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| 1 | Extractive distillation: Advances in conceptual design, solvent selection,and separation strategies显示文摘Extractive distillation(ED) is one of the most promising approaches for the separation of the azeotropic or closeboiling mixtures in the chemical industry. The purpose of this paper is to provide a broad overview of the recent development of key aspects in the ED process involving conceptual design, solvent selection, and separation strategies. To obtain the minimum entrainer feed flow rate and reflux ratio for the ED process, the conceptual design of azeotropic mixture separation based on a topological analysis via thermodynamic feasibility insights involving residue curve maps, univolatility lines, and unidistribution curves is presented. The method is applicable to arbitrary multicomponent mixtures and allows direct screening of design alternatives. The determination of a suitable solvent is one of the key steps to ensure an effective and economical ED process. Candidate entrainers can be obtained from heuristics or literature studies while computer aided molecular design(CAMD) has superiority in efficiency and reliability. To achieve optimized extractive distillation systems, a brief review of evaluation method for both entrainer design and selection through CAMD is presented. Extractive distillation can be operated either in continuous extractive distillation(CED) or batch extractive distillation(BED), and both modes have been well-studied depending on the advantages in flexibility and low capital costs. To improve the energy efficiency, several configurations and technological alternatives can be used for both CED and BED depending on strategies and main azeotropic feeds. The challenge and chance of the further ED development involving screening the best potential solvents and exploring the energy-intensive separation strategies are discussed aiming at promoting the industrial application of this environmentally friendly separation technique. | Shirui Sun Liping Lü Ao Yang Shun'an Wei Weifeng Shen | 2019 | Chinese Journal of Chemical Engineering2019，27，6： | 6 |
| 2 | High responsivity 4H-SiC based metal-semiconductor-metal ultraviolet photodetectors显示文摘4H-SiC based metal-semiconductor-metal (MSM) photodetectors with diverse spacing were designed, fabricated, and characterized, in which nickel Schottky contacts were needed. Current-voltage and spectral responsivity measurements were carried out at room temperature. The fabricated 4 μm-spacing device showed a very low dark current (0.25 pA at 5 V bias voltage), a typical responsivity of 0.103 A/W at 20 V, and a peak re-sponse wavelength at 290 nm. The fabricated devices held a high DUV to visible re-jection ratio of >103. | YANG WeiFeng ZHANG Feng LIU ZhuGuang LüYing WU ZhengYun | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，11： | 4 |
| 3 | Multinode cooperative communications in wireless networks 显示文摘 | Ahmed S Weifeng S Ray L | 2007 | IEEE Trans Signal Proc2007，55，1： | 1 |
| 4 | Oxidation Be- havior of Ni-Cr-Fe-BasedAlloys: Effect of Alloy Microstruc- ture and Silicon Content显示文摘 | Liu Yingcai Wei Weifeng Benum L | 2010 | Oxid Met2010，73，1： | 1 |
| 5 | Cooperative commu- nication protocols in wireless networks: Performance a- nalysis and optimum power: allocation 显示文摘 | WEIFENG S AHMED K RAY L | 2008 | Wireless Per- sonal Communications2008，44，2： | 1 |
| 6 | On optimum selection relaying protocols in cooperative wireless networks显示文摘 | Weifeng S Xin L | | 0，，03： | 1 |
| 7 | A GaN/InGaN/AlGaN MQW RTD for versatile MVL applications with improved logic stability显示文摘To improve the logic stability of conventional multi-valued logic(MVL) circuits designed with a GaNbased resonate tunneling diode(RTD), we proposed a GaN/InGaN/AlGaN multi-quantum well(MQW) RTD. The proposed RTD was simulated through solving the coupled Schrodinger and Poisson equations in the numerical non-equilibrium Green's function(NEGF) method on the TCAD platform. The proposed RTD was grown layer by layer in epitaxial technologies. Simulated results indicate that its current-voltage characteristic appears to have a wider total negative differential resistance region than those of conventional ones and an obvious hysteresis loop at room temperature. To increase the Al composite of AIGaN barrier layers properly results in increasing of both the total negative differential resistance region width and the hysteresis loop width, which is helpful to improve the logic stability of MVL circuits. Moreover, the complement resonate tunneling transistor pair consisted of the proposed RTDs or the proposed RTD and enhanced mode HEMT controlled RTD_8 is capable of generating versatile MVL modes at different supply voltages less than 3.3 V, which is very attractive for implementing more complex MVL function digital integrated circuits and systems with less devices, super high speed linear or nonlinear ADC and voltage sensors with a built-in super high speed ADC function. | Haipeng Zhang Qiang Zhang Mi Lin Weifeng Lü Zhonghai Zhang Jianling Bai Jian He Bin Wang Dejun Wang | 2018 | Journal of Semiconductors2018，39，7： | 1 |
