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学者姓名：李臻超
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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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Abstract ：
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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Technological innovation is urgently needed to solve the problem of hydrate formation in oil and gas transmission pipelines for the flow assurance guarantee. Typical kinetic hydrate inhibitors for industrial application are the combination of lactam-based polymers with solvent synergists. In this study, a novel non-solvent synergist leucine (Leu) was proposed for improving the kinetic inhibition effect of polyvinyl caprolactam (PVCap). The synergism of PVCap and Leu was investigated via molecular dynamics simulations. Results showed that the 1 wt% PVCap + 2 wt% Leu system can totally inhibit methane hydrate formation within the simulation period, and the combination systems with other concentrations have negligible effects on delaying hydrate nucleation but can significantly slow down the hydrate growth rate. The excellent synergism of PVCap and Leu may be due to the large diffusion coefficient of the molecules in the systems, which provides a high probability for the aggregation of methane molecules and induces the formation of bubbles. In addition, the bubbles can be further stabilized by the amphiphilic PVCap and Leu molecules around it. This study also provides new insights to develop powerful synergists for PVCap, which would be helpful to the design strategy of KHIs with high efficiency.
Keyword ：
Gas hydrate Gas hydrate Kinetic hydrate inhibitor Kinetic hydrate inhibitor Synergist Synergist Synergistic mechanism Synergistic mechanism
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| GB/T 7714 | Zhang, Qian , Tan, Yibin , Li, Zhenchao et al. Insights into the synergistic effect of polylactam kinetic hydrate inhibitor and amino acid via molecular dynamics simulations [J]. | ENERGY , 2024 , 299 . |
| MLA | Zhang, Qian et al. "Insights into the synergistic effect of polylactam kinetic hydrate inhibitor and amino acid via molecular dynamics simulations" . | ENERGY 299 (2024) . |
| APA | Zhang, Qian , Tan, Yibin , Li, Zhenchao , Liang, Deqing , Long, Zhen , Liu, Xiaoqiang et al. Insights into the synergistic effect of polylactam kinetic hydrate inhibitor and amino acid via molecular dynamics simulations . | ENERGY , 2024 , 299 . |
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The mass transfer characteristics during ammonia absorption into a sessile water droplet in a small controlledatmosphere wind tunnel were investigated using particle tracking velocimetry (PTV) with polystyrene microspheres. The results showed that the flow field inside the droplet transformed from Marangoni convection to Rayleigh convection in the absence of gas flow. As the gas velocity increased, the drag force-induced circulation inhibited the Marangoni convection in the initial stage of the mass transfer process and Rayleigh convection in the advanced stage. However, the suppressed Marangoni convection cells recurred at high initial ammonia concentrations. Compared with the initial ammonia concentration in the wind tunnel and droplet size, the gas velocity significantly increased the gas-phase mass transfer coefficient. Furthermore, a calculation model for ammonia absorption by a moving droplet was derived based on the Colburn analogy and the two-film theory. The gas-phase mass transfer coefficients calculated using the model coincided with the experimental results. These results will help the design of water curtains.
