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Deep Desulfurization via Adsorption by Silver Modified Bentonite

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china Petroleum Processing & Petrochemical technology 2011年第3期13卷 16-20页

作者： Tang Xiaolin Le Zheting Shi Li (State Key Laboratory of chemical engineering,east china university of science and technology,shanghai 200237) State Key Laboratory of chemical engineering East China University of Science and Technology Shanghai 200237 China

In order to further reduce the sulfur content in liquid hydrocarbon fuels,a desulfurization process by adsorption for removing alkyl dibenzothiophenes was *** of model gasoline by bentonite adsorbents loaded with silver nitrate was *** test results indicated that the bentonite adsorbents loaded with Ag + ions were effective for adsorbing the alkyl *** crystal structure of bentonite adsorbents was characterized by X-ray diffraction (XRD) and their acidity was measured by Fourier transform infrared (FT-IR) *** factors influencing the desulfurization capability,including the Ag + loading,the baking temperature,as well as the reaction temperature,were *** desulfurization efficiency was enhanced by increasing the Ag + loading and the best result was obtained at a silver loading of 7 m%.It was found that the adsorption capacity of the alkyl dibenzothiophenes on bentonite loaded with Ag + ions increased with a decreasing *** of the adsorbent could also improve the desulfurization capacity,and the optimum baking temperature was 423 K.

关键词： desulfurization bentonite adsorbent silver ion

AN EXPERIMENTAL INVESTIGATION ON DIVIDING FLOW THROUGH A CHANNEL BY LDA

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Journal of Hydrodynamics 1995年第4期7卷 42-46页

作者： Ye Wen Li Sheng Wu Min-quan(State Key chemical engineering Laboratory east china university of science and technology, shanghai 200237, P. R. china) east china Univ of science and Technology Shanghai China

A Laser Doppler Anemometer (LDA) is used to measure and study the dividing flows in channels which are straight and annular with single opening or multi-openings. Flow patterns, distribution of velocities and pressures, and allotment of now volumes are obtained in detail. Results show that dividingflow is very *** of the openings, shape o f the channel, and the backpressure in the channel affect the flow patterns of the dividing flow.

关键词： Laser Doppler Anemometer channel dividing flow

Effect of the Structure and Acidic Property of Activated Bentonite on Removal of Olefin in Aromatics

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china Petroleum Processing & Petrochemical technology 2009年第4期11卷 23-26页

作者： Wu Wenjuan Chen Changwei Wang Xin Shi Li (The State Key Laboratory of chemical engineering,east china university of science and technology, shanghai 200237) State Key Laboratory of chemical engineering East China University of Science and Technology Shanghai 200237 China

In this research work,three kinds of activated bentonite used as solid acid catalysts had been synthesized and studied on removal of olefins from the reformate *** bentonite samples were analyzed using the BET and pyridine-FTIR measurements to investigate their physical and chemical *** results showed that both textural properties and surface acidity of the bentonite could affect the catalytic *** the catalyst samples,one kind of bentonite purchased from Hubei with high surface area,high pore volume and more acid sites revealed high activity in removing olefins from the reformate.

关键词： bentomte N_2 adsorption isotherm pore size distribution acid sites

AN INVESTIGATION INTO IMPINGEMENT JETS IN CYLINDRICAL CHAMBER

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Journal of Hydrodynamics 1991年第1期3卷 90-94页

作者： Yu Jie Wu Min-quan Dai Gan-ce Zhang Li, UNILAB research center of chemical Reaction engineering, east china university of chemical Technolvgy, shanghai 200237, P. R. china east china Univ of chemical Technology Shanghai China

Laser Doppler Anemometer (LDA) is used for studying the effects of various parameters of impingement jets in cylindrical chamber (IJCC), such as d/D, H/d, γ (momentum ratio) and Re, on flow pattern, as well as those on turbulence intensity. Experimental results show that turbulence intensity is enhanced with decrease of II/d and/ or increase of d/D; and turbulence intensity approaches to a maximum as T=1. Re imposes a quite complicated in- fluence. In case the jet velocity remains unchanged, turbulence intensities might keep almost constant when Re's vary even a magnitude of order.

关键词： Re AN INVESTIGATION INTO IMPINGEMENT JETS IN CYLINDRICAL CHAMBER

Removal of Trace Olefins from Aromatics Catalyzed by[bmim]Br-AlCl_3 Ionic Liquid

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china Petroleum Processing & Petrochemical technology 2010年第2期12卷 41-44页

作者： Jiang Zhenghong Hou Minghui Weng Huixin Shi Li (State Key Lab of chemical engineering,east china university of science & technology,shanghai 200237) State Key Lab. of chemical engineering East China University of Science and Technology Shanghai 200237 China

1-Butyl-3-methylimidazolium bromochloroaluminate （[bmim]Br-AlCl3） ionic liquid was used as an acid catalyst for removal of trace olefins from the aromatic hydrocarbons. The influence of various reaction parameters such as reaction time, temperature, dosage and acid strength of catalyst was investigated. The experimental results demonstrated that the ionic liquid exhibited excellent activity under mild reaction conditions, with the conversion of olefins reaching 98.84% and the bromine index of the aromatics varying from 1129 to 13. On the basis of the results obtained, thereof, a possible reaction mechanism was proposed.

