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学者姓名：李卫东
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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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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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回收废塑料用于沥青改性对实现废塑料资源化利用和提升基质沥青性能具有重要意义,因而受到废塑料处理和道路沥青领域研究人员的广泛关注.本文着眼于废塑料与基质沥青的相容性问题和废塑料改性沥青的性能变化,系统阐述了废塑料的回收利用现状及其在沥青领域的应用成果,归纳总结了废塑料改性沥青相容性的表征方法和性能提升方式,梳理和分析了废塑料湿法改性沥青的高低温性能、流变特性、抗疲劳性能和抗老化特性等的研究成果.综合沥青性能和研究现状提出了废塑料改性沥青的研究建议:通过多尺度研究明确废塑料对沥青改性的作用机理,探究废塑料结构与改性沥青性能间的构效关系,确定提升废塑料改性沥青相容性和低温性能的低成本方式,结合废塑料改性沥青相容性及抗老化性等特点丰富其性能评价体系.
Keyword ：
废塑料 废塑料 改性沥青 改性沥青 流变学 流变学 离析 离析 颗粒物料 颗粒物料
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| GB/T 7714 | 张东旭 , 么强 , 黑树楠 et al. 废塑料改性沥青相容性及性能分析研究进展 [J]. | 化工进展 , 2025 , 44 (3) : 1651-1665 . |
| MLA | 张东旭 et al. "废塑料改性沥青相容性及性能分析研究进展" . | 化工进展 44 . 3 (2025) : 1651-1665 . |
| APA | 张东旭 , 么强 , 黑树楠 , 李卫东 , 刘成 , 李志军 et al. 废塑料改性沥青相容性及性能分析研究进展 . | 化工进展 , 2025 , 44 (3) , 1651-1665 . |
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Wet storage of natural gas on porous materials in form of hydrate is an emerging and promising technology for natural gas storage and transportation. This work aims to systematically investigate methane storage on porous media in form of hydrate. A custom-designed high-pressure autoclave was constructed to evaluate methane adsorption under controlled conditions. Five commercially available porous media were used. In adsorption experiments, powdered activated carbon (PAC) shows the best methane uptake capability of 114.0 V/V among the five porous media. For most porous materials, wet storage dramatically improves methane uptake compared with dry adsorption. Notably, sodium dodecyl sulphate (SDS) aqueous solution proves to be more effective than pure water in accelerating hydrate formation. Methane uptake of SDS-added PAC reaches up to 139.5 V/V at 8 MPa, achieving a 22.4% improvement when compared with pure PAC. It is found that 200 mL of SDS solution and 2 degrees C of ambient temperature in the given experimental condition present the best methane uptake. Moreover, morphology of methane hydrate was directly observed and mechanism of wet storage of methane on porous media was analysed from the perspective of pore structure. Sensitivity analysis revealed that optimal methane storage on porous material requires specific water content and temperature conditions. Grain diameter of porous media presents a complex impact on the methane storage capacity and methane hydrate formation process. These findings confirm the potential of wet storage of methane in form of hydrate on porous materials and are conducive for this technology towards industrial application.
Keyword ：
Activated carbon Activated carbon Hydrate Hydrate Methane Methane Porous materials Porous materials Wet storage Wet storage
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| GB/T 7714 | Li, Weidong , Li, Shuang , Li, Lin et al. Experimental Study on Wet Storage of Methane on Porous Materials [J]. | ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING , 2025 . |
| MLA | Li, Weidong et al. "Experimental Study on Wet Storage of Methane on Porous Materials" . | ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING (2025) . |
| APA | Li, Weidong , Li, Shuang , Li, Lin , Yin, Pengbo , Li, Huiyuan , Zhang, Yufan et al. Experimental Study on Wet Storage of Methane on Porous Materials . | ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING , 2025 . |
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Wax deposition in crude oil pipelines critically undermines flow efficiency and increases operational costs, yet the aging behavior of wax deposits in polyethylene pipelines under water-containing conditions remains underexplored. This study presents systematic investigation into the water-containing aging dynamics of wax deposits in polyethylene pipelines, addressing a gap in multiphase flow deposition research. A flow loop with interchangeable polyethylene and steel test sections was employed to conduct wax deposition experiments under water contents (0-50 vol%) and temperature conditions (bulk 25-29 degrees C, wall 19-23 degrees C). Differential scanning calorimetry was used to quantify wax content, while heat transfer and wax precipitation analysis provided insights. Innovatively, polyethylene pipes demonstrated 16.3-68.3% lower aging rates than steel pipes under identical conditions, directly attributed to their 15.6-32.2% lower radial concentration gradients. This reduction is linked to polyethylene's inherently lower thermal conductivity, establishing a novel material-driven correlation in wax deposition dynamics. Notably, when the water content reaches 50 vol%, this causes phase inversion of the emulsion, resulting in negative aging rates of the deposition layer. These findings redefine design parameters for high-water-cut polyethylene pipelines, enabling predictive maintenance to minimize pigging frequency.