| 8 | Predic- tion of droplet size distribution in sprays of prefilming air-blast atomizers显示文摘 | LIU Haifeng GONG Xin L! Weifeng | 2006 | Chemical Engineering Science2006，61，6： | 1 |
| 9 | Studies on stannic oxide as an anode material for lithium-ion batteries显示文摘 | Weifeng L Xuejie H | 1998 | J Electrochem Soc1998，145，1： | 1 |
| 10 | Surgery of hepatocellular carcinoma complicated with cancer thrombi in bile duct: efficacy for criteria for different therapy modalities显示文摘 | Xiangji L Weifeng T Bin Y | 2009 | Langenbecks Arch Surg2009，394，6： | 1 |
| 11 | An efficient technique for improving methanol yield using dual C02 feeds and dry methane reforming显示文摘Steam methane reforming(SMR)-based methanol synthesis plants utilizing a single CO2 feed represent one of the predominant technologies for improving methanol yield and CO2 utilization.However,SMR alone cannot achieve full CO2 utilization,and a high water content accumulates if CO2 is only fed into the methanol reactor.In this study,a process integrating SMR with dry methane reforming to improve the conversion of both methane and CO2 is proposed.We also propose an innovative methanol production approach in which captured CO2 is introduced into both the SMR process and the recycle gas of the methanol synthesis loop.This dual CO2 feed approach aims to optimize the stoichio-metric ratio of the reactants.Comparative evaluations are carried out from a techno-economic point of view,and the proposed process is demonstrated to be more efficient in terms of both methanol productivity and CO2 utilization than the existing stand-alone natural gas-based methanol process. | Yang Su Liping Lü Weifeng Shen Shun'an Wei | 2020 | Frontiers of Chemical Science and Engineering2020，14，4： | 1 |
| 12 | Simulation of Water Age and Residence Time in New York Bight显示文摘 | Zhang Weifeng G Wilkin John L Schofield Oscar M E | 2010 | Journal of Physical Oceanography2010，，5： | 1 |
| 13 | Surgery of hepatocellular car- cinoma complicated with cancer thrombi in bile duct: efficacy for criteria for different therapy modalities 显示文摘 | Xiangji L Weifeng T Bin Y | 2009 | Langenbecks Arch Surg2009，394，6： | 1 |
| 14 | Editor's note显示文摘Along with the flourishing development of information science,the Internet has realized the interconnections among the ubiquitous entities in the cyber space.It brings the unceasing expansion of the interactive data,information,knowledge,and services.The frontier information science is expected to imitate the heuristic intelligence,including human cognition(e.g.attention,emotion,and wisdom)and natural attributes(e.g.,dynamics,and self-adaptability),to promote the evolution of the information techniques.Accordingly,Cybermatics(i.e.,cyberscienceand technology)emerges as an interdisciplinary involving three main aspects:the Internet of Things(IoT),cyber,physical and social computing,and green computing and communications. | HuanSheng NING JianHua MA Laurence T.YANG WeiFeng L XinDong WU Victor C.M.LEUNG Vincenzo PIURI | 2014 | Science China(Information Sciences)2014，57，3： | 0 |
| 15 | Metallurgical properties of CaO–SiO_(2)–Al_(2)O_(3)–4.6wt%MgO–Fe_(2)O_(3)slag system pertaining to spent automotive catalyst smelting显示文摘The metallurgical properties of the CaO–SiO_(2)–Al_(2)O_(3)–4.6wt%Mg O–Fe_(2)O_(3)slag system,formed by the co-treatment process of spent automotive catalyst(SAC)and copper-bearing electroplating sludge(CBES),were studied systematically in this paper.The slag structure,melting temperature,and viscous characteristics were investigated by Fourier transform infrared(FTIR)spectroscopy,Raman spectroscopy,Fact Sage calculation,and viscosity measurements.Experimental results show that the increase of Fe_(2)O_(3)content(3.8wt%–16.6wt%),the mass ratio of CaO/SiO_(2)(m(CaO)/m(SiO_(2)),0.5–1.3),and the mass ratio of SiO_(2)/Al_(2)O_(3)(m(SiO_(2))/m(Al_(2)O_(3)),1.0–5.0)can promote the depolymerization of silicate network,and the presence of a large amount of Fe_(2)O_(3)in form of tetrahedral and octahedral units ensures the charge compensation of Al^(3+)ions and makes Al_(2)O_(3)only behave as an acid oxide.Thermodynamic calculation and viscosity measurements show that with the increase of Fe_(2)O_(3)content,m(Ca O)/m(SiO_(2)),and m(SiO_(2))/m(Al_(2)O_(3)),the depolymerization of silicate network structure and low-melting-point phase transformation first occur within the slag,leading to the decrease in melting point and viscosity of the slag,while further increase causes the formation of high-melting-point phase and a resultant re-increase in viscosity and melting point.Based on experimental analysis,the preferred slag composition with low polymerization degree,viscosity,and melting point is as follows:Fe_(2)O_(3)content of 10.2wt%–13.4wt%,m(CaO)/m(SiO_(2))of 0.7–0.9 and m(SiO_(2))/m(Al_(2)O_(3))of 3.0–4.0.This work provides a theoretical support for slag design in co-smelting process of SAC and CBES. | Ruili Zheng Jianfang Lü Weifeng Song Mudan Liu Huashan Li Yong Liu Xianjin Lü Zhiyuan Ma | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，5： | 0 |
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