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Wavy Film Flow Along Periodic Wall Under Monochromatic-Frequency Flowrate Perturbation

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Transactions of tianjin University 2011年第4期17卷 305-312页

作者：许松林高永川 School of chemical Engineering and Technology Tianjin University

Surface wave dynamics of falling film on the surface of periodic rectangular wall under monochromatic-frequency flowrate forcing disturbances is studied via numerical simulation. Waveforms formed on the periodic rectangular wall are different from those on the flat plate. At low frequency, the perturbation introduced at the inlet first undergoes a steady flow region and then develops into solitary waves. When the frequency becomes higher, solitary waves disappear. Film deformations in the steady flow region and characteristics of solitary waves are studied as the film travels down. There are circulations at the depression of periodic wall which are dependent on the local film characteristics and geometry of the corrugation. Moreover, the flow rate and geometry of the corrugations can also affect the evolvement of the monochromatic perturbation.

关键词： periodic rectangular wall circulation flow solitary wave disturbance frequency film flow

Electrodeposition and Characterization of Polyaniline Film

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chemical Research in Chinese Universities 2012年第1期28卷 133-136页

作者： WANG Hong-zhi, ZHANG Peng, ZHANG Wei-guo and YAO Su-wei Shanshan Research Office of Surface Technology, College of chemical Engineering, tianjin University, tianjin 300072. P. R. china Shanshan Research Office of Surface Technology College of Chemical Engineering Tianjin University Tianjin 300072

Abstract Polyaniline film was prepared by electrochemical method in an acidic solution of aniline. The micromor- phology of the polyaniline film was transformed to three-dimensional network structure instead of little particles while the deposition time was extended. The peak wavelength of the photoluminescence spectrum was 491 nm. The luminous intensity increased with the extension of deposition time, and so did the electrochemical activity.

关键词： Polyaniline Electrodeposition Photoluminescence Electrochemical activity

EXPLOSIVE HARDENING OF HIGH Mn STEEL

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Acta Metallurgica Sinica(English Letters) 1991年第9期4卷 164-167页

作者： LI Mingshan ZHAO Shida Institute of Mechanics,Academia Sinica,Beijing,chinaSHI Guoshun Beijing centre of {2. and chemical Analysis,Beijing,china Acad Sinica Beijing China

The explosive hardening of high Mn Steel was simulated by using light gas gun under selected ranges of impact load from 10 to 2. GPa and pulse duration from 0.04 to 1.6μ*** experi- mental results showed that a lot of... 详细信息

关键词： high Mn steel explosive hardening twin dislocation

Analysis of Data on Xanthan Fermentation in Stationary Phase Using Black Box and Metabolic Network Models

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Chinese Journal of chemical Engineering 1999年第4期7卷 321-325页

作者：马红武赵学明唐寅杰天津大学化工学院天津 300072 天津大学化工学院天津

The xanthan fermentation data in the stationary phase was analyzed using the black box and the metabolic network models. The data consistency is checked through the elemental balance in the black box model. In the metabolic network model, the metabolic flux distribution in the cell is calculated using the metabolic flux analysis method, then the maintenance coefficients is calculated.

关键词： xanthan fermentation black box model metabolic flux analysis maintenance coefficients

Preparation of Immobilized ε-Polylysine PET Nonwoven Fabrics and Antibacterial Activity Evaluation

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Journal of Wuhan University of Technology(Materials Science) 2011年第4期26卷 675-680页

作者：郝丽梅杨荆泉 Institute of Medical Equipment the Academy of Military Medical Sciences National Bioprotection Engineering Center

A novel antibacterial material （L-PET） was prepared by immobilizing ε-polylysine on polyethylene terephthalate （PET） nonwoven fabrics. Surface modifications of the fabric were performed by using a chemical modification procedure where carboxyl groups were prepared on the PET surface, a coupling agent was grafted, and the ε-polylysine was immobilized. Scanning electron microscopy （SEM） was used to analyze the surface morphology of the fabrics, while the toluidine blue method and X-ray photoelectron spectroscopy （XPS） were used to evaluate the grafting densities. The antibacterial activities of the L-PET were investigated by using the shaking-flask method. The electron micrographs showed that the surface of the blank PET and the modified fabrics did not change. The results of XPS analysis confirmed that ε-polylysine was successfully grafted onto the surface of PET. The results of the antibacterial experiments showed that L-PET fabrics had excellent antibacterial activity against Escherichia coli and Staphylococcus aureus, and that L-PET fabrics were stable in storage for at least two years.

