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学者姓名：尹鹏博
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Abstract ：
当液氨管道处于事故泄漏、停输超压或计划维护等情况时,可采用泄放的方式对管内液氨进行泄压回收.由于氨的高体积膨胀性,其泄放过程的节流效应会导致管内温度骤降,加剧管道受冷收缩和脆性断裂的风险.针对目前液氨管道泄放特性研究不足,参考国内外相关设计和运行参数,建立液氨管道泄放仿真模型,探讨管长、管径和操作条件(温度、压力)影响下的泄放特征参数发展规律.研究结果表明:随着管道长度减小,泄放初期管内压降和温降增大,泄放过程压力和温度随时间下降幅度增加;随着管径减小,泄放口初始压力和温度下降幅度增大,泄放时间和泄放最低温度减小;管道运行压力对整体泄放过程影响较小;管道运行温度越低,泄放口初始温降越大,泄放所需时间越长.研究成果将为液氨管道紧急泄放的安全控制和应急方案的制定提供重要依据.
Keyword ：
仿真模拟 仿真模拟 影响因素 影响因素 泄放 泄放 液氨管道 液氨管道 特征参数 特征参数
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| GB/T 7714 | 尹鹏博 , 林涌滨 , 滕霖 et al. 液氨管道泄放特性及影响因素研究 [J]. | 化学工程 , 2025 , 53 (2) : 78-83 . |
| MLA | 尹鹏博 et al. "液氨管道泄放特性及影响因素研究" . | 化学工程 53 . 2 (2025) : 78-83 . |
| APA | 尹鹏博 , 林涌滨 , 滕霖 , 李卫东 , 黄鑫 , 李臻超 et al. 液氨管道泄放特性及影响因素研究 . | 化学工程 , 2025 , 53 (2) , 78-83 . |
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氨作为高效的储氢载体,具有替代化石燃料能源的巨大潜力.利用成品油管道增输液氨,可充分利用管道运能,节约输送成本.液氨-成品油混合体系的相平衡问题对于管输工艺具有重要意义,此外减压过程会引起更为复杂的相变问题.针对液氨-成品油混合体系进行实验研究,初步阐述了氨/油(体积比)和含水率对液氨-成品油混合体系相平衡和减压相变的影响规律,得到了液氨-成品油混合体系的相平衡压力,揭示了液氨-成品油混合体系减压过程的相变现象.研究发现,在0～30℃,氨-油混合体系的平衡蒸气压小于两种纯组分的饱和蒸气压,而在-2～0℃大于纯液氨的饱和蒸气压,并在氨/油(体积比)为70∶30时达到最大值.同时水分的存在会降低氨-油混合体系的平衡蒸气压.氨-油无水混合体系在减压过程中会产生气泡,压力越低气泡增多,发泡行为越剧烈.含水液氨-成品油混合体系在减压过程中会产生液滴群,并慢慢变大且聚并,在减压结束后聚并形成大液滴留在底部.上述研究成果对成品油管道增输液氨技术发展和应用具有重要的理论指导意义.
