检索结果-南通市图书馆

High-yield production of porous carbon spheres derived from enzymatic hydrolysis lignin for zinc ion hybrid capacitors

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2024年第2期18卷 127-136页

作者： Tao Huang Xihong Zu jianhui Ma Wenbin jian Xueqing Qiu Wenli {2. Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China school of Advanced Manufacturing Guangdong University of TechnologyJieyang 522000China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

The widespread implementation of supercapacitors is hindered by the limited energy density and the pricey porous carbon electrode *** cost of porous carbon is a significant factor in the overall cost of supercapacitors,therefore a high carbon yield could effectively mitigate the production cost of porous *** study proposes a method to produce porous carbon spheres through a spray drying technique combined with a carbonization process,utilizing renewable enzymatic hydrolysis lignin as the carbon source and KOH as the activation *** purpose of this study is to examine the relationship between the quantity of activation agent and the development of morphology,pore structure,and specific surface area of the obtained porous carbon *** demonstrate that this approach significantly enhances the carbon yield of porous carbon,achieving a yield of 2.%in contrast to the conventional carbonization-activation method(9%).The samples acquired through this method were found to contain a substantial amount of mesopores,with an average pore size of 1.59 to 1.85 nm and a mesopore ratio of 2..6%.Additionally,these samples showed high specific surface areas,ranging from 1051 to 1831 m2.g^(−1).Zinc ion hybrid capacitors with lignin-derived porous carbon cathode exhibited a high capacitance of 2.9 F·g^(−1) at 0.1 A·g^(−1) and an energy density of 99.1 Wh·kg^(−1) when the power density was 80 kW·kg^(−1).This research presents a novel approach for producing porous carbons with high yield through the utilization of a spray drying approach.

关键词： enzymatic hydrolysis lignin porous carbon spheres spray drying zinc ion hybrid capacitors

Accelerating Factor Xa inhibitor discovery with a de novo drug design pipeline

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第8期72卷 85-94页

作者： Yujing Zhao Qilei Liu jian Du Qingwei Meng Liang Sun Lei zhang State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart Materials Oriented Chemical EngineeringInstitute of Chemical Process Systems EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China Ningbo Institute of Dalian university of technology Ningbo 315016China Shenzhen Shuli Tech Co. LtdShenzhen 518126China Department of Physics City University of Hong KongTat Chee AvenueKowloonHong Kong SARChina

Small-molecule drugs are essential for maintaining human health. The objective of this study is to identify a molecule that can inhibit the Factor Xa protein and be easily procured. An optimization-based de novo drug design framework, Drug CAMD, that integrates a deep learning model with a mixed-integer nonlinear programming model is used for designing drug candidates. Within this framework, a virtual chemical library is specifically tailored to inhibit Factor Xa. To further filter and narrow down the lead compounds from the designed compounds, comprehensive approaches involving molecular docking,binding pose metadynamics(BPMD), binding free energy calculations, and enzyme activity inhibition analysis are utilized. To maximize efficiency in terms of time and resources, molecules for in vitro activity testing are initially selected from commercially available portions of customized virtual chemical libraries. In vitro studies assessing inhibitor activities have confirmed that the compound EN300-331859shows potential Factor Xa inhibition, with an IC_(50)value of 34.57 μmol·L^(-1). Through in silico molecular docking and BPMD, the most plausible binding pose for the EN300-331859-Factor Xa complex are identified. The estimated binding free energy values correlate well with the results obtained from biological assays. Consequently, EN300-331859 is identified as a novel and effective sub-micromolar inhibitor of Factor Xa.

关键词： Chemical product design Mathematical programming method Deep learning Binding affinity Factor Xa inhibitor

Health Risk Assessment of Employees Exposed to Chlorination By-products of Recreational Water in Large Amusement Parks in Shanghai

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2024年第8期37卷 865-875页

作者： Weizhao Cao Yiming Zheng Wenxuan Zhao Lisha Shi Yunhui zhang Lijun zhang {2. Chen Key Lab of Health technology Assessment National Health Commission of the People’s Republic of China(Fudan University)Shanghai 200032China Key Laboratory of Public Health Safety Ministry of EducationSchool of Public HealthFudan UniversityShanghai 200032China Division of Public Health Service and Safety Assessment Shanghai Municipal Center for Disease Control and PreventionShanghai 200336China Shanghai Institute of Preventive Medicine Shanghai 200336China

Objective Chlorination is often used to disinfect recreational water in large amusement parks;however,the health hazards of chlorination disinfection by-products(DBPs)to occupational populations are *** study aimed to assess the exposure status of chlorinated DBPs in recreational water and the health risks to employees of large amusement *** Exposure parameters of employees of three large amusement parks in Shanghai were investigated using a *** typical chlorinated DBPs in recreational water and spray samples were quantified by gas chromatography,and the health risks to amusement park employees exposed to chlorinated DBPs were evaluated according to the WHO's risk assessment *** Trichloroacetic acid,dibromochloromethane,bromodichloromethane,and dichloroacetic acid were detected predominantly in recreational *** carcinogenic and non-carcinogenic risks of the five DBPs did not exceed the risk *** addition,the carcinogenic and non-carcinogenic risks of mixed exposure to DBPs were within the acceptable risk *** Typical DBPs were widely detected in recreational water collected from three large amusement parks in Shanghai;however,the health risks of DBPs and their mixtures were within acceptable limits.

