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学者姓名：滕霖
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Abstract ：
碳捕集与封存技术(Carbon Capture and Storage,简称CCS)是实现"双碳目标"的托底技术,作为CCS技术链中间环节,高压管道运输是大规模和长距离输送二氧化碳(CO2)最经济的方式.目前,普遍认为超临界输送为最优输送相态.但我国地缘广阔,环境温度差别很大,在运输成本方面,外部条件对不同相态(超临界、密相)的CO2运输成本影响显著.为研究不同条件下的能耗影响因素,建立了CO2输送管道一维模型,模拟了不同条件下不同相态的运输管道.研究表明:环境温度、初始条件等对管道输送能耗均有不同的影响,得出在一定管径下,液态输送在环境温度-5℃以下更合适,而超临界输送在环境温度-5℃以上更合适.该研究可为不同环境温度下CO2管道输送工艺选择做参考.
Keyword ：
二氧化碳 二氧化碳 密相 密相 碳捕集与封存技术 碳捕集与封存技术 管道运输 管道运输 超临界 超临界 输送能耗 输送能耗
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| GB/T 7714 | 李凯旋 , 梁俊逸 , 刘斌 et al. 管道输送高压CO2能耗分析及相态选择研究 [J]. | 油气田地面工程 , 2025 , 44 (2) : 1-7 . |
| MLA | 李凯旋 et al. "管道输送高压CO2能耗分析及相态选择研究" . | 油气田地面工程 44 . 2 (2025) : 1-7 . |
| APA | 李凯旋 , 梁俊逸 , 刘斌 , 滕霖 . 管道输送高压CO2能耗分析及相态选择研究 . | 油气田地面工程 , 2025 , 44 (2) , 1-7 . |
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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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将一定比例的氢气掺入天然气中并通过现有天然气管道进行输送是大规模输氢的有效方式.氢气点火能量低,爆炸范围广,扩散燃烧速度快,掺氢天然气发生燃烧爆炸事故的危害性较常规天然气更大.为探究掺氢天然气管道阀室发生泄漏后的燃烧爆炸规律,采用计算流体力学软件FLACS对受限空间内输气管道法兰连接处破损后混合气体的泄漏、扩散、燃烧、爆炸过程进行了模拟研究.结果表明:气体泄漏后爆炸时混合气体中氢气含量越高,泄漏后气云点火时间越长,爆炸的强度及危害程度越大;顺风向气云爆燃强度显著强于逆风向气云燃爆强度;不同阀室结构会产生不同强度的爆炸超压,泄爆墙对降低阀室燃爆危害的作用有限,露天阀室和棚式阀室结构产生的爆炸危害较小.
Keyword ：
FLACS FLACS 掺氢天然气 掺氢天然气 燃烧爆炸 燃烧爆炸 管道输氢 管道输氢 阀室 阀室
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| GB/T 7714 | 廖丽君 , 杨杨 , 李卫东 et al. 掺氢天然气管道阀室泄漏爆炸规律研究 [J]. | 西安石油大学学报（自然科学版） , 2025 , 40 (1) : 106-114 . |
| MLA | 廖丽君 et al. "掺氢天然气管道阀室泄漏爆炸规律研究" . | 西安石油大学学报（自然科学版） 40 . 1 (2025) : 106-114 . |
| APA | 廖丽君 , 杨杨 , 李卫东 , 李慧源 , 谢镔 , 单志伟 et al. 掺氢天然气管道阀室泄漏爆炸规律研究 . | 西安石油大学学报（自然科学版） , 2025 , 40 (1) , 106-114 . |
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In the study of self-ignition during pressurized hydrogen release, the morphology of the rupture disk alters the flow and mixing processes of the gas jet, as well as the development of shock waves, thereby affecting the occurrence of self-ignition. This study employs the LES method based on the RNG-SGS model, EDC model, and NUIMech1.1 H2 combustion mechanism to investigate the flow mixing, shock wave development, and self-ignition phenomena under three different the rupture disk morphologies. The research findings indicate that as the growth trend of the rupture disk rupture ratio increases, the propagation speed of shock waves within the tube and the compression speed of the air and hydrogen-air mixing region accelerate, resulting in an earlier occurrence of self-ignition. A more complex rupture morphology leads to higher mixing rates between hydrogen and air and increased complexity of shock waves. Self-ignition initially occurs in the fuel-lean region of the boundary layer, followed by ignition at the center of the tube. The characteristic number of rupture disk is proposed to describe its impact on the self-ignition time. The competitive relationship between the two elementary reaction pathways of oxygen influences the development of the flame. © 2024 Hydrogen Energy Publications LLC
Keyword ：
High pressure High pressure Hydrogen release Hydrogen release Safety Safety Self-ignition Self-ignition Shock wave Shock wave
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| GB/T 7714 | Li, H. , Cao, X. , Cao, H. et al. Impact of rupture disk morphology on self-ignition during pressurized hydrogen release: A numerical simulation study [J]. | International Journal of Hydrogen Energy , 2024 , 84 : 863-880 . |