Keyword ：
Ammonia absorption Ammonia absorption Mass transfer coefficient Mass transfer coefficient Mathematical model Mathematical model Particle tracking velocimetry Particle tracking velocimetry Rayleigh -Be nard -Marangoni convection Rayleigh -Be nard -Marangoni convection
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| GB/T 7714 | Bai, Jinbao , Wang, Weifeng , Qiu, Guopan et al. Ammonia absorption by water droplet in a small controlled atmosphere wind tunnel [J]. | CHEMICAL ENGINEERING SCIENCE , 2024 , 292 . |
| MLA | Bai, Jinbao et al. "Ammonia absorption by water droplet in a small controlled atmosphere wind tunnel" . | CHEMICAL ENGINEERING SCIENCE 292 (2024) . |
| APA | Bai, Jinbao , Wang, Weifeng , Qiu, Guopan , Huang, Xin , Yin, Pengbo , Li, Zhenchao et al. Ammonia absorption by water droplet in a small controlled atmosphere wind tunnel . | CHEMICAL ENGINEERING SCIENCE , 2024 , 292 . |
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The complex pore structure of unconventional oil and gas reservoirs is one of the reasons for the difficulties in resource evaluation and development. Therefore, it is crucial to comprehensively characterize the pore structure, understand reservoir heterogeneity from multiple perspectives, and gain an in-depth understanding of fluid migration and accumulation mechanisms. This review outlines the methods and basic principles for characterizing microporous systems in unconventional reservoirs, summarizes the fractal analysis corresponding to the different methods, sorts out the relationship between the fractals and reservoir macroscopic physical properties (porosity, permeability, etc.) with the reservoir microscopic pore structures (pore structure parameters, pore connectivity, etc.). The research focuses on cutting-edge applications of characterization techniques, such as improved characterization accuracy, calibration of PSD ranges, and identification of different hydrogen compositions in pore systems for dynamic assessment of unconventional reservoirs. Fractal dimension analysis can effectively identify the quality level of the reservoir; complex pore-throat structures reduce permeability and destroy free fluid storage space, and the saturation of removable fluids is negatively correlated with Df. As for the mineral composition, the fractal dimension is positively correlated with quartz, negatively correlated with feldspar, and weakly correlated with clay mineral content. In future qualitative characterization studies, the application and combination of contrast agents, molecular dynamics simulations, artificial intelligence techniques, and 4D imaging techniques can effectively improve the spatial resolution of the images and explore the adsorption/desorption of gases within the pores, and also help to reduce the computational cost of these processes; these could also attempt to link reservoir characterization to research on supercritical carbon dioxide-enhanced integrated shale gas recovery, carbon geological sequestration, and advanced underground hydrogen storage.
Keyword ：
fractal dimension fractal dimension pore system characterization pore system characterization scale upgrade scale upgrade unconventional reservoirs unconventional reservoirs
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| GB/T 7714 | Guan, Wen , Cai, Wenjiu , Li, Zhenchao et al. Microscopic Characterization and Fractal Analysis of Pore Systems for Unconventional Reservoirs [J]. | JOURNAL OF MARINE SCIENCE AND ENGINEERING , 2024 , 12 (6) . |
| MLA | Guan, Wen et al. "Microscopic Characterization and Fractal Analysis of Pore Systems for Unconventional Reservoirs" . | JOURNAL OF MARINE SCIENCE AND ENGINEERING 12 . 6 (2024) . |
| APA | Guan, Wen , Cai, Wenjiu , Li, Zhenchao , Lu, Hailong . Microscopic Characterization and Fractal Analysis of Pore Systems for Unconventional Reservoirs . | JOURNAL OF MARINE SCIENCE AND ENGINEERING , 2024 , 12 (6) . |
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Based on the in situ observation of methane hydrate formation in restricted spaces by confocal Raman imaging microscopy, a bubble intrusion mechanism is proposed. Hydrates are found to form both at the gas-water-solid triple-phase contact line and at the gas-water interface. Hydrates at the triple-phase contact line can form capillary channels with solid surfaces. The formed capillary channels can force the water inside the droplet to diffuse outward, leading to shrinkage of the droplet edge and generation of gas bubbles inside the droplet. Hydrates can then rapidly form at the bubble-solution interface. With the method of Raman imaging, gas channels are found in the interfacial hydrates, acting as bridges connecting bubbles and the surrounding solution. Through these gas channels, methane gas can dissolve rapidly into the solution in the droplets, thereby promoting the formation of hydrates in the droplets.