关键词： Risk assessment Water Environmental health Occupational exposure Chlorinated disinfection by-product

Inclusions modification by rare earth in steel and the resulting properties: A review

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第3期42卷 431-445,I0001页

作者： Xiaoqiang Wang Zhiwei Wu Bing Li Wenxiong Chen Jun zhang jian Mao College of Materials Science and Engineering Sichuan UniversityChengdu610065China Chengdu Advanced Metal Materials Industry technology Research Institute Co. Ltd.Chengdu610303China State Key Laboratory of Metal Material for Marine Equipment and Application Anshan114009China

Rare earth(RE) elements are excellent modifiers for non-metallic inclusions that inevitably appear in steel and affect steel properties. This paper reviews the research status of inclusions modification by RE elements and the changes it cause on steel properties. First, the inclusion changes caused by RE modification are described. Generally, after adding pure RE, the main evolution of inclusions occurs as M →M + RE-Al-O → RE-Al-O + RE_(2.O_(2.S → RE_(2.O_(2.S + RE—S/RE_(2.O_(2.S + RE-O with an increase in the RE content(M represents the inclusions before RE addition). The type of final inclusion obtained after RE modification is related to the relative contents of S and O in the steel. Moreover, fine, regular, and uniformly distributed inclusions can be obtained with appropriate RE addition. However, the effectiveness of inclusions modification by adding both RE and non-RE elements is closely related to the order of their addition. Second, the applications and advantages of thermodynamic calculations in the study of RE-modified inclusions are introduced. Third, the changes in the corrosion resistance, impact properties,and other properties of steel caused by the modification of inclusions by RE are reviewed. Finally, the perspectives and trends of inclusions modified by RE elements in the steel industry are presented.

关键词： Rare earths Inclusions Modification Thermodynamic calculation Properties change

Influence of rare earth promoters on the performance of Ni/Mg(Al)O catalysts for hydrogenation and steam reforming of toluene

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2009年第6期28卷 582-589页

作者： zhang Yuwen CHENG Hongwei LU Xionggang DING Weizhong ZHOU Guozhi Shanghai Key Laboratory of Modem metallurgy and Materials Processing School of Materials Science and Engineering Shanghai University Shanghai 200072 China school of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

CeO2., La2.3-, and ZrO2.promoted Ni/Mg（Al）O catalysts synthesized by hydrotalcite-type precursors have been investigated with respect to catalytic activity and carbon formation in the hydrogenation and steam reforming of toluene as a model tar compound. X-ray diffraction （XRD）, Brunauer-Emmett-Teller （BET） specific surface area and Hz-temperature programmed reduction （TPR） were used to observe the characteristics of the prepared catalysts. The carbon formation and its amount on the used catalysts were examined by transmission electron microscope （TEM）, scanning electron microscope （SEM） and thermogravimetric （TG）. The trend of catalytic activity as derived from the experimental results followed the order： Ni-Ce〉Ni-La〉Ni-Zr〉Ni. The catalyst modified with CeO2.exhibited the highest catalytic performance and had good carbon resistance in the hydrogenation and steam reforming of toluene. A toluene conversion of 96.8%, a CH4 yield of 45.2. and a CO yield of 50.4% have been achieved. The addition of promoters led to better dispersion of nickel species and higher interaction nickel-support, which were favorable for increasing the catalytic activity and effectively preventing carbon formation.

关键词： hydrogen production hydrogenation rare earth hydrotalcite

Optimum Slag Basicity for Deoxidation DuringSecondary Refining Process

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,metallurgy and Materials 1997年第1期11卷 4-7页

作者： CHENG Guoguang zhang jian(Department of {2., USTB, beijing 100083, china)

According to the coexistence theory of slag structures, the calculating model of the oxidizing capabilityfor CaO-MgO-FeO-Al2.3-SiO2.refining slag system has been deduced. Based on this model, the concept and thecalculating method of the optimum slag basicity are put forward. The results have proved that at this basicity,steel with lower oxygen content can be obtained and non-metallic indigenous globular inclusions can be avoidedmore effectively than at other basicity.

