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Numerical simulation of two-phase flow and droplet breakage of glycerin-water mixture and kerosene in the cyclone reactor

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Chinese Journal of Chemical Engineering 2021年第6期34卷 150-159页

作者： Yanni Chi Rui Zhang xianghai meng Jian Xu Wei Du Haiyan Liu Zhichang Liu State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China

A liquid-liquid cyclone reactor(LLCR)was designed to achieve mixing-reaction-separation integration during isobutane alkylation catalyzed by ionic ***,studies of the droplets deformation and breakage in the kind of reactors are *** this work,the research studied the velocity distribution,pressure field,and turbulent field to investigate the flow pattern and the main energy loss location in the LLCR through the computational fluid dynamics(CFD)*** simulation results were verified by experiemnts to prove the correctness of the *** the deformation and breakage process of droplets,and the influencing factors of droplets breakage were studied by remodeling which was based on the tangential velocity distribution result of the three dimensional *** three dimensional simulation results clearly showed that the pressure of the LLCR was mainly concentrated in the cone section and fluid turbulent motion was the most intense near the lateral *** reconstruct the results of the two dimensional model clearly showed that the deformation and breakage location of droplets were mainly occurred in the velocity boundary layer,while it was difficult to break in the mainstream *** addition,low surface tension and high Weber number had a positive effect on droplet breakage.

关键词： Liquid-liquid cyclone reactor Ionic liquid separation Droplet deformation Droplet breakage Computational fluid dynamics

Chloroaluminate ionic liquid catalyzed isomerization of n-pentane in the presence of product distribution improver

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Petroleum Science 2011年第2期8卷 219-223页

作者： Xia Rong＇an Zhang Rui meng xianghai Liu Zhichang meng Jiaying Xu Chunming State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

The ionic liquid Et3NHC1-2AIC13 can catalyze the isomerization of n-pentane. This paper investigates the ionic liquid catalyzed isomerization performance of n-pentane with several product distribution improvers in an autoclave. The product distribution of n-pentane isomerization could be improved by such improvers as benzene, cyelohexane, and methyl cyclohexane at the expense of conversion of n-pentane. The optimal product distribution improver was determined to be cyclohexane. The yield of isomerate and the selectivity of liquid isoalkanes increased, whereas the conversion of n-pentane decreased, with increasing cyclohexane amount. At the same conversion of n-pentane, the research octane number （RON） of liquid product, with cyclohexane amount of 0.5 wt%, was about 1.3 higher than that without cyclohexane. At the same reaction conditions, the presence of cyclohexane enhanced the yield of isomerate, the selectivity of liquid isoalkanes, and the RON of the liquid product, but reduced the conversion of n-pentane.

关键词： Isomerization ionic liquid improver pentane cyclohexane

Study on reformulation of fluid catalytic cracking gasoline and increasing production of light olefins

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Frontiers of Chemical Science and Engineering 2008年第1期2卷 74-79页

作者： Pingxiang YAN xianghai meng Jinsen GAO Chunming XU Zhiyu SUI State Key Laboratory of Heavyoil Processing China University of PetroleumBeijing 102249China

The effects of reaction temperature,mass ratio of catalystto oil,space velocity,andmass ratio of water to oil on the product distribution,the yields of light olefins(light olefins including ethylene,propylene and butylene)and the composition of the fluid catalytic cracking(FCC)gasoline upgraded over the self-made catalyst GL in a confined fluidized bed reactor were *** experimental results showed that FCC gasoline was obviously reformulated under appropriate reaction *** olefins(olefins with C atom number above 4)content of FCC gasoline was markedly reduced,and the aromaticscontent andoctanenumber were *** upgraded gasoline met the new standard of gasoline,and meanwhile,higher yields of light olefins were ***,higher reaction temperature,higher mass ratio of catalyst to oil,higher mass ratio of water to oil,and lower space velocity were found to be beneficial to FCC gasoline reformulation and light olefins production.