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| GB/T 7714 | Li, Zhenchao , Cai, Wenjiu , Deng, Yajun et al. Bubble Evolution and Its Effects on Methane Hydrate Formation in a Restricted Space [J]. | ENERGY & FUELS , 2024 , 38 (23) : 22876-22884 . |
| MLA | Li, Zhenchao et al. "Bubble Evolution and Its Effects on Methane Hydrate Formation in a Restricted Space" . | ENERGY & FUELS 38 . 23 (2024) : 22876-22884 . |
| APA | Li, Zhenchao , Cai, Wenjiu , Deng, Yajun , Rao, Shihang , Zhang, Qian , Lu, Hailong . Bubble Evolution and Its Effects on Methane Hydrate Formation in a Restricted Space . | ENERGY & FUELS , 2024 , 38 (23) , 22876-22884 . |
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氨作为零碳绿色能源载体,可以有效替代化石燃料,实现节能减排.液氨管道是目前最为高效安全的氨能长距离输送方式之一,其经济性评价是提高管输经济效益和优化管输参数的重要依据.基于国内外液氨管道输送工程,建立长距离液氨管道系统输送技术模型和经济性评价模型,对不同管道直径、管道输量、入口温度和输送距离下的液氨管道单位运输成本和年化运输成本构成进行对比分析.结果表明:流速恒定时,随管径增加,单位运输成本先快速下降后逐渐平缓,而年化运输成本变化与之相反,其中管道建设和年运行维护费用起主导作用;流量恒定时,单位运输成本和年化运输成本均随管径增大呈线性增加;随管道输量增加,单位运输成本显著降低,年化运输成本呈线性增加,其中泵建设和运营维护费用显著增加;随着入口温度升高,单位运输成本和年化运输成本逐渐增加且增幅较小;随输送距离增加,单位运输成本不断下降且趋势逐渐平缓;大管径、大输量下的管输经济效益更高.
Keyword ：
敏感性 敏感性 液氨 液氨 经济评价 经济评价 运输成本 运输成本 长输管道 长输管道
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| GB/T 7714 | 尹鹏博 , 李逸龙 , 滕霖 et al. 液氨长输管道技术经济性分析 [J]. | 油气与新能源 , 2024 , 36 (6) : 75-83 . |
| MLA | 尹鹏博 et al. "液氨长输管道技术经济性分析" . | 油气与新能源 36 . 6 (2024) : 75-83 . |
| APA | 尹鹏博 , 李逸龙 , 滕霖 , 黄鑫 , 李臻超 , 罗宇 et al. 液氨长输管道技术经济性分析 . | 油气与新能源 , 2024 , 36 (6) , 75-83 . |
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CO2 hydrate formation in a restricted space is studied by conducting in situ visual observation when CO2 gas reacts with a water droplet between two silicon wafers at 2.8-3.8 MPa and -6 to 6 degrees C. It is found that the hydrate film first appears around the gas-liquid interface and then spreads on the surface of silicon wafer by continuous formation at the advancing front. Experiments are also conducted with silicon wafers with different surface properties, prepared by the pretreatment methods of three types, to study the effect of solid surface on CO2 hydrate formation. The results show that no hydrate spreading is observed on the hydrophobic surface pretreated by 1H,1H,2H,2H-perfluorodecyltriethoxysilane solution or crude oil; the hydrate film is observed, and it spreads on the hydrophilic surface pretreated by piranha solution. Quantitative analysis of the results obtained is employed to understand the intrinsic mechanism. It is found that considering the hydrate film spreading on solid surfaces under experimental conditions, the interfacial tension of hydrate and silicon wafer might play a more significant role in hydrate spreading rate and hydrate film thickness compared to pressure and temperature.
Keyword ：
CO2 hydrate CO2 hydrate hydrate formation hydrate formation restricted space restricted space surface property surface property wettability wettability
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| GB/T 7714 | Rao, Shihang , Deng, Yajun , Li, Zhenchao et al. Effect of Solid Surface Properties on Spreading of a CO2 Hydrate Film in a Restricted Space between Two Parallel Silicon Substrates [J]. | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2023 , 11 (39) : 14399-14408 . |
| MLA | Rao, Shihang et al. "Effect of Solid Surface Properties on Spreading of a CO2 Hydrate Film in a Restricted Space between Two Parallel Silicon Substrates" . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING 11 . 39 (2023) : 14399-14408 . |
| APA | Rao, Shihang , Deng, Yajun , Li, Zhenchao , Lu, Hailong , Zhang, Qian . Effect of Solid Surface Properties on Spreading of a CO2 Hydrate Film in a Restricted Space between Two Parallel Silicon Substrates . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2023 , 11 (39) , 14399-14408 . |
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