Keyword ：
Heat transfer Heat transfer oil-water emulsion oil-water emulsion polyethylene pipe polyethylene pipe wax content wax content wax deposition wax deposition
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| GB/T 7714 | Li, Weidong , Fan, Kaifeng , Li, Rongbin . Investigation of wax deposition aging rate for oil-water emulsions using polyethylene and steel pipes [J]. | PETROLEUM SCIENCE AND TECHNOLOGY , 2025 . |
| MLA | Li, Weidong et al. "Investigation of wax deposition aging rate for oil-water emulsions using polyethylene and steel pipes" . | PETROLEUM SCIENCE AND TECHNOLOGY (2025) . |
| APA | Li, Weidong , Fan, Kaifeng , Li, Rongbin . Investigation of wax deposition aging rate for oil-water emulsions using polyethylene and steel pipes . | PETROLEUM SCIENCE AND TECHNOLOGY , 2025 . |
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Ammonia is a high-efficiency and safe hydrogen storage medium. Pipeline transport offers significant economic benefits for long-distance ammonia transportation. However, due to ammonia's toxicity, accidental leaks during transportation can lead to catastrophic consequences. Therefore, a comprehensive understanding of the dispersion characteristics of liquid ammonia pipeline leaks is essential for safety measures. Prior studies focused on the ammonia dispersion over flat terrain, leaving a gap in understanding the impact of diverse terrains on dispersion dynamics. This study introduces a computational fluid dynamics model to simulate ammonia dispersion over complex terrain, quantifying the influence of topographical features on dispersion consequence distances. Firstly, validation of the numerical model is conducted using a custom-built open-circuit wind tunnel test platform. Secondly, the dispersion of ammonia is analyzed over six representative terrains, highlighting the influence of complex topographies on the consequence distances. Additionally, the effects of leakage flow rate, atmospheric stability, and leakage direction on dispersion over flat terrain are examined. Finally, a comprehensive assessment of potential risks associated with liquid ammonia pipeline leaks across various terrains is provided by the synthesis and analysis. The results indicate that flat terrain simulations cannot conservatively estimate consequence distances for most terrains. Therefore, incorporating local terrain data in dispersion simulations is recommended to determine the impact area accurately.
Keyword ：
Ammonia-Hydrogen energy Ammonia-Hydrogen energy Ammonia release Ammonia release CFD modelling CFD modelling Complex terrain Complex terrain Dispersion Dispersion Liquid ammonia pipeline Liquid ammonia pipeline
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| GB/T 7714 | Teng, Lin , Wang, Kangkang , Liu, Bin et al. The consequence distance of liquid ammonia release from a pipeline in complex terrain [J]. | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2025 , 196 . |
| MLA | Teng, Lin et al. "The consequence distance of liquid ammonia release from a pipeline in complex terrain" . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 196 (2025) . |
| APA | Teng, Lin , Wang, Kangkang , Liu, Bin , Li, Weidong , Yin, Pengbo , Li, Zhenchao et al. The consequence distance of liquid ammonia release from a pipeline in complex terrain . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2025 , 196 . |
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Recycling of waste plastics for asphalt modification is important to achieve the resourceful use of waste plastics and improve base asphalt properties. Therefore, it has received wide attention in the field of waste plastics processing and asphalt pavement. This paper focused on the compatibility and the performance of waste plastic modified asphalt. Current situation of waste plastics and its application in the field of asphalts was systematically described. The characterization and enhancement methods of compatibility of waste plastic modified asphalt were summarized. Moreover, the research results of high and low temperature properties, rheological, fatigue and aging properties of waste plastic modified asphalt were reviewed and analyzed. Comprehensive asphalt performance and the research status put forward the research recommendations. In the future, the mechanism of waste plastics used in asphalt modification should be clarified through multi-scale methods. The constitutive relationship between waste plastic structure and asphalt properties should be investigated. In addition, low-cost ways to improve the compatibility and low-temperature performance of waste plastic modified asphalt should be identified and the performance evaluation system should be enriched by combining the characteristics of modified asphalt including compatibility and aging property. © 2025 Chemical Industry Press Co., Ltd.. All rights reserved.