关键词： fluid catalytic cracking gasoline catalytic reformulation light olefins

High-efficiency separation and extraction of naphthenic acid from high acid oils using imidazolium carbonate ionic liquids

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Chinese Journal of Chemical Engineering 2022年第1期35卷 252-259页

作者： Fenghua Geng Rui Zhang Luo Wu Zheng Tang Han Liu Haiyan Liu Zhichang Liu Chunming Xu xianghai meng State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

N-alkyl imidazolium carbonate ionic liquids were employed to separate and recover naphthenic acid from model *** effects of the cationic and anionic structures of ionic liquids and operating conditions on the deacidification performance were *** deacidification performance of traditional organic solvents was also investigated for *** results indicated that the naphthenic acid could be completely removed from the model oil with a small mass ratio of ionic liquid to *** extracted naphthenic acid was regenerated with a recovery of up to 92%.In addition,imidazolium carbonate ionic liquids could be successfully regenerated and *** mechanism of interaction between imidazole ionic liquids and the naphthenic acid molecules were explained by Gauss calculation.

关键词： Extraction Ionic liquid Naphthenic acid Recovery Computational chemistry

Effects of N_2 Pressure on the Structural and Electrical Properties of TiN Films Deposited by Laser Molecular Beam Epitaxy

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 823-826页

作者：符跃春 Key Laboratory of New Processing Technology for Materials and Nonferrous Metal Ministry of EducationCollege of Materials Science and EngineeringGuangxi University

Titanium nitride （TiN） films were deposited on Si（100） substrates by laser molecular beam epitaxy（LMBE）,and their properties of structure and resistivity with varying N2 pressure were *** results showed that atomically flat TiN films with layer-by-layer growth mode were successfully grown on Si（100） substrates,and （200） was the preferred *** the increasing of N2 pressure,the N/Ti ratio gradually increased and the diffraction peak progressively shifted towards lower diffraction *** pressure of 0.1 Pa,stoichiometric TiN film was formed which exhibited the characteristic diffraction angle of （200） *** films showed high reflectance to infrared spectrum and the films with overstoichiometry and understoichiometry had a higher resistivity owing to the surface particles and lattice distortion,while the stoichiometric TiN film depicted the minimum resistivity,around 19 μΩ·cm.

关键词： titanium nitride laser molecular beam epitaxy structural property resistivity

农业面源污染治理:政策实践、面临挑战与多元主体合作共治

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云南民族大学学报（哲学社会科学版） 2022年第1期39卷 58-64页

作者：沈贵银孟祥海江苏省农业科学院农业经济与发展研究所江苏南京210014 淮阴师范学院经济与管理学院江苏淮安223001

党的十九大报告提出“构建政府、企业、社会和公众共同参与的环境治理体系”。农业面源污染具有双重公共物品属性,污染物来源具有多样性,治理过程复杂,参与治理主体多元,农业面源污染治理仍面临一系列挑战。需要探索构建技术与经济耦合... 详细信息

党的十九大报告提出“构建政府、企业、社会和公众共同参与的环境治理体系”。农业面源污染具有双重公共物品属性,污染物来源具有多样性,治理过程复杂,参与治理主体多元,农业面源污染治理仍面临一系列挑战。需要探索构建技术与经济耦合、政府与市场共同作用、各类主体之间合作共治的农业面源污染多元共管共治体系,需要加强农业面源污染治理技术创新与推广应用,要针对农业面源污染的特点、污染物性质以及不同治理环节设计全要素、全环节的政府支持政策,要进一步推进制度创新,完善农业面源污染治理市场机制。

关键词：农业面源污染多元主体合作共治

基于CPMs及LOSS的高速公路安全性评价

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中国安全科学学报 2016年第3期26卷 151-156页

作者：孟祥海覃薇哈尔滨工业大学交通科学与工程学院

为评价高速公路基本路段的交通安全状况,首先应用统计分布拟合及假设检验方法,分析京珠高速公路及粤赣高速公路基本路段上事故起数的统计分布特征,验证事故起数符合负二项(NB)分布;然后给出基于NB分布的路段划分方法,建立基于NB分布的... 详细信息

