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Particuology 2024年第8期91卷 38-49页

作者： Zeman He Shaofu Du Guanying Shao Peiyu Li Lei Sheng Gaohong He xiaobin jiang Wu Xiao State Key Laboratory of Fine Chemicals School of Chemical EngineeringEngineering Laboratory for Petrochemical Energy-efficient Separation Technology of Liaoning ProvinceDalian University of TechnologyDalian 116024China

Cooling crystallization is an important separation process and particuology technology that requires accurate nucleation control ***,we introduced the polymeric hollow fiber membrane with proper thermal properties as the effective nucleation induction interface during cooling *** heterogeneous nucleation control mechanism was introduced based on classical nucleation theory and the thermal transfer *** properties and the thermal conductivity of two kinds of polymeric membranes,polytetrafluoroethylene(PTFE)and polyethersulfone(PES),were measured and simulated with the developed *** two membranes possessed different nucleation induction periods,nucleation rates and crystallization performances,which validated that the hollow fiber membrane module could effectively accelerate the nucleation process compared to conventional cooling crystallization owing to the shorter nucleation induction period and the reduced solution surface *** to the higher hydrophobicity and the lower roughness of the membrane surface,the PTFE membrane possessed a more moderate performance in generating stable heterogeneous nucleation than the one of PES ***,the adjustable membrane property enabled the hollow fiber membrane-assisted cooling crystallization to possess the accurate nucleation control and desired terminal particle products.

关键词： Cooling crystallization Nucleation Particle process Hollow fiber membrane Induction period Process control

Supersaturation-driven self-assembly formation of ceftriaxone sodium spherulites:From amorphous form to spherulites

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Particuology 2024年第7期90卷 10-19页

作者： Shankun Liang Yuchao Niu Xueyan Hu Wu Xiao Xuehua Ruan Gaohong He xiaobin jiang State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian116024China School of Chemical Engineering at Panjin Dalian University of TechnologyPanjin124221China

Drug particles with spherical morphology possess amazing advantages in terms of particle flowability,mechanical properties,drug solubility,and *** growth mechanism of drug spherulite is of great importance for the preparation and regulation of ***,ceftriaxone sodium spherulites were fabricated by the antisolvent crystallization method using dropwise addition of ceftriaxone sodium solution to *** observation of the whole crystallization process combined with electron microscopy technique revealed the spherical growth process from amorphous form to *** the supersaturation of the crystallization system was adjusted,the ceftriaxone sodium crystals transformed from amorphous form to *** the process of antisolvent crystallization with acetone as antisolvent,when the theoretical supersaturation degree S was higher than 2.62,the crystallization system tended to appear amorphous form;when S was between 2.57 and 2.62,the amorphous form transformed into clustered spherulites;when S was less than 2.57,the surface of spherulites will be covered with flaky crystal,which transformed into urchin-like *** the understanding of the spherical growth mechanism,the ceftriaxone sodium spherulites prepared in this research with modified supersaturation control had a low residue of antisolvent acetone,and the flowability was significantly improved.

关键词： Spherulite Ceftriaxone sodium Antisolvent crystallization Supersaturation Online observation

膜调控的头孢呋辛钠溶析-冷却耦合结晶成核介稳区测定及分析

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化工进展 2024年第1期43卷 260-268页

作者：张梁马骥贺高红姜晓滨肖武大连理工大学化工学院精细化工国家重点实验室辽宁省石化行业高效节能分离技术工程实验室辽宁大连116024

溶析-冷却耦合结晶可以提高结晶产率的同时,降低溶析剂的消耗量,是一种高效的耦合分离过程。传统的溶析结晶传质的界面往往受到宏观混合规模的限制,传质调控通常为亚毫米级,容易爆发成核,导致结晶产品的纯度差、平均粒度小、晶体粒度分... 详细信息

溶析-冷却耦合结晶可以提高结晶产率的同时,降低溶析剂的消耗量,是一种高效的耦合分离过程。传统的溶析结晶传质的界面往往受到宏观混合规模的限制,传质调控通常为亚毫米级,容易爆发成核,导致结晶产品的纯度差、平均粒度小、晶体粒度分布宽,因而需要更精确的调节策略。本文提出了一种新型的膜辅助溶析-冷却耦合结晶的方法,应用于头孢呋辛钠的结晶过程研究。其中,聚四氟乙烯(PTFE)中空纤维膜作为精确添加溶析剂和高效混合的界面,实现过饱和度的均匀分布。为了对比膜辅助溶析-冷却耦合结晶和传统耦合结晶方式的调控效果,对膜辅助溶析-冷却耦合结晶过程进行更为精确的调控,分别测量了传统和膜辅助条件下溶析-冷却耦合结晶的头孢呋辛钠-水-乙醇体系的介稳区宽度,计算了成核动力学参数。使用响应面方法和理论模型分析了冷却速率、溶析剂添加速率和溶析剂组分对介稳区宽度的影响,并比较了传统结晶和膜辅助结晶的介稳区特征。结果表明,膜辅助溶析-冷却耦合结晶的成核级数和成核速率常数(n=2.07,kn=158.15)均小于常规耦合结晶(n=2.45,kn=493.22),成核动力学方面更加温和,可调控性更强。

