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2016年大连国际微流控和芯片实验室大会

作者： Boyao Wen Chengzhen Sun Bofeng Bai State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Ions at the oil-water interface is a ubiquitous phenomenon which plays a important role in many industrial processes,such as extraction separation,nanoparticle assembly,enhanced oil recovery,*** the petroleum industry,due to the long-term interaction with solids and crude oil,the water including formation water,injection water and aqueous solution dissolves lots of ions,such as Na,K,Ca,Mg Cl,SO,*** migration of charged ions in the bulk phase or interface between oil and water has a significant influence on the molecular packing of active species at the interface,zeta potential of oil droplets and microstructure and strength of interfacial film by changing the interfacial tension,interface viscosity and electrical repulsion of charged ganglia,thus affecting the stability of crude oil emulsions and the oil displacement in porous ***,more detailed knowledge of how ions affect the properties of oil-water interface is ***,we perform a molecular dynamics（MD） study on the effects of ions on the oil-water interface using the LAMMPS package in the NVT *** temperature of the system is kept at 300 K via Nose-Hoover *** simulation box,whose volume equals to4×4×11.4 nm,is divided into two layers of oil and water *** boundary conditions are applied in x-,y-and *** is adopted as the oil phase according to "equivalent alkane carbon number"（EACN） value of crude *** are arranged uniformly in the water *** and Clions are involved,because they are basic components of brine and quite common in the *** atomic interactions between decane molecules are described by the OPLS-AA potential while the TIP3 P model of water is adopted to consider both dispersive and electrostatic *** cut-off distance of all potentials is 10 *** results demonstrate that the structures and dynamics of the oil-water interface is significantly affected by Na and *** kosmotropes,Na ions remain strongly h

关键词： The effects of Na and Cl ions on the oil-water interface:a molecular dynamics study

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LIGGGHTS and EDEM application for charging system of ironmaking blast furnace

LIGGGHTS and EDEM application for charging system of ironmak...

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2017年全国高炉炼铁学术年会

作者： Yaowei Yu Jian Zhang Henrik Saxén State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai University Thermal and Flow Engineering Laboratory Department of Chemical EngineeringAbo Akademi University Chengdu Base Panzhihua Iron & Steel Research Institute Co.LTD

Chemical reactions of the gas and the burden are decided by burden distribution,in particular the radial distribution of pellet or sinter and coke in blast *** appropriate control of burden distribution is required to yield a smooth operation with effective performance and an appropriate gas flow at the *** paper studies DEM application for charing system of ironmaking blast *** simulations(EDEM and liggghts),which are based on the discrete element method(DEM),are validated using mass fraction distribution in the trajectory of pellet flow and burden distributions of pellet on a horizontal *** results show good agreements are found between EDEM and experiment,liggghts and experiment and liggghts and *** shear modulus of material can increase calculation speed of DEM.

关键词： Blast furnace charging system burden distribution Liggghts EDEM

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Multi-source driven capillary plane radiation air conditioning system

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AIP Conference Proceedings 2017年第1期1864卷

作者： Juanjuan Hu Mofeng Qu Huasheng Wang Shiyao Ni State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an China

A new absorption refrigeration system, which is driven by solar energy, biomass energy and geothermal energy simultaneously, was designed with capillaries as its radiation surface. Likewise, variations of water temperature in the capillaries with the change in both time and its flow rate were experimentally researched as well as how COP of the system varies with the surrounding temperature. The following conclusions have been obtained: Common refrigeration demand can be met by the system after its operation in 1 hour; with the increase in water flow rate in the capillaries, its temperature, which drops down after an increase, gets its peak value at the flow rate of 4.5-5.5 L/min; COP of the system decreases with the rise of surrounding temperature, thus it’s better to keep it from direct sunlight. With the utilization of natural energy and the structure of capillaries, the system’s advantages in simple structure, low cost, environment-friendly working process and nice performance lead to promising application prospects, especially in residence refrigeration in countryside.

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Three-dimensional positioning method for moving particles based on defocused imaging using single-lens dual-camera system

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Chinese Optics Letters 2016年第3期14卷 42-46页

作者：周骛金娜贾敏华杨荟楠蔡小舒 Institute of Particle and Two-Phase Flow Measurement/Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering University of Shanghai for Science and Technology Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast University

A method to three-dimensional position moving particles with one lens and two cameras is proposed. Two par- ticle images with different degrees of defocusing are adopted to solve the ambiguous problem of particle positions. A single-lens dual-camera system is developed to simultaneously capture these two images for the moving par- ticles. The measurement principles and theoretical analysis are introduced first, and then simulated investiga- tions and experimental research are discussed. The measurement errors in the simulations and experiments are less than 1% and 4%, respectively, in 20 times the depth of field of the system, which validates the feasibility of this method.