Keyword ：
成品油 成品油 液氨 液氨 相变 相变 相平衡 相平衡
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| GB/T 7714 | 黄鑫 , 李逸龙 , 李卫东 et al. 液氨-成品油混合体系相平衡及减压相变规律研究 [J]. | 化工学报 , 2025 , 76 (1) : 71-80 . |
| MLA | 黄鑫 et al. "液氨-成品油混合体系相平衡及减压相变规律研究" . | 化工学报 76 . 1 (2025) : 71-80 . |
| APA | 黄鑫 , 李逸龙 , 李卫东 , 施鸿翔 , 尹鹏博 , 李臻超 et al. 液氨-成品油混合体系相平衡及减压相变规律研究 . | 化工学报 , 2025 , 76 (1) , 71-80 . |
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Ammonia, as an efficient hydrogen storage carrier, has great potential to replace fossil fuel energy. The use of refined oil pipelines to increase the infusion of liquid ammonia can make full use of the pipeline capacity and save transportation costs. The phase equilibrium problem of the liquid ammonia-refined oil blend system is of great significance to the pipeline transportation process, and the decompression process will cause more complex phase change problems. In this paper, the effects of ammonia/oil ratio and moisture content on the phase equilibrium and decompression phase change of the liquid ammonia-refined oil mixed system were clarified, the phase equilibrium pressure of the liquid ammonia-refined oil mixed system was obtained, and the phase change mechanism of the liquid ammonia-refined oil mixed system was revealed. It is found that the equilibrium vapor pressure of the ammonia-oil mixed system is less than the saturation vapor pressure of the two pure components in 0—30℃, and is greater than the saturation vapor pressure of pure liquid ammonia in −2—0℃, and reaches the maximum value when the oil volume ratio is 0.3. At the same time, the presence of moisture reduces the equilibrium vapor pressure of the ammonia-oil mixture. The ammonia-oil anhydrous mixed system will produce bubbles during the decompression process. The lower the pressure, the more bubbles there are, and the more intense the foaming behavior. The aqueous liquid ammonia-oil mixing system generates droplet clusters during decompression, which slowly become larger and aggregate, and form large droplets that remain at the bottom at the end of decompression. The above research results have important theoretical guiding significance for the development and application of ammonia infusion technology in refined oil pipelines. © 2025 Materials China. All rights reserved.
Keyword ：
liquid ammonia liquid ammonia phase equilibrium phase equilibrium phase transition phase transition refined oil refined oil
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| GB/T 7714 | Huang, X. , Li, Y. , Li, W. et al. Research on the phase equilibrium and depressurization phase transition characteristics of liquid ammonia-refined oil mixed system; [液氨-成品油混合体系相平衡及减压相变规律研究] [J]. | CIESC Journal , 2025 , 76 (1) : 71-80 . |
| MLA | Huang, X. et al. "Research on the phase equilibrium and depressurization phase transition characteristics of liquid ammonia-refined oil mixed system; [液氨-成品油混合体系相平衡及减压相变规律研究]" . | CIESC Journal 76 . 1 (2025) : 71-80 . |
| APA | Huang, X. , Li, Y. , Li, W. , Shi, H. , Yin, P. , Li, Z. et al. Research on the phase equilibrium and depressurization phase transition characteristics of liquid ammonia-refined oil mixed system; [液氨-成品油混合体系相平衡及减压相变规律研究] . | CIESC Journal , 2025 , 76 (1) , 71-80 . |
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Wax deposition of diesel oil and contamination of gasoline by diesel wax deposit is a severe problem in sequential transportation of product oil in pipes. However, it has long been neglected by the pipeline transportation industry. In response, this work aims to present a unique perspective on wax deposition of diesel oil and consequent contamination of gasoline. A cold finger apparatus was designed and constructed. Model oil composed of diesel and refined wax was prepared for wax deposition. Shear dispersion was excluded for wax deposition of diesel oil. Moreover, dissolution experiments of diesel wax deposit in gasoline were conducted. It was found that the dissolution rate increases with oil temperature and decreases with cold finger temperature and shear stress. Analysis on gasoline quality after diesel wax deposit dissolution indicated that contamination of gasoline caused by diesel wax deposit severely deteriorates its distillation range, but the octane number remains acceptable. This work features an interesting investigation on the wax-deposition mechanism of diesel oil, dissolution characteristics of diesel wax deposit, as well as quality deterioration of subsequent gasoline. It would be helpful in scheduling a product oil-transportation program. © 2024 by the authors.