关键词： PET nonwoven fabric ε-polylysine immobilization antibacterial activity antibacterial material

A simulation of citrus oil adsorption separation in the supercritical carbon dioxide

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化工进展 2011年第S2期30卷 36-40页

作者： HU Zhihui,ZHANG Donghui,WANG Jixiao (chemical Engineering Research Center,State key laboratory of chemical engineering,School of chemical Engineering and Technology,tianjin University,tianjin 300072.china)

Aspen Adsim was used to simulate the fractionation of citrus oil with extraction and adsorption combined method in supercritical carbon *** dynamic behavior in a isothemal and adiabatic bed could be described succesfully,and the simulation results agreed with the experimental *** effect of adsorption time,the flow rate of feed on the concentration of components in product and the recovery were *** amount of loading composition on the adsorbents changed with adsorption time and axial distance of bed was also investigated.

关键词： Supercritical fluid adsorption carbon dioxide citrus oil Aspen Adsim

Modeling and Optimization of Catalytic Dehydration of Ethanol to Ethylene Using Central Composite Design

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Transactions of tianjin University 2009年第5期15卷 366-370页

作者：孔海宁齐二石李钢何曙光张宪 School of Management Tianjin University School of chemical Engineering and Technology Tianjin University

The central composite design in the modeling and optimization of catalytic dehydration of ethanol to ethylene was performed to improve the ethylene yield.A total of 2. experiments at random were conducted to investigate the effect of reaction temperature,Si/Al ratios of H-ZSM-5 catalyst and liquid hourly space velocity(LHSV) on the ethylene *** results show that the relationship between ethylene yield and the three significant independent variables can be approximated by a nonlinear polynomial model,with R-squared of 99.9%and adjusted R-squared of 99.8%.The maximal response for ethylene yield is 93.4%under the optimal condition of 32. ℃,Si/Al ratio 85,and LHSV 3.8 h-1.

关键词： central composite design catalytic dehydration of ethanol ethylene yield modeling optimization

Mechanisms of Cenozoic deformation in the Bohai Basin, Northeast china: physical modelling and discussions

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Science china Earth Sciences 2006年第3期49卷 258-271页

作者： ZHOU Jianxun1 & ZHOU Jiansheng2.1. Key Laboratory for Hydrocarbon Accumulation of Chinese Ministry of Education and Department of Earth Science, china University of Petroleum, Beijing 102.49, china 2. Dagang Petroleum Sub-corporation of Petro{2. Company Limited, tianjin 3002.0, china Key Laboratory for Hydrocarbon Accumulation of Chinese Ministry of Education and Department of Earth Science China University of Petroleum Beijing China Dagang Petroleum Sub-corporation of Petrochina Company Limited Tianjin China

The Bohai Basin is a Cenozoic petroliferous extensional basin in china and has apparent geometrical and kinematic similarities with the other Meso-Cenozoic extensional basins located along the eastern margin of Eurasian Plate. However, the deformation mechanisms of the basin are still in dispute. Physcial modelling referring to the Huanghua Depression, located in the central part of the Bohai Basin was conducted employing four sets of planar sandbox experimental models with different extension directions. Only experimental results of the model with N-S extension show good structural similarity with the depression. The results also indicate that complex variations of fault strike in a rift basin are not necessarily the results of complex kinematic mechanisms or polyphase deformation. Based on comparison of experimental results with the actual structures and the good structural simi- larity between Huanghua Depression and the whole Bohai Basin, it is concluded that the Bohai Basin was formed by the N-S extension. The strike slip deformation along the NNE-trending border faults of the basin resulted from the N-S extension and played the role of lateral transformation for the N-S extension. In addition, according to the apparent geometrical and kinematic similarities among the Bohai Basin and other Meso-Cenozoic extensional basins located along the eastern margin of the Eurasian Plate, it is proposed that: (1) this “N-S extension” model provides a better kinematic inter- pretation for the formation of Bohai Basin and the other adjacent basins located along the eastern margin of the Eurasian Plate; and (2. the N-S extension was probably the effect of the “slab window” formed by the subduction of the nearly E-W trending oceanic ridge between the Kula and Pacific Plates. The “slab window” effect can also provide reasonable explanations for the phenomena that initial rifting ages of basins become progressively younger westwards along the eastern margin of the Eurasian Plate

关键词： Bohai Basin, physical modelling, Cenozoic, extensional tectonics.

A NEW METHOD FOR PBEPARATION OF IBON(Ⅲ) PORPHYRIN OXYANION OMPLEXES -SYNTHESIS OF PERCHLORATE(PORPHYINATO) IRON(Ⅲ)

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Chinese chemical Letters 1996年第2期7卷 187-188页

作者： Xin Hua ZHONG Yao Yu FENG Jie Sheng HUANG and Pan Wen SHEN(Departemt ot Chemistry. Nankai University, tianjin 300071)(Institute of chemical Engineering,tianjin University, tianjin 300072. Department of Chemistry Nankai University Tianjin 300071 Institute of chemical Engineering Tianjin University Tianjin 300072

A new method for preparetion of iron(III) porphyrin oxyanion complexes was reported. By this method perchiorate complex of iron(III) tetraphenylporphyrin [FeTPP(OClO3)] was prepared from i-butylamine complex of iron(I...

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