关键词： Optics Physics

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Review of Vacuum Arc Remelting Technology Studies

Review of Vacuum Arc Remelting Technology Studies

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The 7th International Conference on Modelling and Simulation of Metallurgical Processes in Steelmaking

作者： WEI Han ZAN Lei ZHANG Hongbin ZHANG Jian Saxén Henrik YU Yaowei State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai University Chengdu Base Panzhihua Iron & Steel Research Institute Co.Ltd. Thermal and Flow Engineering Laboratory Department of Chemical Engineering?bo Akademi University

Vacuum arc remelting(VAR) is a casting process carried out in a vacuum with the aim of remelting the consumable/inconsumable electrode in such a way that the new ingot has improved chemical and physical homogeneity, melting and solidification process used to produce high quality ingots of segregation sensitive alloys. In present paper, development of vacuum arc remelting furnace in past two decades is reviewed and various defects in VAR leading to the macrosegregation and microsegregation are summarized. Different mathematical models of VAR and comparison among them, as well as operations and control strategies of VAR are also discussed.

关键词： vacuum arc remelting mathematical model white spots defects segregation fluid flow

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Simulation on the flue gas pre-dried lignite-fired power plants firing high moisture lignite 29

Simulation on the flue gas pre-dried lignite-fired power pla...

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29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems, ECOS 2016

作者： Han, Xiaoqu Karellas, Sotirios Mu, Qiwei Liu, Ming Liu, Jiping Yan, Junjie Rakopoulos, Dimitrios Kakaras, Emmanuel State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China Laboratory of Steam Boilers and Thermal Plants National Technical University of Athens 9 Heroon Polytechniou Street Zografou15780 Greece

ISBN: (纸本)9789616980159

The integration of flue gas fan mill dryer with an open pulverizing system significantly improves the plant thermal efficiency of the Flue Gas Pre-dried Lignite-fired Power Systems (FPLPS). The aim of this article is to simulate the flue gas drying process applied for high moisture lignite and to find an optimal operation mode for various lignite compositions. A previously validated GSE simulation model of the FPLPS is used in the present work. Two types of lignite from China and Greece have been investigated as the feeding coal. The plant thermal efficiency of a 600 MW supercritical unit increases by 1.46 % at design case when the moisture content of lignite is being reduced from 39.50 % to 12 %. The improvement value reduces from 1.46 % to 1.19 % in water-cooled units and 1.39 % to 1.13 % in air-cooled units when the moisture content of Chinese raw lignite decreases from 39.50 % to 29.95 %. When Greek lignite is supplied, with moisture content varying from 53.20 % to 60 %, and lower heating value from 5.44 MJ·kg-1 to 6.31 MJ·kg-1, the plant thermal efficiency drops by a maximum value of 0.53 %, without considering the limited drying capacity of the pulverizing system. Moreover, two operational modes are compared in order to address the issues of fuel type variation, including the adjustment of the drying degree to maintain the boiler load, as well as the reduction of the boiler steam output. Case studies are presented to highlight the importance of the match between lignite pre-drying system and the boiler thermal system. Both the energy-saving potential and the flexibility to fuel type variations are concluded as the benefits of lignite flue gas pre-drying. © 2016 University of Ljubljana.

关键词： Flue gases

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A ‐Oriented Hittorf's Phosphorus Nanorods/Polymeric Carbon Nitride Heterostructure for Boosting Wide‐Spectrum‐Responsive Photocatalytic Hydrogen Evolution from Pure Water

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Angewandte Chemie 2019年第2期132卷

作者： Yukun Zhu Chunxiao Lv Zhuocheng Yin Jun Ren Xianfeng Yang Chung‐Li Dong Hongwei Liu Rongsheng Cai Yu‐Cheng Huang Wolfgang Theis Shaohua Shen Dongjiang Yang State Key Laboratory of Bio-fibers and Eco-textiles Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles Institute of Marine Biobased Materials School of Environmental Science and Engineering Qingdao University Qingdao 266071 P. R. China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 P. R. China School of Chemical and Environmental Engineering North University of China Taiyuan 030051 P. R. China Analytical and Testing Centre South China University of Technology Guangzhou 510640 P. R. China Research Center for X-ray Science & Department of Physics Tamkang University Tamsui 25137 Taiwan The Australian Centre for Microscopy & Microanalysis The University of Sydney Sydney New South Wales 2006 Australia Nanoscale Physics Research Laboratory School of Physics and Astronomy University of Birmingham Birmingham B15 2TT UK