| MLA | Li, H. et al. "Impact of rupture disk morphology on self-ignition during pressurized hydrogen release: A numerical simulation study" . | International Journal of Hydrogen Energy 84 (2024) : 863-880 . |
| APA | Li, H. , Cao, X. , Cao, H. , Xu, Z. , Teng, L. , Bian, J. . Impact of rupture disk morphology on self-ignition during pressurized hydrogen release: A numerical simulation study . | International Journal of Hydrogen Energy , 2024 , 84 , 863-880 . |
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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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The phenomenon of spontaneous combustion during the release of high-pressure H2 is critical to the safe storage and transportation. Besides physical methods to suppress self-ignition, the approach of mixing low-reactivity gases has gained increasing attention. Previous work has mainly focused on the flow, physical heating effects, and boundary conditions of self-ignition in mixed gases, while the intrinsic chemical reaction mechanisms of spontaneous combustion remain underexplored. To clear this issue, this work uses the ReaxFF MD simulation method to study the spontaneous combustion process of H2/CO and H2/CH4 mixtures with various concentrations. The results indicate that: (1) in pure H2, H2/CO, and H2/CH4 systems, the primary initial reaction mechanism is H2+O2[dbnd]HO2+H. Additionally, in some mixed systems, CO + O2[dbnd]CO2+O and CH4+O2[dbnd]CH3+HO2 may also serve as initial reaction mechanisms. (2) Under fuel-lean combustion conditions, the RIDTs of the systems decrease, supporting the viewpoint that self-ignition typically occurs first in fuel-lean regions. The addition of CO and CH4 increases the RIDTs, which helps inhibit the development of self-ignition. (3) In H2-rich environments, CO combusts to CO2 through the formation of HOCO, while CH4 undergoes dehydrogenation and oxidation processes through intermediates such as CH3, CH3O, and HCHO, leading to the formation of CO and CO2. The combustion of H2 is also influenced by these processes. (4) The addition of CO and CH4 increases the activation energy of H2 combustion, raising the reaction energy barrier that must be overcome for spontaneous combustion. This effectively helps to suppress the occurrence and development of self-ignition during the release of high-pressure gases. © 2024 Hydrogen Energy Publications LLC
Keyword ：
Hydrogen ignition Hydrogen ignition Mixed combustion Mixed combustion Molecular dynamics Molecular dynamics Reactive force field Reactive force field
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| GB/T 7714 | Li, H. , Cao, X. , Xu, Z. et al. Impact of mixing low-reactivity gases on the mechanism of hydrogen spontaneous combustion: A ReaxFF MD study [J]. | International Journal of Hydrogen Energy , 2024 , 81 : 497-511 . |
| MLA | Li, H. et al. "Impact of mixing low-reactivity gases on the mechanism of hydrogen spontaneous combustion: A ReaxFF MD study" . | International Journal of Hydrogen Energy 81 (2024) : 497-511 . |
| APA | Li, H. , Cao, X. , Xu, Z. , Cao, H. , Teng, L. , Bian, J. . Impact of mixing low-reactivity gases on the mechanism of hydrogen spontaneous combustion: A ReaxFF MD study . | International Journal of Hydrogen Energy , 2024 , 81 , 497-511 . |
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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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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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