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IOP Conference Series: Earth and Environmental Science 2019年第4期227卷

作者： Qingbo Hu Kun Wang Li Zhang Liansheng Zhou Rong Chen Shan Wang Yu Zhang Guohao Li Tianjin Electric Power Science & Research Institute Tianjin 300384 State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiao Tong University Xi'an 710049.

The power grid peaking capacity is insufficient due to the increasing installed capacity of renewable power. Moreover, it is also restricted by the operation mode of combined heat and power units (CHPs), the minimum electricity loads of which are determined by the heat load. It is significant to study the heat-electricity decoupling technologies for CHPs. Therefore, the low-pressure steam turbine renovation technology is studied in this paper with a 300MW unit as reference case. Results show that the minimum electric load rate and the coal consumption are decreased, and the heat-electricity ratio is increased significantly for CHP with low-pressure steam turbine renovation. When the heat load is 1200 GJ/h, the minimum electric load rate and coal consumption with low-pressure steam turbine renovation can be reduced by 32.4 and 30.9 % respectively. The heat-electricity ratio can be increased by 68.8 % after renovation of low-pressure steam turbine.

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On-Line Measurement of Ultralow Mass Concentration Particulate Based on Light Scattering Coupled with Beta Ray Attenuation Method

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SSRN 2022年

作者： Liu, Xiaowei Huang, Yubo Wang, Zhaofeng Jiang, Meng Zhou, Zijian Xu, Minghou Han, Jinke Yang, Bin Fan, Xinfeng State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology 1037 Luoyu Road Wuhan430074 China JXIC Energy Technology Research Institure Nanchang330000 China Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering University of Shanghai for Science and Technology Shanghai200093 China Wuhan Tianhong Environmental Protection Industry Co. Ltd Yuhong Environmental Protection Science and Technology Industrial Park No.11 Huashiyuan North Road Miaoshan District Donghu high tech Development Zone Wuhan430074 China

Light scattering method is the most commonly used method for on-line measurement of ultralow particulate matter mass concentration. However, when the particle characteristics change, the effectiveness of the empirical relationship decreases, which would lead to a sizeable deviation. To accurately measure the mass concentration of particulate matter in real-time, a coupling measurement idea of light scattering and beta-ray attenuation is proposed. The beta-ray attenuation is little affected by particle properties and accurately reflects the average PM mass concentration in the measured period. The single calibration method (M1), periodic calibration method (M2), average calibration method (M3), and asymmetric factor calibration method (M4) are formed based on the coupling idea. The results of all methods are perfect when the particle size is unchanged. However, when the particle sizes fluctuate frequently, the results of M1, M2, and M3 deviate seriously from the actual value, and the applicable working conditions have limitations. The results of M4 are in good agreement with the actual value, and the effectiveness is not limited by the particle size. Finally, the prototype based on experimental exploration was developed and had been continuously operated for more than 528 hours at a 1000 MW unit of a coal-fired power plant. © 2022, The Authors. All rights reserved.

关键词： Particle size

Current Density Regulating Lithium Metal Directional Deposition for Long Cycle Life Lithium Metal Batteries

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SSRN 2020年

作者： Mao, Heng Yu, Wei Cai, Zhuanyun Liu, Guixian Liu, Limin Wen, Rui Su, Yaqiong Xi, Kai Li, Benqiang Da, Xinyu Kou, Huari Yan, Wei Ding, Shujiang Xi'an Key Laboratory of Sustainable Energy Materials Chemistry School of Chemistry Xi’an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power Xi’an Jiaotong University Xi’an710049 China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing100190 China Cambridge Graphene Centre Department of Engineering University of Cambridge CambridgeCB3 0FA United Kingdom Department of Mechanical Engineering University of Michigan-Dearborn DearbornMI48128 United States Department of Environmental Science and Engineering State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China

Uncontrolled dendrite formation in the high energy density of lithium metal batteries (LMBs) may pose serious safety risks. Numerous works have been reported to protect separator. However, these methods still couldn’t inhibit the dendrite upward growth to protect the separator, effectively. Here, we introduce a novel “orientated-growth” strategy that makes the depositional interface transfer to the anode/current collector interface from the anode/separator interface. We placed a layer of cellulose/graphene carbon composite aerogel (CCA) between the current collector and the anode (CCA-Li). This layer works as the charge organizer;it induces a higher current density distribution and makes Li prefer to deposit in the bottom CCA layer of CCA-Li electrode. Both in-situ and ex-situ images of the electrode demonstrate the anode part of the cell has been flipped;with the new deposited particles facing the current collector and smooth surface facing the separator. Electrochemical characterization of the electrode in half and full cells showed outstanding cyclic stability and rate capability, with the CCA-Li/LPF full cell able to maintain 94% of its initial capacity after 1000 cycles. We believe that the innovative strategy would promote the leapfrog development for LMBs. © 2020, The Authors. All rights reserved.