Red phosphorus is a promising photocatalyst with wide visible‐light absorption up to 700 nm, but the fast charge recombination limits its photocatalytic hydrogen evolution reaction (HER) activity. Now, [001]‐oriented Hittorf's phosphorus (HP) nanorods were successfully grown on polymeric carbon nitride (PCN) by a chemical vapor deposition strategy. Compared with the bare PCN and HP, the optimized PCN@HP hybrid exhibited a significantly enhanced photocatalytic activity, with HER rates reaching 33.2 and 17.5 μmol h −1 from pure water under simulated solar light and visible light irradiation, respectively. It was theoretically and experimentally indicated that the strong electronic coupling between PCN and [001]‐oriented HP nanorods gave rise to the enhanced visible light absorption and the greatly accelerated photoinduced electron–hole separation and transfer, which benefited the photocatalytic HER performance.

关键词： Heterostrukturen Nanostäbe Hittorfscher Phosphor Kohlenstoffnitrid Wasserspaltung

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One-dimensional Cu-based catalysts with layered Cu-Cu20-CuO walls for the Rochow reaction

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Nano Research 2016年第5期9卷 1377-1392页

作者： Jing Li Zailei Zhang Yongjun Ji Zheying Jin Shanying Zou Ziyi Zhong Fabing Su State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 1 O0190 China University of Chinese Academy of Sciences Beijing 100049 China School of Chemical & Biomedical Engineering Nanyang Technological University (NTU) Singapore 637459 Singapore

A series of copper catalysts with a core-shell or tubular structure containing various contents of Cu, Cu2O, and CuO were prepared via controlled oxidation of Cu nanowires （NWs） and used in the synthesis of dimethyldichlorosilane （M2） via the Rochow reaction. The Cu NWs were prepared from copper （Ⅱ） nitrate using a solution-based reduction method. The samples were characterized by X-ray diffraction, thermogravimetric analysis, temperature-programmed reduction, X-ray photoelectron spectroscopy, transmission electron microscopy, and scanning electron microscopy. It was found that the morphology and composition of the catalysts could be tailored by varying the oxidation temperature and time. During the gradual oxidation of Cu NWs, the oxidation reaction inflated on the outer surface and gradually developed into the bulk of the NWs, leading to the formation of catalysts with various structures and layered compositions, e.g., Cu NWs with surface Cu2O, ternary Cu-Cu2O-CuO core-shell NWs, binary Cu2O-CuO nanotubes （NTs）, and single CuO NTs. Among these catalysts, ternary Cu-Cu2O-CuO core-shell NWs exhibited superior M2 selectivity and Si conversion in the Rochow reaction. The enhanced catalytic performance was mainly attributed to improved mass and heat transfer resulting from the peculiar heterostructure and the synergistic effect among layered components. Our work indicated that the catalytic property of Cu-based nanoparticles can be improved by carefully controlling their structures and compositions.

关键词： controlled oxidation nanowires core-shell structure nanotubes copper-based catalysts Rochow reaction

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Corrigendum to ‘Numerical simulation on sonic steam jet condensation in subcooled water through a double-hole nozzle’ [Int. J. Heat Mass Transfer 115 (2017) 143–147]

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International Journal of Heat and Mass Transfer 2017年 115卷 1360-1360页

作者： Lutao Wang Daotong Chong Lun Zhou Weixiong Chen Junjie Yan State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an 710049 PR China

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Preparation and characterization of urea-formaldehyde resin]reactive kaolinite composites

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Particuology 2016年第1期14卷 203-209页

作者： Shiwei CheN Xuchen Lu Tizhuang Wang Zhimin Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China United Research Center for Resources and Materials Wuhai O16000 China

Novel urea-formaldehyde resin/reactive kaolinite composites containing 20-40wt%; kaolinite were prepared by in situ polymerization. The kaolinite was modified with tetraethoxysilane and a silane coupling agent to introduce reactive groups. Fourier-transform infrared spectroscopy and X-ray diffraction confirmed preparation of the urea-formaldehyde resin/reactive kaolinite composites. The composite morphology was investigated using scanning electron microscopy; the composites consisted of uni- form spherical particles. The surface chemical components of the composites were determined using energy-dispersive X-ray spectroscopy. The spectra showed that the reactive kaolinite was encapsulated by the urea-formaldehyde resin. The thermal properties of the composites were examined using dif- ferential scanning calorimetry and thermogravimetric analysis. The results showed that their thermal stability was much better than that of pure urea-formaldehyde resin, Reactive kaolinite addition greatly decreased formaldehyde emissions and improved the water resistance of the composites. A mechanism for urea-formaldehyde resin/reactive kaolinite composite synthesis is proposed.

关键词： Composites Reactive kaolinite Urea-formaldehyde resin Morphology Thermal property

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