关键词： slag deoxidation relining basicity

Simulation of Thermodynamics and Kinetics for KR Desulphurization

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S2期18卷 98-106页

作者： XU An-jun1, zhang Mao-lin2. zhang Hui-ning1, LI An-dong3 (1. {2. of Metallurgical and Ecological Engineering, university of Science and technology beijing, beijing 100083,china 2. Steel-Making and Continuous Casting Engineering Institute, Capital Engineering and Research Incorporation Limited, beijing 100176,china 3. Stainless Steel Company, Baosteel Group, Shanghai 2.1900,china) Univ Sci & Technol beijing Sch Met & Ecol Engn Beijing 100083 Peoples R China Capital Engn & Res Inc Ltd Steel Making & Continuous Casting Engn Inst Beijing 100176 Peoples R China Stainless Steel Co Baosteel Grp Shanghai 201900 Peoples R China

This paper seeks to optimize parameters, reduce the cost of desulphurization and the consumption of operation about KR pretreatment of hot metal at the Stainless Steel Company, Baosteel Group. Based on the theoretical analysis of physical chemistry in metallurgy, simulation experiments of the KR desulphurization of hot metal were conducted in a laboratory and the composition of the desulphurization was optimized, by means of chemical analysis, DSC, SEM and EDS. The water modeling displays the fluid flow characteristics of KR desulphurization. Combination of the techniques and production at the Stainless Steel Company, Baosteel Group, the optimized parameters of the process are put forward.

关键词： desulphurization of hot metal KR, desulphurization thermodynamics water model

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2024年第7期13卷 1011-1022页

作者： Zheng Liang Han zhang Yichuan Li Wenkang zhang {2. Zhou Qilin Gu Zhaoxiang Zhong Weihong Xing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneNanjing Tech UniversityNanjing 211816China Nanjing Membrane Application Institute Co. Ltd.Nanjing 210009China

Porous ceramics usually require high mechanical strength and maximized porosity simultaneously,while for conventional particle grading strategies,it is highly challenging to meet both *** this end,a reverse particle grading strategy was developed based on the linear packing model by unusually introducing coarse particles(d_(50)=16μm)into a fine particle(d50=5μm)*** the extrusion and sintering process,tubular porous SiC ceramic supports with improved mechanical strength were successfully *** effects of coarse particles on the rheological properties of the ceramic paste and the macroscopic properties and microstructure of the SiC supports were systematically *** an increase in the content of coarse SiC particles to 30 wt%,the pressure generated during extrusion decreased from 5.5±0.2.to 1.3±0.1 ***,the bending strength of the tubular supports increased from 36.6±5.6 to 49.1±4.5 MPa when 2. wt%coarse powder was *** notably improved mechanical strength was attributed to the distribution of coarse particles that prolonged the route of crack ***,the optimized tubular supports had an average pore size of 1.2.0.1μm,an open porosity of 45.1%±1.6%,and a water permeability of 7163±150 L/(m^(2.·h·bar)as well as good alkali and acid corrosion ***,the strategy was proven to be feasible for the scale-up fabrication of 19-channel SiC tubular porous ceramic supports.

关键词： porous SiC ceramic tubular ceramic support reverse particle grading reaction bonding chemical stability

Red algal evidence for a marine regression during closure of the Paleo-Asian Ocean in the Junggar Basin and its linkage to hydrocarbon generation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china Earth Sciences 2024年第9期67卷 2845-2863页

作者： Ruijie zhang jian CAO Lizeng BIAN Wenxuan HU Liuwen XIA Bin zhang Yong TANG Wenjun HE school of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China Petrochina Xinjiang Oilfield Company Karamay 834000China

The closure of the Paleo-Asian Ocean was a significant geological event in northern Pangea during the *** had a significant effect on climate,biota,and environmental conditions of the Late Paleozoic Ice Age,and resulted in the development of vast energy *** paper reports on the first discovery of marine red algal fossils in the Junggar Basin and its linkage to hydrocarbon *** algae occur mainly in the Fengcheng Formation(ca.300 Ma)and provide direct fossil evidence for closure of the Paleo-Asian *** red algal fossils contain well-preserved reproductive organs,such as cystocarps and *** concentrations of C_(2.) steranes(C_(2.) regular steranes/sum of C_(2.)-C_(2.) regular steranes×100=14.30%-2..30%)and the marine biomarker 2.-n-propylcholesterane(C_(30) diasterane[βα2.S]/sum of C_(2.)-C_(30) diasteranes[βα2.S]×100=1.15%-1.85%)were detected in the red-algae-bearing hydrocarbon source *** experiments that simulate hydrocarbon generation show that the oil generation potential of the red-algae-bearing source rocks is 363.71 mg g^(-1) total organic *** result,combined with oil-source rock correlations,indicates these rocks contributed to the formation of oil and gas resources,particularly in the marginal areas of the *** lake basin inherited the water and biological conditions of the Paleo-Asian Ocean during a marine regression,which was an important factor in the development of these high-quality hydrocarbon source rocks in an alkaline saline *** results advance our understanding of the evolution of the Paleo-Asian Ocean,interactions between the ocean and a lake during the deposition of terrestrial hydrocarbon source rocks,and whether red algae can effectively generate hydrocarbons.

关键词： Biotic precursor 2.-n-propylcholesterane Regressive lake basin Fengcheng Formation Junggar Basin