检索结果-南通市图书馆

聚丙烯腈复合纳米纤维膜的制备及其对金属离子的吸附性能

在线全文

学校读者我要写书评

暂无评论

华东理工大学学报（自然科学版） 2024年第1期50卷 36-45页

作者：赵振杰杨雪红马坤朱志华奚桢浩王杰华东理工大学化工学院化学工程联合国家重点实验室上海200237 中国石化上海石油化工股份有限公司上海200540

以羧基化聚丙烯腈(CPAN)为原料,通过复合改性和接枝改性的方式,制备β-环糊精(β-CD)/CPAN-g-聚乙烯亚胺(PEI)复合纳米纤维膜,为体系引入亲水的β-CD和吸附性能优异的PEI。通过红外光谱仪、X射线衍射仪、万能材料试验机、场发射扫描电... 详细信息

以羧基化聚丙烯腈(CPAN)为原料,通过复合改性和接枝改性的方式,制备β-环糊精(β-CD)/CPAN-g-聚乙烯亚胺(PEI)复合纳米纤维膜,为体系引入亲水的β-CD和吸附性能优异的PEI。通过红外光谱仪、X射线衍射仪、万能材料试验机、场发射扫描电镜等仪器对复合纳米纤维膜进行结构及性能表征,使用等离子体发射光谱仪、X射线光电子能谱仪探究复合纳米纤维膜对Cd^(2+)和Pb^(2+)的吸附性能及吸附机理。结果表明:改性得到的β-CD/CPAN-g-PEI复合纳米纤维膜具有优异的吸附性能,同时保留了纤维膜原有的力学性能,其对Cd^(2+)和Pb^(2+)的最大吸附量分别为176.67 mg/g和240.83 mg/g,吸附过程符合拟二级动力学模型和Langmuir等温吸附模型,且循环使用5次后仍保持80%以上的吸附性能。

关键词：聚丙烯腈环糊精静电纺丝吸附金属离子

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

甲基氯硅烷精馏流程的模拟与优化

过程工程学报 2020年第1期20卷 52-58页

作者：曾雄伟彭金鑫奚桢浩赵玲袁渭康聂长虹赵晓辉华东理工大学化学工程联合国家重点实验室上海200237 合盛硅业股份有限公司浙江嘉兴314201 华东理工大学过程系统工程教育部工程研究中心上海200237

采用Aspen plus软件对工业七塔精馏过程进行全流程建模与模拟,优化工艺参数,研究了新的精馏节能工艺。对一甲塔等7个精馏塔采用双因素水平的灵敏度分析,考察了塔釜采出率、回流比、进料位置和塔顶压力对产品浓度和热负荷的影响,确定一... 详细信息

采用Aspen plus软件对工业七塔精馏过程进行全流程建模与模拟,优化工艺参数,研究了新的精馏节能工艺。对一甲塔等7个精馏塔采用双因素水平的灵敏度分析,考察了塔釜采出率、回流比、进料位置和塔顶压力对产品浓度和热负荷的影响,确定一甲塔最优的工艺参数:塔釜摩尔采出率为0.92,摩尔回流比为130,塔顶压力为0.18MPa,总理论板数为400,在210块理论板位置进料。在此基础上,针对高能耗的脱高塔/脱低塔,模拟研究了双效精馏新工艺,新工艺可节省39.70%的年总成本;针对一甲塔模拟研究了热泵精馏新工艺,新工艺可降低41.42%的年总成本。

关键词：甲基氯硅烷 Aspen plus 双效精馏热泵精馏年总成本

Phosphotungstic acid immobilized on amino-functionalized TS-1 zeolite as a solid acid catalyst for the synthesis of tributyl citrate

在线全文

学校读者我要写书评

暂无评论

Multiblock poly（ether-b-amide） copolymers comprised of PA1212 and PPO-PEO-PPO with specific moisture-responsive and antistatic properties

中国化学工程学报（英文版） 2024年第6期 199页

作者： Pei Li Bianfang Shi Junyao Shen Ran Cui Wenze Guo Ling Zhao zhenhao xi

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Highly interconnected macroporous MBG/PLGA scaffolds with enhanced mechanical and biological properties via green foaming strategy

Chinese Journal of Chemical Engineering 2023年第1期

作者： Jie Jiang Wei Cheng Qiuyu Tang Xun Pan Jinjin Li Ling Zhao zhenhao xi Weikang Yuan

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2021年第1期

作者： Chaobo Song Jiapeng Zhang Shuang Li Shengbin Yang Eryi Lu zhenhao xi Lian Cen Ling Zhao Weikang Yuan

来源：评论

学校读者我要写书评

暂无评论

钛酸四丁酯催化合成柠檬酸三辛酯的工艺研究

塑料助剂 2017年第5期 24-27页

作者：冯保林刘延华邢光全陈利贞奚桢浩山东蓝帆化工股份有限公司淄博255411 华东理工大学化工学院上海200237

以柠檬酸和异辛醇为原料,钛酸四丁酯为催化剂,合成了柠檬酸三辛酯,考察了催化剂用量、异辛醇与柠檬酸物质的量比、反应温度、反应时间等对柠檬酸转化率的影响,用正交实验设计法筛选出最佳的酯化工艺条件:催化剂用量为柠檬酸质量的1.4%,n... 详细信息