Keyword ：
contamination of gasoline contamination of gasoline distillation range distillation range octane number octane number product oil pipeline product oil pipeline wax deposition of diesel wax deposition of diesel
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| GB/T 7714 | Li, W. , Xie, L. , Du, S. et al. Wax Deposition of Diesel Oil and Consequent Contamination of Gasoline in Sequential Transportation of Product Oil Pipeline [J]. | Energies , 2024 , 17 (17) . |
| MLA | Li, W. et al. "Wax Deposition of Diesel Oil and Consequent Contamination of Gasoline in Sequential Transportation of Product Oil Pipeline" . | Energies 17 . 17 (2024) . |
| APA | Li, W. , Xie, L. , Du, S. , Zhang, H. , Mo, J. , Wei, S. et al. Wax Deposition of Diesel Oil and Consequent Contamination of Gasoline in Sequential Transportation of Product Oil Pipeline . | Energies , 2024 , 17 (17) . |
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Understanding the interactions between hydrogen and material integrity in polycrystalline α-Fe is essential for advancing the reliability of critical infrastructure and energy systems. In this study, molecular dynamics simulations were implemented to pinpoint the crack propagation behaviour and mechanism in polycrystalline α-Fe under various hydrogen concentrations and temperatures. The results show that a phase transition from body-centred cubic to face-centred cubic structure first occurs at the crack tip, followed by grain boundary-mediated plasticity activities at room temperature devoid of hydrogen. A limited amount of hydrogen atoms (H/Fe atomic ratio<1%) induces twinning emission from the tip, and increasing temperature further enhances dislocation plasticity as a consequence of decreased unstable stacking fault energy, thereby leading to the blunting of the crack tip. At high hydrogen concentrations (H/Fe atomic ratio>1%), the formed hydrides ahead of the crack tip suppress the phase transition, and concurrently temperature-enhanced dislocation plasticity disappears. As a consequence, the crack propagation proceeds via grain boundary cavity nucleation and growth, and ultimately evolves into intergranular fracture. These findings provide an atomistic-level explanation for temperature-dependent hydrogen-crack interaction mechanisms, and reveal a transition in the fracture mode from ductile transgranular to intergranular failure associated with locally high hydrogen concentrations found in the experiments. © 2024 The Authors
Keyword ：
Cavity nucleation Cavity nucleation Crack propagation Crack propagation Hydrogen embrittlement Hydrogen embrittlement Intergranular fracture Intergranular fracture Phase transition Phase transition
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| GB/T 7714 | Li, J. , Wu, Z. , Yin, P. et al. Temperature-dependent hydrogen-induced crack propagation behaviour and mechanism in polycrystalline α-iron: Insights from molecular dynamics simulations [J]. | International Journal of Hydrogen Energy , 2024 , 85 : 500-510 . |
| MLA | Li, J. et al. "Temperature-dependent hydrogen-induced crack propagation behaviour and mechanism in polycrystalline α-iron: Insights from molecular dynamics simulations" . | International Journal of Hydrogen Energy 85 (2024) : 500-510 . |
| APA | Li, J. , Wu, Z. , Yin, P. , Teng, L. , Zhang, C. , Deng, G. et al. Temperature-dependent hydrogen-induced crack propagation behaviour and mechanism in polycrystalline α-iron: Insights from molecular dynamics simulations . | International Journal of Hydrogen Energy , 2024 , 85 , 500-510 . |
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采用成品油管道顺序输送甲醇不仅可以拓展甲醇运输方式、降低运输成本，还能够提升管道运力、缓解现有成品油管道低输量难题，但目前成品油管道顺序输送甲醇工艺相关研究鲜有报道，技术的推广和应用受限。针对顺序输送过程中的混油问题，结合ALE(Arbitrary LagrangianEulerian)方法、流体控制方程以及物质传递方程，建立了甲醇和汽油顺序输送混油模型，分析了输送次序和管道流速对甲醇和汽油顺序输送过程中混油长度和混油浓度演化的影响规律。研究表明，该模型模拟的混油长度略短于VOF（流体体积）方法，在实际顺序输送过程中选择甲醇前行汽油后行的输送次序，能够有效缩短混油长度。研究结论可为成品油管道顺序输送甲醇工艺提供理论指导。
Keyword ：
ALE方法 ALE方法 数值模拟 数值模拟 混油扩散 混油扩散 甲醇输送 甲醇输送
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| GB/T 7714 | 黄鑫 , 施鸿翔 , 王良旭 et al. 水平管道中甲醇和汽油顺序输送过程混油规律研究 [J]. | 油气与新能源 , 2024 , 36 (04) : 57-66 . |