关键词：膜辅助结晶介稳区溶析-冷却耦合结晶过程强化响应面方法

电辅助磺化聚砜膜分离医药废水传递机理的分子动力学模拟研究

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化学工业与工程 2024年第2期41卷 94-104页

作者：齐智博贺高红姜晓滨大连理工大学化工学院辽宁大连116024 辽宁省石化行业高效节能分离技术工程实验室辽宁大连116024

医药生产废水的膜法分离技术对实现绿色医药化工意义重大。其中,通过电场辅助强化膜分离效率,阻止荷电医药分子迁移、离子跨膜传递,有较好的应用前景。但目前尚无分子尺度模型揭示相关膜界面和膜传递通道内的分离机制,也制约了相关新型... 详细信息

医药生产废水的膜法分离技术对实现绿色医药化工意义重大。其中,通过电场辅助强化膜分离效率,阻止荷电医药分子迁移、离子跨膜传递,有较好的应用前景。但目前尚无分子尺度模型揭示相关膜界面和膜传递通道内的分离机制,也制约了相关新型膜材料设计和膜技术研发。利用分子动力学模拟(MD)技术,从分子层面上探究电场辅助下的磺化聚砜膜(SPSf)分离头孢呋辛钠医药废水的机理,并模拟膜内含水量对离子传递行为的影响。模拟过程中能量、温度波动低于10%,证明模型设定与计算方法可靠;所构建模型玻璃化转变温度与实验值接近,证明所选力场合适,所得数据可用于后处理及结果分析。结果表明,外加电场增强膜表面带电基团对同性离子的排斥能力。随着电场在一定程度上的增强(0~0.15 V·Å^(-1)),解离后的荷电膜对带负电粒子排斥能力增强(SPSf解离后,膜表面头孢呋辛离子强度下降15.7%),对Na+吸附更强(Na+强度增加19.4%),证明电增强Donnan效应与电增强吸附/脱附是电辅助荷电纳滤膜分离医药废水的主要作用机理。此外,分析了电场强度与膜内含水量对离子在SPSf膜体系中扩散的影响。在模拟实验范围内,随着含水量与电场强度增大,荷电膜内离子扩散能力增强;在膜内含水量λ=2.0、0.10 V·Å^(-1)时,Na+扩散系数与头孢呋辛离子扩散系数相差1.54×10^(-6)cm^(2)·s^(-1),在这种条件下离子选择性最高。通过分子动力学模拟技术(MD)从微观层面解释电辅助荷电膜分离医药工业废水的调控机理,为理性设计和选择荷电膜材料与膜表面的基团改性提供了有益的理论参考。

关键词：膜分离分子动力学模拟电场强化医药废水 Donnan效应

固定污染源挥发性有机物在线监测系统运维及质控问题分析

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皮革制作与环保科技 2024年第15期5卷 135-137页

作者：蒋晓斌苏州市常熟环境监测站江苏常熟215500

随着工业化的快速发展,环境污染问题日益严重,其中固定污染源排放的挥发性有机物(VOCs)对大气环境和人类健康造成了严重威胁。为了有效控制VOCs的排放,我国相继出台了一系列政策和标准,并加大了对固定污染源VOCs的监测和治理力度。在线... 详细信息

随着工业化的快速发展,环境污染问题日益严重,其中固定污染源排放的挥发性有机物(VOCs)对大气环境和人类健康造成了严重威胁。为了有效控制VOCs的排放,我国相继出台了一系列政策和标准,并加大了对固定污染源VOCs的监测和治理力度。在线监测系统作为一种实时、高效的环境监测手段,在固定污染源VOCs的监测中发挥着越来越重要的作用。因此,探讨固定污染源挥发性有机物在线监测系统的运维及质控问题具有重要的现实意义。

关键词：固定污染源挥发性有机物在线监测系统运维质控

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三维虚拟船舶系泊操纵评估系统

中国安全科学学报 2024年第5期34卷 147-154页

作者：蒋效彬金春燕任鸿翔张志恒上海海事大学商船学院上海201306 宁波大学海运学院浙江宁波315211 大连海事大学航海学院辽宁大连116026

为保障船舶驾驶操纵过程中的航行安全,准确评估船员的实操技能,针对目前船舶系泊操纵评估缺乏完整评价指标体系的问题,结合专家评估法和模糊综合评价法进行系泊操纵技能评估,构建每个评价指标的隶属度函数;采用层次分析法(AHP)确定每个... 详细信息

为保障船舶驾驶操纵过程中的航行安全,准确评估船员的实操技能,针对目前船舶系泊操纵评估缺乏完整评价指标体系的问题,结合专家评估法和模糊综合评价法进行系泊操纵技能评估,构建每个评价指标的隶属度函数;采用层次分析法(AHP)确定每个评价指标的建议权重值和标准值,以确保评价结果准确可靠;利用三维虚拟船技术,根据各因素对系泊操纵的影响程度研发一套系泊操纵技能自动评估系统,实现对船舶系泊操作的全面评估。研究结果表明:该系统评估结果与专家评估结果相比,有较高的一致性,证明模型在评估船员系泊操纵技能方面的有效性和可靠性。