关键词： Electric current collectors

Corrigendum to “Huge wave and drop entrainment mechanism in gas–liquid churn flow” [Chem. Eng. Sci. 108 (2013) 638–646]

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Chemical engineering Science 2017年 158卷 624-624页

作者： Ke Wang Bofeng Bai Weimin Ma State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710049 China Royal Institute of Technology (KTH) Stockholm 10691 Sweden

Erosion of water-based fracturing fluid containing particles in a sudden contraction of horizontal pipe

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Journal of Physics: Conference Series 2017年第1期916卷

作者： Jiarui Cheng Yinping Cao Yihua Dou Zhen Li State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China. Department of Mechanical Engineering Xi'an Shiyou University Xi'an China.

A lab experiment was carried out to study the effects of pipe flow rate, particle concentration and pipe inner diameter ratio on proppant erosion of the reducing wall in hydraulic fracturing. The results show that the erosion rate and erosion distribution are different not only in radial direction but also in circumferential direction of the sample. The upper part of sample always has a minimum erosion rate and erosion area. Besides, the erosion rate of reducing wall is most affected by fluid flow velocity, and the erosion area is most sensitive to the change in the diameter ratio. Meanwhile, the erosion rate of reducing wall in crosslinked fracturing fluid is mainly determined by the fluid flowing state due to the high viscosity of the liquid. In general, the increase in flow velocity and diameter ratio not only cause the expansion of erosion-affected flow region in sudden contraction section, but also lead to more particles impact the wall.

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聚丙烯酸酯修饰铜电极用于电化学二氧化碳还原选择性生成多碳产物（英文）

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Science Bulletin 2024年第15期 2395-2404页

作者：石玉川张凯妮董崇礼 Ta Thi Thuy Nga 汪淼魏代星王佳琳王亦清沈少华 International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Department of Physics Tamkang University

Highly selective production of value-added multicarbon(C2+) products via electrochemical CO2reduction reaction（eCO2RR） on polycrystalline copper（Cu） remains ***,the facile surface modification using poly（α-ethyl cyanoacrylate）(PECA) is presented to greatly enhance the C2+selectivity for eCO2RR over polycrystalline Cu,with Faradaic efficiency（FE） towards C2+products increased from30.1% for the Cu electrode to 72.6% for the obtained Cu-PECA electrode at -1.1 V *** hydrogen electrode（RHE）.Given the well-determined FEs towards C2+products,the partial current densities for C2+production could be estimated to be-145.4 mA cm-2for the Cu-PECA electrode at -0.9 V *** in a homemade flow ***-situ spectral characterizations and theoretical calculations reveal that PECA featured with electron-accepting-C≡N and-COOR groups decorated onto the Cu electrode could inhibit the adsorption of *H intermediates and stabilize the *CO intermediates,given the redistributed interfacial electron density and the raised energy level of d-band center（Ed） of Cu active sites,thus facilitating the C-C coupling and then the C2+selective *** study is believed to be guidable to the modification of electrocatalysts and electrodes with polymers to steer the surface adsorption behaviors of reaction intermediates to realize practical eCO2RR towards value-added C2+products with high activity and selectivity.

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Lithium Extraction from High Magnesium Salt Lake Brine with an Integrated Membrane Technology

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SSRN 2022年

作者： Ashraf, Muhammad Awais Usman, Muhammad Hussain, Iftikhar Ahmad, Faraz Guo, Shiwei Zhang, Lu State Key Laboratory of Multiphase Complex Systems CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 PR China University of Chinese Academy of Sciences Beijing100049 China Washington State University United States Department of Mechanical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong Key Laboratory of Coal Science and Technology Taiyuan University of Technology Taiyuan030024 China North China Electric Power University Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control Department of Environmental Science and Engineering Baoding071000 China Faculty of Economics and Business

Lithium extraction is a great challenge from the high magnesium content salt solution. In this work, an integrated polyamide tight ultrafiltration (UF) and nanofiltration (NF) membranes are systematically investigated to separate Li+ from a high magnesium salt solution. Tight ultrafiltration UA001 and nanofiltration NF270 membranes in the integrated-cascade system not only increased Li+ permeation to 82.5% but also enhanced the high Mg2+ retention to 94.6% from the ternary salt solution of LiCl and MgCl2. The transport model was also developed to calculate the real retention of Li+ and Mg2+, under constant pressure mode. The separation efficiency SFLi/Mg for the ternary salt solution of LiCl+MgCl2+H2O was more than 15 at a constant pressure of 25 bars with an integrated membrane process, which was higher as compared to single-stage UF and NF270 membranes. Moreover, the high Mg2+/Li+ ratio was also reduced from 30 to 1.9 in the integrated-cascade membrane process. © 2022, The Authors. All rights reserved.