| MLA | 黄鑫 et al. "水平管道中甲醇和汽油顺序输送过程混油规律研究" . | 油气与新能源 36 . 04 (2024) : 57-66 . |
| APA | 黄鑫 , 施鸿翔 , 王良旭 , 李卫东 , 李加庆 , 尹鹏博 et al. 水平管道中甲醇和汽油顺序输送过程混油规律研究 . | 油气与新能源 , 2024 , 36 (04) , 57-66 . |
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Wax deposition of diesel oil and contamination of gasoline by diesel wax deposit is a severe problem in sequential transportation of product oil in pipes. However, it has long been neglected by the pipeline transportation industry. In response, this work aims to present a unique perspective on wax deposition of diesel oil and consequent contamination of gasoline. A cold finger apparatus was designed and constructed. Model oil composed of diesel and refined wax was prepared for wax deposition. Shear dispersion was excluded for wax deposition of diesel oil. Moreover, dissolution experiments of diesel wax deposit in gasoline were conducted. It was found that the dissolution rate increases with oil temperature and decreases with cold finger temperature and shear stress. Analysis on gasoline quality after diesel wax deposit dissolution indicated that contamination of gasoline caused by diesel wax deposit severely deteriorates its distillation range, but the octane number remains acceptable. This work features an interesting investigation on the wax-deposition mechanism of diesel oil, dissolution characteristics of diesel wax deposit, as well as quality deterioration of subsequent gasoline. It would be helpful in scheduling a product oil-transportation program.
Keyword ：
contamination of gasoline contamination of gasoline distillation range distillation range octane number octane number product oil pipeline product oil pipeline wax deposition of diesel wax deposition of diesel
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| GB/T 7714 | Li, Weidong , Xie, Lin , Du, Shengping et al. Wax Deposition of Diesel Oil and Consequent Contamination of Gasoline in Sequential Transportation of Product Oil Pipeline [J]. | ENERGIES , 2024 , 17 (17) . |
| MLA | Li, Weidong et al. "Wax Deposition of Diesel Oil and Consequent Contamination of Gasoline in Sequential Transportation of Product Oil Pipeline" . | ENERGIES 17 . 17 (2024) . |
| APA | Li, Weidong , Xie, Lin , Du, Shengping , Zhang, Hanqing , Mo, Jiazong , Wei, Shulong et al. Wax Deposition of Diesel Oil and Consequent Contamination of Gasoline in Sequential Transportation of Product Oil Pipeline . | ENERGIES , 2024 , 17 (17) . |
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The droplet dynamic model under an electric field is established in this paper by coupling electric equations, multiphase flow equations, and isoAdvector interface capture method, accurately predicting the deformation and rupture characteristics of multiple emulsion droplets affected by an electric field. The evolutions of the flow field and electric field during the deformation and breakup processes of multiple emulsion droplets subjected to an electric field are elucidated and the effects of the electric capillary number Ca and the radius ratio R* of the inner and outer droplets on the characteristics of droplet deformation and rupture are analyzed. The results show that in the silicone oil/water emulsion system, the inner droplet is difficult to induce charge since the electrostatic shielding effect of the outer droplet, and it has no impact on the equilibrium deformation of the outer droplet; whereas in the castor oil/silicone oil emulsion system, the charge is induced on the interfaces of both the internal and external droplets and the internal droplet has a remarkable impact on the equilibrium deformation of the external droplet. Furthermore, deformation-breakup phase diagrams of multiple emulsion droplets exposed to the electric field are obtained. As R* increases, the Cac for droplet breakup decreases, indicating that the internal droplet intensifies the breakup of the external droplet. The results are significant for the promotion and application of electric field-driven droplet manipulation technology.