关键词：三维虚拟船舶系泊操纵评估系统隶属度函数模糊综合评价法

Simulation of anchor chain based on lumped mass method

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Theoretical & Applied Mechanics Letters 2023年第4期13卷 311-319页

作者： xiaobin jiang Jian Gan Shiyang Teng Merchant Marine College Shanghai Maritime UniversityShanghai 201306China

In order to develop a anchoring operation simulation system and improve safety during anchoring operations,a relatively accurate mathematical model of anchoring operations needs to be *** this paper,the stress condition of anchor chain under environmental and subsea geological conditions is further studied and the stress condition of anchor chain is analyzed based on the previous *** this paper,a quasi-static model based on catenary method is used as the basis of dynamic analysis,and the dynamic model of anchor chain is established based on the concentrated mass method,which fully considers the influence of anchor chain weight,hydrodynamic force,ocean current and interaction with the *** fourth-order Runge Kutta method was used to solve the model numerically,and a calculation procedure was *** accuracy of the model was verified by comparing the calculated results with the experimental results,indicating that the constructed anchor chain dynamics model has a high accuracy.

关键词： Lump mass method Anchor chain Dynamic analysis

Application of membrane separation technology in postcombustion carbon dioxide capture process

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Frontiers of Chemical Science and Engineering 2014年第2期8卷 233-239页

作者： Mo LI xiaobin jiang Gaohong HE State Key Laboratory of Fine Chemicals R&D Center of Membrane Science and Technology School of Chemical Engineering Dalian University of Technology Dalian 116024 China

Membrane separation technology is a possible breakthrough in post-combustion carbon dioxide capture process. This review first focuses on the requirements for C02 separation membrane, and then outlines the existing competitive materials, promising preparation methods and processes to achieve desirable CO2 selectivity and permeability. A particular emphasis is addressed on polyimides, poly （ethylene oxide）, mixed-matrix mem- brane, thermally-rearranged polymer, fixed site carrier membrane, ionic liquid membrane and electrodialysis process. The advantages and drawbacks of each of materials and methods are discussed. Research threads and methodology of CO2 separation membrane and the key issue in this area are concluded

关键词： membranes carbon dioxide capture separa-tion polymers post-combustion

Pressure swing adsorption/membrane hybrid processes for hydrogen purification with a high recovery

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Frontiers of Chemical Science and Engineering 2016年第2期10卷 255-264页

作者： Baojun Li Gaohong He xiaobin jiang Yan Dai Xuehua Ruan State Key Laboratory of Fine Chemicals R&D Center of Membrane Science and Technology School of Chemical Engineering Dalian University of Technology Dalian 116012 China

Hydrogen was recovered and purified from coal gasification-produced syngas using two kinds of hybrid processes： a pressure swing adsorption （PSA）- membrane system （a PSA unit followed by a membrane separation unit） and a membrane-PSA system （a mem- brane separation unit followed by a PSA unit）. The PSA operational parameters were adjusted to control the product purity and the membrane operational parameters were adjusted to control the hydrogen recovery so that both a pure hydrogen product （〉 99.9%） and a high recovery （〉 90%） were obtained simultaneously. The hybrid hydrogen purification processes were simulated using HYSYS and the processes were evaluated in terms of hydrogen product purity and hydrogen recovery. For comparison, a PSA process and a membrane separation process were also used individually for hydrogen purifica- tion. Neither process alone produced high purity hydrogen with a high recovery. The PSA-membrane hybrid process produced hydrogen that was 99.98% pure with a recovery of 91.71%, whereas the membrane-PSA hybrid process produced hydrogen that was 99.99% pure with a recovery of 91.71%. The PSA-membrane hybrid process achieved higher total H2 recoveries than the membrane-PSA hybrid process under the same H2 recovery of membrane separation unit. Meanwhile, the membrane-PSA hybrid process achieved a higher total H2 recovery （97.06%） than PSA-membrane hybrid process （94.35%） at the same H2 concentration of PSA feed gas （62.57%）.

关键词： hydrogen purification PSA membrane separation hybrid process

Membrane Crystallization for Process Intensification and Control:A Review

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Engineering 2021年第1期7卷 50-62页

作者： xiaobin jiang Yushan Shao Lei Sheng Peiyu Li Gaohong He State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China

Crystallization is a fundamental separation technology used for the production of particulate *** nucleation and growth process control are vitally important but difficult.A novel controlling technology that can simultaneously intensify the overall crystallization process remains a significant *** crystallization(MCr),which has progressed significantly in recent years,is a hybrid technology platform with great potential to address this *** review illustrates the basic concepts of MCr and its promising applications for crystallization control and process intensification,including a state-of-the-art review of key MCr-utilized membrane materials,process control mechanisms,and optimization strategies based on diverse hybrid membranes and crystallization ***,efforts to promote MCr technology to industrial use,unexplored issues,and open questions to be addressed are outlined.

关键词： Membrane crystallization Nucleation Process control Process intensification