15-10:00

大方学术报告

题目:REE Critical Materials Recovery by Advanced Magnetic Separation
Nanotechnology

报告人:Professor You Qiang,University of Idaho

10:00-10:20

告知交换时间

10:20-10:30

茶歇

10:30-10:50

资料高校教师学术报告

难点:稀土永磁材质废料回收和再使用

报告人:刘仲武

10:50-11:10

资料高校青年教授学术报告

题目:(Mn,Fe)贰(P,Si)化合物的结商谈磁热效应调节

报告人:郑志刚

11:10-11:30

美高梅集团网站 ,学者与导师及学生互动交换

11:30-11:40

水墨画合影留念

应接广大师生出席!材料科学与工程高校二〇一八年五月2十一日告知摘要:Rare Earth
Elements (REEs) have unique physicochemical properties that make them
essential elements in many high-tech components, such as electric
vehicle, power generator, MBMWX5I, screen display, hydride batteries and
energy storage. Traditional separation methods like centrifugation and
filtration are usually labor-consumptive, uneconomical and environmental
pollutant. Magnetic separation nanotechnology developed in our lab is an
upcoming technique for REE recycling. Magnetic nanosorbents exhibit
special superiority due to convenient separation by an external magnetic
田野同志.Advantages of magnetic nanosorbents are low inventory utilization
of nanosorbents, enhanced sorption efficiency, high selectivity, and low
production of secondary waste. This talk presents the study on our
lab-made magnetic nanosorbents – double coated magnetic nanoparticles
(dMNP) conjugated with diethylene triamine pentaacetic acid (DTPA) and
their potential to be used as effective sorbents to recycle trivalent
lanthanides from aqueous solutions. The REE sorption results show that
the magnetic nanosorbents possess a high stability, fast kinetics, and
high sorption efficiency in harsh environments. The metal sorption on
the nanosorbents is reversible so that the metal-loaded dMNP-DTPA can be
effectively regenerated by the dilute acids. The nanosorbents can be
reused for more than 1伍 sorption/desorption cycles, which helps to
offset the synthesis cost and makes this technique cost-effective in REE
recycling. 专家简历:Dr. Qiang is a professor of Physics and
Environmental Science Program at the University of Idaho, US. He is the
director of UI Nanophysics and Nanomaterial Research Lab. He is a
Fellow,the Trustee and Chairman of Idaho Academy of Science and
Engineering.He received his MS degree 1983 at the Harbin Institute of
Technology and Chinese Academy of Space Technology, and Ph.D. degree in
19九7 at the University of Freiburg, 德文y. Dr. Qiangs research focuses
on nanomagnetism and magnetic nanomaterials. He has studied magnetic
nanoparticles and nanocomposites for more than 30 years. His expertise
includes: synthesis of monodispersive nanoclusters and
nanocluster-assembled composites; characterization of magnetic and
optical properties as well as transport properties by conductivity,
optics, susceptibility and theoretical investigation. He applies
magnetic nanomaterials in energy, environmental and biomedical science
and nanotechnology.Presently Dr. Qiangs research interests are a)
Nano-nuclear technology and magnetic separation nanotechnology for used
nuclear fuel recycling; b) High temperature ferromagnetism and giant
magnetoresistance of semiconductor oxide nanomaterials; and c)
Iron-based magnetic nanoparticles for cancer treatment and environmental
remediation. He has published more than 1十-refereed papers and 4 book
chapters, more than 130 invited talks at US and international
conferences, universities and institutions. He serves as editors for
scientific journals like IEEE Mag. Letters, Nanomaterials… and served on
national and international conference organizations and committees,
including APS, M途锐S, CleanTech, NanoTech and IMC. He has organized and
chaired many conferences and sessions such as INTE凯雷德MAG, MMM, TMS, APS
and NW-APS meetings.附属类小部件:无

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