关键词： ionic liquid bromine index olefins removal aromatics catalyst

Seamlet carving for shape-aware image resizing

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science china(Information sciences) 2012年第5期55卷 1073-1081页

作者： LIN Xiao 1,2,SHENG Bin 1,MA LiZhuang 1,SHEN Yang 1 & CHEN ZhiHua 3 1 Department of Computer science and engineering,shanghai Jiao Tong university,shanghai 200240,china 2 Academy of Information technology,Luoyang Normal university,Luoyang 471022,china 3 Department of Computer science and engineering,east china university of science and technology,shanghai 200237,china Department of Computer science and engineering Shanghai Jiao Tong University Shanghai China Academy of Information technology Luoyang Normal University Luoyang China Department of Computer science and engineering East China University of Science and Technology Shanghai China

In this paper we propose an optimized seam-carving approach for anti-shearing image *** image/video seam-carving strategy only focuses on deleting the pixels along 8-connected seams,which may lead to the obvious information loss during *** the traditional seam-carving methods,our approach can construct a seamlet to handle the discontinuous pixels and further achieve an optimized image resizing results with *** particular,to suppress zigzag artifacts,we introduce the anti-shearing energy into the seamlet generation,which includes two steps:1) the energy map is formalized by using Gabor filtering and the saliency map;2) The energy computation is optimized in Gabor feature space to obtain the resizing results without the connectivity *** experimental results and comparisons show the effectiveness of our method.

关键词： image resizing seamlet carving saliency map

Fabrication and Properties of Multilayer Chitosan Membrane Loaded with Tinidazole

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Journal of Wuhan university of technology(Materials science) 2007年第1期22卷 102-107页

作者：洪华刘昌胜 engineering research center of Biomedical Materials under Ministry of Education East China University of Science and Technology

With the aim of providing effective periodontal disease therapeutic method, multilayer membranes which were loaded with drug for guided tissue regeneration were prepared using an immerseprecipitation phase inversion technique. Single layer, bi-layer and tri-layer membranes were fabricated with chitosan used as cartier and tinidazole as medicine model which was loaded on the membrane. The influence of layer on structure and properties of membrane were studied by SEM, UV spectrophotometer and mechanical test. Drug release properties of three types of layer membranes were also investigated. The results showed that release rate could be slown down in both bi-layer and tri-layer membranes （to 11 days and 14 days respectively） and tri-layer membrane lasted the longest. After a process of rapid release, the concentration of tinidazole which was released by the membrane was maintained at an efficient dosage level. Compared with single layer and bi- layer membranes, we found tri-layer membrane could play a role in controlling low-rate drug release especially at the early stage of release, and keep an efficient dosage at affected part for a long period of time. The loss of drug which loaded on membrane decreased from 84.6% for single layer to 13.04% for tri-layer. The mechanical strength of three types of membrane were detected and showed that it could meet the requiremens of clinical practice. The membranes especially with tri-layer could be more valuable in application.

关键词： chitosan membrane multilayer drug loss release rate

On-column Refolding of an Insoluble His6-tagged Recombinant EC-SOD Overexpressed in Escherichia coli

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Acta Biochimica et Biophysica Sinica 2005年第4期37卷 265-269页

作者： Xi-Qiang ZHU Su-Xia LI Hua-Jun HE Qin-Sheng YUAN State Key Laboratory of Bioreactor engineering and Institute of Biochemistry,east china university of science and technology,shanghai 200237,china State Key Laboratory of Bioreactor engineering and Institute of Biochemistry East China University of Science and Technology Shanghai 200237 China

The EC-SOD cDNA was cloned by polymerase chain reaction （PCR） and inserted into theEscherichia coli expression plasmid pET-28a（+） and transformed into *** BL21 （DE3）.The correspondingprotein that was overexpressed as a recombinant His6-tagged EC-SOD was present in the form of inactiveinclusion *** structure was first solubilized under denaturant conditions （8.0 M urea）.Then,after acapture step using immobilized metal affinity chromatography （IMAC）,a gradual refolding of the protein wasperformed on-column using a linear urea gradient from 8.0 M to 1.5 M in the presence of glutathione（GSH）and oxidized glutathione（GSSG）.The mass ratio of GSH to GSSG was 4:*** purified enzyme was active,showing that at least part of the protein was properly *** protein was made concentrated byultrafiltration,and then isolated using Sephacryl S-200 *** were two protein peaks in the A280 *** on the results of electrophoresis,we concluded that the two fractions were formed by protein subunitsof the same mass,and in the fraction where the molecular weight was higher,the dimer was formed throughthe disulfide bond between *** were detected in the two fractions,but the activity of thedimer was much higher than that of the single *** special activities of the two fractions werefound to be 3475 U/mg protein and 510 U/mg protein,respectively.

关键词： refolding His6 tag recombinant EC-SOD inclusion body protein subunit structure

On edge dislocation in a multilayered laminate

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Theoretical & Applied Mechanics Letters 2011年第2期1卷 25-28页

作者： Xu Wang~(a) School of Mechanical and Power engineering,east china university of science and technology,shanghai 200237, china School of Mechanical and Power engineering East China University of Science and Technology Shanghai 200237 China

We investigate the elastic field induced by an edge dislocation in a multilayered laminated composite composed of(N—2)thin bonded elastic layers sandwiched between two semi-infinite elastic media.A simple closed-form solution is obtained when all the phases have equal shear modulus but different Poisson's ratios,and when the dislocation is located in the upper semi-infinite *** image force acting on the dislocation due to its interaction with the multilayered structure is also derived. Several specific examples are discussed in detail to illustrate the mobility of the edge dislocation. Some interesting behaviors of the dislocation are *** results indicate that it is possible to find at most(N—2)equilibrium positions for the edge dislocation in an N-phase composite structure.

关键词： laminated composite edge dislocation image force equilibrium position