以柠檬酸和异辛醇为原料,钛酸四丁酯为催化剂,合成了柠檬酸三辛酯,考察了催化剂用量、异辛醇与柠檬酸物质的量比、反应温度、反应时间等对柠檬酸转化率的影响,用正交实验设计法筛选出最佳的酯化工艺条件:催化剂用量为柠檬酸质量的1.4%,n(异辛醇):n(柠檬酸)为4.5:1,反应温度150℃反应时间4 h,样品经红外色谱定性分析,经气相色谱分析纯度大于99.5%。

关键词：柠檬酸三辛酯钛酸四丁酯催化酯化异辛醇柠檬酸

Transactive Energy Trading in Reconfigurable Multi-carrier Energy Systems

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 67-76页

作者： Yifei Wang Zhiheng Huang zhenhao Li xi Wu Loi Lei Lai Fangyuan Xu School of Automation Guangdong University of TechnologyGuangzhouChina School of Electrical Engineering Southeast UniversityNanjingChina

The penetration of multi-carrier energy systems in distribution system gains more and more *** this paper,a bi-level transactive energy trading framework is proposed to improve the energy scheduling and operation efficiency for multi-carrier energy systems which are modeled as energy hubs(EHs).In the upper level,each EH in the distribution system not only makes energy scheduling decisions considering supplies and demands of local energy,but also trades energy with each other to further maximize their social *** associated trading payment among EHs is made in a fair manner by applying Nash bargaining *** solve the bargaining problem by decomposing it into two subproblems:operation cost minimization problem and payment bargaining ***,based on the trading decision,the nodal equivalent loads of EHs are sent to the distribution system operator(DSO)without publishing trading *** applying the second-order cone programming(SOCP),DSO reconfigures the network to reduce the transmission loss of the system in the lower *** network reconfiguration and the trading behavior of EHs interact and iterate until the *** studies on modified IEEE 33-bus distribution system demonstrate the effectiveness of the proposed framework.

关键词： Multi-carrier energy system energy hub(EH) transactive energy distribution reconfiguration Nash bargaining

Source Contributions to PM2.5 under Unfavorable Weather Conditions in Guangzhou City,China

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2018年第9期35卷 1145-1159页

作者： Nan WANG zhenhao LING Xuejiao DENG Tao DENG xiaopu LYU Tingyuan LI xiaorong GAO xi CHEN Institute of Tropical and Marine Meteorology China Meteorological AdministrationGuangzhou 510000China School of Atmospheric Sciences Sun Yat-sen UniversityGuangzhou 510000China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversiiyHong Kong 999077China Ecological Meteorology Centez Guangdong Provincial Meteorological Bureau Guangzhou 510000China Guangzhou Meteorological Observatory Guangzhou 510000China School of Environmental Science and Engineering Sun Yat-sen UniversiiyGuangzhou 510000China

Historical haze episodes（2013–16） in Guangzhou were examined and classified according to synoptic weather *** types of weather systems were found to be unfavorable, among which ＂foreside of a cold front＂（FC） and ＂sea high pressure＂（SP） were the most frequent（〉 75% of the total）. Targeted case studies were conducted based on an FC-affected event and an SP-affected event with the aim of understanding the characteristics of the contributions of source regions to fine particulate matter（PM（2.5）） in Guangzhou. Four kinds of contributions—namely, emissions outside Guangdong Province（super-region）, emissions from the Pearl River Delta region（PRD region）, emissions from Guangzhou–Foshan–Shenzhen（GFS region）, and emissions from Guangzhou（local）—were investigated using the Weather Research and Forecasting–Community Multiscale Air Quality model. The results showed that the source region contribution differed with different weather systems. SP was a stagnant weather condition, and the source region contribution ratio showed that the local region was a major contributor（37%）, while the PRD region, GFS region and the super-region only contributed 8%, 2.8% and 7%, respectively, to PM（2.5） concentrations. By contrast, FC favored regional transport. The super-region became noticeable,contributing 34.8%, while the local region decreased to 12%. A simple method was proposed to quantify the relative impact of meteorology and emissions. Meteorology had a 35% impact, compared with an impact of-18% for emissions, when comparing the FC-affected event with that of the SP. The results from this study can provide guidance to policymakers for the implementation of effective control strategies.

关键词： WRF Community Multiscale Air Quality model source contribution unfavorable weather system fine partic-ulate matter

Spin injection into heavily-doped n-GaN via Schottky barrier

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2023年第8期44卷 57-61页

作者： zhenhao Sun Ning Tang Shuaiyu Chen Fan Zhang Haoran Fan Shixiong Zhang Rongxin Wang xi Lin Jianping Liu Weikun Ge Bo Shen State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Frontiers Science Center for Nano-optoelectronics&Collaboration Innovation Center of Quantum Matter Peking UniversityBeijing 100871China Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO) Chinese Academy of SciencesSuzhou 215123China International Center for Quantum Materials Peking UniversityBeijing 100871China

Spin injection and detection in bulk GaN were investigated by performing magnetotransport measurements at low temperatures.A non-local four-terminal lateral spin valve device was fabricated with Co/GaN Schottky *** spin injection efficiency of 21%was achieved at 1.7 *** was confirmed that the thin Schottky barrier formed between the heavily ndoped GaN and Co was conducive to the direct spin tunneling,by reducing the spin scattering relaxation through the interface states.

关键词： GaN spin injection Schottky barrier magnetoresistance