关键词： Magnesium compounds

Correction to: Glucose in Conjunction with Multiple Laser Pulses on Laser Treatment of Port-wine Stain: An in vivo Study

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Lasers in medical science 2018年第9期33卷 2015页

作者： Jun Ma Bin Chen Dong Li Yue Zhang Zhaoxia Ying State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 Shaanxi China. State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 Shaanxi China. chenbin@***. Department of Dermatology Second Affiliated Hospital Xi'an Jiaotong University Xi'an 710049 Shaanxi China. yzx1919@***.

In the originally published article, the title was incorrectly copied from another article. The correct title is "Glucose in Conjunction with Multiple Laser Pulses on Laser Treatment of Port-wine Stain: An in viv... 详细信息

关键词： MUTATION (Biology) PORT wine DERMATOLOGY IPILIMUMAB (Drug) DYE lasers

Boosted Photocatalytic Co2 Reduction by Induced Electromotive Force in Rotating Magnetic Field

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SSRN 2023年

作者： Lu, Danchen Ren, Yuqi Yang, Ya Cheng, Miao Wang, Ke Wang, Nan Liu, Maochang Zhou, Jiancheng Chen, Wenshuai Li, Naixu School of Chemistry and Chemical Engineering Southeast University No.2 Dongnandaxue Road Jiangsu Nanjing211189 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China Key Laboratory of Bio-Based Material Science and Technology Ministry of Education Northeast Forestry University No. 26 Hexing Road Harbin150040 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University No.28 Xianning West Road Shaanxi Xi'An710049 China

Charge separation plays a crucial role in semiconductor-based photocatalytic CO2 conversion. Herein, we report a unique induced electric field, which can actively manipulate carrier behavior at the minuscule, leading to significantly boosted photocatalytic CO2 reduction in H2O vapor. The success relies on the development a monolithic photocatalyst made of a copper foam substrate and nanosized ZnO/NiO/Au heterostructures that can effectively couple a special rotating magnetic field (RMF). Specifically, the copper foam cuts the magnetic induction line, leading to the periodic generation of induced electric field. This induced electric field could significantly increase the carriers' density by preventing their recombination. Moreover, NiO and Au as the active sites for oxidation and reduction, respective, synergistically magnify this effect. As a result, compared with the photocatalytic reaction without adding RMF, the utilization rate of photogenerated electrons increases by 5.24 times after coupling RMF, with the yield of CO and CH4 improved by 5.50 times and 5.18 times. This strategy by integrating unique RMF into the reaction system provides new insights for improving photocatalytic CO2 conversion. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

Compositional Variations in Highly Active Ptsn/Al2o3 Catalysts Derived from Molecular Complexes

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SSRN 2023年

作者： He, Qian Xu, Chaokai Tan, Shengdong Tang, Yaxin Xi, Shibo Yao, Bingqing Wade, Austin Zhao, Binbin Lu, Shangchen Tian, Mingjiao He, Chi Ma, Lu Fu, Xingjie Shi, Jiwei Lu, Jiong Howe, Alexander G.R. Dai, Sheng Luo, Guangfu Du, Yankun Department of Material Science and Engineering College of Design and Engineering National University of Singapore 9 Engineering Drive 1 EA #03-09 Singapore117575 Singapore Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology Guangdong Shenzhen518055 China 1 Pesek Road Jurong Island 627833 Singapore Thermo Fisher Scientific 5350 NW Dawson Creek Drive HillsboroOR United States State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi’an Jiaotong University Shaanxi Xi’an710049 China Brookhaven National Laboratory UptonNY11973 United States Department of Chemistry National University of Singapore 12 Science Drive 2 117549 Singapore Key Laboratory for Advanced Materials Joint International Research Laboratory of Precision Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering East China University of Science & Technology Shanghai200237 China

We investigated the industrially important PtSn/Al2O3 catalysts prepared with uniform particle sizes (~ 1 nm) and varied compositions using molecular complexes of Pt(II) and Sn(II). Our best catalyst, with a Sn:Pt ratio of around 2, exhibited a high initial propylene productivity of about 1.1 mol C3H6 (g catalyst)-1 h-1. Elaborate electron microscopy studies revealed significant compositional variations in the catalyst, highlighting the practical challenges in achieving or confirming the theoretically predicted optimum Sn:Pt ratio. It is also found that the catalytic activities correlate well with the Pt dispersion, suggesting the structure-insensitive nature of the dehydrogenation reaction applies in these ultrasmall Pt-Sn nanoparticles. The presence of Pt-rich particles in the catalysts did not produce noticeable degradations in the reaction selectivity, indicating a wide composition range for Pt-Sn nanoparticles to be effective at the 1 nm size range. These findings emphasize the importance of detailed analysis of compositional distributions for understanding nanoalloys. © 2023, The Authors. All rights reserved.

关键词： Electron microscopy