为评价高速公路基本路段的交通安全状况,首先应用统计分布拟合及假设检验方法,分析京珠高速公路及粤赣高速公路基本路段上事故起数的统计分布特征,验证事故起数符合负二项(NB)分布;然后给出基于NB分布的路段划分方法,建立基于NB分布的事故预测模型(CPMs),并提出基于CPMs的路段安全性评价方法。其次引入交通安全服务水平(LOSS)概念,提出一种基于LOSS的路段安全性评价方法。最后分别用基于CPMs及LOSS的路段安全性评价方法,对京珠高速公路及粤赣高速公路基本路段进行安全性评价。结果表明,基于CPMs的安全性评价方法更适用于山岭重丘区的高速公路,而基于LOSS的路段安全性评价方法更适用于平原区的高速公路。

关键词：交通安全高速公路事故预测模型(CPMs) 安全性评价假设检验负二项(NB)分布安全服务水平(LOSS)

Synthesis of Y_2O_3 phosphor by a hydrolysis and oxidation method

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Journal of Rare Earths 2015年第7期33卷 706-711页

作者：王晓旭胡业旻孟详海李瑛朱明原金红明 Laboratory for Microstructures School of Materials Science and Engineering Shanghai University Department of Mechanical Engineering Tangshan Polytechnic College

A novel and convenient hydrolysis and oxidation method was first used in preparation of carbon contained Y2O3 phosphor powders. The alloy was hydrolyzed in deionized water and the obtained Y（OH）3 powders were heat treated in air atmosphere. The final products - Y2O3 powders were micron clusters which were aggregated by hundreds of nanoparticles with the size of about 5 nm. The chemical composition, structural and morphological features of the samples were characterized by means of X-ray powder diffraction （XRD） analysis, transmission electron microscopy （TEM）, Fourier-transform infrared （FT-IR） spectra, X-ray photoelectron spectra （XPS） and carbon sulfur analyzer. The obtained powders showed good bluish-white photoluminescence （PL） emissions （ranging from 430 to 600 nm, peaking at 468 nm and 578 nm） under the xenon light excitation. The luminescent mechanism was ascribed to the carbon impurities in the Y2O3 host.

关键词： yttrium oxide hydrolysis and oxidation method phosphors optical properties rare earths

Ce对FH40船板钢轧态组织及拉伸性能的影响

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稀有金属材料与工程 2020年第12期49卷 4112-4120页

作者：孟祥海王哲王萌李孟星李运刚华北理工大学冶金与能源学院河北唐山063210 唐山工业职业技术学院河北唐山063299 河钢集团唐钢公司河北唐山063016

利用真空感应炉制备不同Ce含量的FH40实验钢,采用OM、SEM、TEM和EDS手段观察钢的轧态组织,并对其拉伸性能和断口形貌进行测试与分析,研究了Ce对FH40钢轧态组织以及拉伸性能的影响机制。结果表明,随着Ce含量从0增加到0.058%(质量分数,下... 详细信息

利用真空感应炉制备不同Ce含量的FH40实验钢,采用OM、SEM、TEM和EDS手段观察钢的轧态组织,并对其拉伸性能和断口形貌进行测试与分析,研究了Ce对FH40钢轧态组织以及拉伸性能的影响机制。结果表明,随着Ce含量从0增加到0.058%(质量分数,下同),钢的轧态组织得到细化,由多边形铁素体变为细小的等轴状铁素体,同时出现粒状贝氏体;含0.0273%Ce和0.058%Ce钢中分别产生了Ce-O-S+TiN和Ce-O-S复合夹杂物,并且分别诱发了4条和5条晶内针状铁表体(IAF)。含0.058%Ce实验钢的屈服强度、抗拉强度较基体钢分别提高了31、33 MPa。当Ce含量为0.0273%时实验钢的延伸率达到了22.8%。实验钢均表现为位错强化和第二相强化,基体钢中析出相主要是Nb-Ti的复合相,含0.058%Ce实验钢中主要是Nb-Ti-Ce的复合相,且更加弥散细小,位错密度更高;同时断口形貌更加均匀,韧窝由小而浅转变为大而深,使其在切应力的作用下更不易断裂,因而提高了钢材的抗拉强度。

关键词： FH40钢轧态组织 Ce含量针状铁素体第二相强化