Keyword ：
Breakup Breakup Deformation Deformation Electric field Electric field isoAdvector isoAdvector Multiple emulsion Multiple emulsion
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| GB/T 7714 | Huang, Xin , Lu, Yijia , Li, Yilong et al. The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field [J]. | JOURNAL OF ELECTROSTATICS , 2024 , 129 . |
| MLA | Huang, Xin et al. "The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field" . | JOURNAL OF ELECTROSTATICS 129 (2024) . |
| APA | Huang, Xin , Lu, Yijia , Li, Yilong , Luo, Xiaoming , Teng, Lin , Li, Weidong et al. The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field . | JOURNAL OF ELECTROSTATICS , 2024 , 129 . |
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Understanding the interactions between hydrogen and material integrity in polycrystalline alpha-Fe is essential for advancing the reliability of critical infrastructure and energy systems. In this study, molecular dynamics simulations were implemented to pinpoint the crack propagation behaviour and mechanism in polycrystalline alpha-Fe under various hydrogen concentrations and temperatures. The results show that a phase transition from body-centred cubic to face-centred cubic structure first occurs at the crack tip, followed by grain boundary-mediated plasticity activities at room temperature devoid of hydrogen. A limited amount of hydrogen atoms (H/Fe atomic ratio<1%) induces twinning emission from the tip, and increasing temperature further enhances dislocation plasticity as a consequence of decreased unstable stacking fault energy, thereby leading to the blunting of the crack tip. At high hydrogen concentrations (H/Fe atomic ratio>1%), the formed hydrides ahead of the crack tip suppress the phase transition, and concurrently temperature-enhanced dislocation plasticity disappears. As a consequence, the crack propagation proceeds via grain boundary cavity nucleation and growth, and ultimately evolves into intergranular fracture. These findings provide an atomistic-level explanation for temperature-dependent hydrogen-crack interaction mechanisms, and reveal a transition in the fracture mode from ductile transgranular to intergranular failure associated with locally high hydrogen concentrations found in the experiments.
Keyword ：
Cavity nucleation Cavity nucleation Crack propagation Crack propagation Hydrogen embrittlement Hydrogen embrittlement Intergranular fracture Intergranular fracture Phase transition Phase transition
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| GB/T 7714 | Li, Jiaqing , Wu, Ziyue , Yin, Pengbo et al. Temperature-dependent hydrogen-induced crack propagation behaviour and mechanism in polycrystalline α-iron: Insights from molecular dynamics simulations [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 85 : 500-510 . |
| MLA | Li, Jiaqing et al. "Temperature-dependent hydrogen-induced crack propagation behaviour and mechanism in polycrystalline α-iron: Insights from molecular dynamics simulations" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 85 (2024) : 500-510 . |
| APA | Li, Jiaqing , Wu, Ziyue , Yin, Pengbo , Teng, Lin , Zhang, Che , Deng, Guanyu et al. Temperature-dependent hydrogen-induced crack propagation behaviour and mechanism in polycrystalline α-iron: Insights from molecular dynamics simulations . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 85 , 500-510 . |
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二甲醚(DME)作为燃料具有来源广、可再生和低碳等优点，已成为最具潜力的内燃机和燃气轮机替代燃料。然而，关于DME燃烧机理的研究仍然不够深入。通过使用带有误差传播和敏感性分析的有向关系图法(DRGEPSA)对现有的高压条件下的DME燃烧详细机理进行简化获得了骨架机理(Mech＿191)，然后通过调整指前因子对Mech＿191进行优化获得了简化机理。将应用简化机理获得的指征DME燃烧的重要参数(点火延迟时间和层流火焰速度)的预测值与文献值进行了对比。结果表明，简化机理的预测值与文献值高度吻合，验证了该机理在模拟DME燃烧特性方面的有效性。此外，还发现部分关键反应(如·CH_3OCH_2的消耗反应)的确定对于准确获取重要燃烧参数有重要作用。
Keyword ：
DRGEPSA方法 DRGEPSA方法 二甲醚燃烧机理 二甲醚燃烧机理 层流火焰速度 层流火焰速度 点火延迟时间 点火延迟时间
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| GB/T 7714 | 滕霖 , 单志伟 , 李卫东 et al. 二甲醚燃烧机理简化与燃烧特性验证 [J]. | 低碳化学与化工 , 2024 , 49 (05) : 62-71 . |
| MLA | 滕霖 et al. "二甲醚燃烧机理简化与燃烧特性验证" . | 低碳化学与化工 49 . 05 (2024) : 62-71 . |
| APA | 滕霖 , 单志伟 , 李卫东 , 尹鹏博 . 二甲醚燃烧机理简化与燃烧特性验证 . | 低碳化学与化工 , 2024 , 49 (05) , 62-71 . |
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