Keyword ：
Asphalt Asphalt Asphalt pavements Asphalt pavements Plastic recycling Plastic recycling Plastics Plastics Plastics industry Plastics industry
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| GB/T 7714 | Zhang, Dongxu , Yao, Qiang , Hei, Shunan et al. Compatibility and performance analysis of waste plastic modified asphalts: A review [J]. | Chemical Industry and Engineering Progress , 2025 , 44 (3) : 1651-1665 . |
| MLA | Zhang, Dongxu et al. "Compatibility and performance analysis of waste plastic modified asphalts: A review" . | Chemical Industry and Engineering Progress 44 . 3 (2025) : 1651-1665 . |
| APA | Zhang, Dongxu , Yao, Qiang , Hei, Shunan , Li, Weidong , Liu, Cheng , Li, Zhijun et al. Compatibility and performance analysis of waste plastic modified asphalts: A review . | Chemical Industry and Engineering Progress , 2025 , 44 (3) , 1651-1665 . |
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Wax deposition in wells and long-distance pipelines is a significant issue, leading to a reduced flow area, increased system pressure, and higher flow resistance. In extreme cases, it can cause complete pipeline blockage, posing serious risks to crude oil production and transportation. As a result, wax deposition has long been a central focus of petroleum research, particularly the radial characteristics of wax deposits. This paper provides a comprehensive review of the latest research on the radial properties of wax deposits, focusing on key aspects such as influencing mechanisms, experimental setups, sampling methods, physicochemical property variations, and predictive models. It systematically evaluates the primary technical approaches and findings in this field, highlighting key achievements, current challenges, and potential future research focuses. This review aims to offer readers a clear understanding of the methodologies employed, common challenges, established conclusions, and ongoing debates while providing valuable insights for advancing research on the radial properties of wax deposits.
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| GB/T 7714 | Fan, Kaifeng , Ma, Yuning , Li, Peixian et al. Review on Radial Properties of Wax Deposits in Crude Oil Pipelines: Mechanism, Experiment, Property Variation, and Prediction [J]. | ENERGY & FUELS , 2025 , 39 (20) : 9262-9284 . |
| MLA | Fan, Kaifeng et al. "Review on Radial Properties of Wax Deposits in Crude Oil Pipelines: Mechanism, Experiment, Property Variation, and Prediction" . | ENERGY & FUELS 39 . 20 (2025) : 9262-9284 . |
| APA | Fan, Kaifeng , Ma, Yuning , Li, Peixian , Yu, Chunhao , Lei, Yun , Li, Si et al. Review on Radial Properties of Wax Deposits in Crude Oil Pipelines: Mechanism, Experiment, Property Variation, and Prediction . | ENERGY & FUELS , 2025 , 39 (20) , 9262-9284 . |
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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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During the high water cut period of oilfield development, conventional heated gathering and transportation systems incur exponentially rising energy consumption. The Wall sticking onset temperature (WSOT) is the key boundary parameter for low-temperature gathering and transportation. However, its predictive remains challenging owing to insufficient understanding of the wall sticking mechanism. Traditional WSOT predictive models commonly use Sauter mean diameter to simplify the droplet size distribution, ignoring the multiscale effect of the distribution width on the interfacial adhesion, which results in limited predictive accuracy under complex working conditions. In this study, we used a combination of cold finger experiments and microscopic observations to reveal for the first time the correlation mechanism between the WSOT of high water cut crude oil and the characteristics of the log-normal distribution of droplets in the oil-water mixture system. Based on the dynamic force balance theory, we innovatively proposed a dynamic correction method for the equivalent adhesion radius based on the dynamic distribution parameters (geometric mean and standard deviation), which breaks through the limitation of the traditional Sauter mean diameter to characterize a single scale only, and establishes a predictive model of WSOT considering the characteristics of droplet distribution. The model validation showed that the predictive error was <= +/- 4.802 %, which was significantly better than the model based on Sauter mean diameter. It is further found that regulating the water cut and shear rate can significantly reduce the WSOT by refining the droplet size and narrowing the distribution, which provides a new theoretical tool for the optimization of low-temperature gathering and transportation process.
Keyword ：
High water cut crude oil High water cut crude oil Log-normal distribution Log-normal distribution Low-temperature gathering and transportation Low-temperature gathering and transportation Wall sticking onset temperature (WSOT) Wall sticking onset temperature (WSOT) WSOT predictive model WSOT predictive model
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| GB/T 7714 | Sun, Jie , Li, Dechi , Shi, Gaojun et al. Predictive model for wall sticking onset temperature in high water cut crude oil pipes based on dynamic equilibrium of droplet distribution [J]. | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2025 , 725 . |
| MLA | Sun, Jie et al. "Predictive model for wall sticking onset temperature in high water cut crude oil pipes based on dynamic equilibrium of droplet distribution" . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 725 (2025) . |
| APA | Sun, Jie , Li, Dechi , Shi, Gaojun , Zeng, Xingjie , Yang, Zixin , Wen, Yi et al. Predictive model for wall sticking onset temperature in high water cut crude oil pipes based on dynamic equilibrium of droplet distribution . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2025 , 725 . |
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