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学者姓名：崔勍焱
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The recovery of CH4 from coalbed gas (CBG) is significant for improving energy utilization and mitigating the greenhouse effect. In this study, CH4 was separated from CBG by forming sII hydrate with 5.56 mol % 1,3-dioxolane (DIOX) solution assisted by an eco-friendly promoter sodium lauroyl glutamate (SLG). The effects of SLG concentration, initial pressure and temperature, stirring rate, and CBG composition were systematically investigated. The results revealed that the addition of SLG notably diminished the hydrate induction time and reaction durations. The presence of 500 ppm of SLG decreased the CH4 concentration to 15.50 mol % from the initial 30.23 mol %, and the CH4 recovery and separation factor reached 81.70% and 3.34, respectively. Comparative analyses with other eco-friendly surfactants highlighted the substantial advantages of SLG. The CH4 concentration in the residual gas first decreased and then increased with the augmentation of the initial pressure, temperature, and stirring rate. An inverse pattern was observed in the variations of CH4 recovery and separation factor. This indicated that there existed an optimal initial pressure, temperature, and stirring rate for CBG separation. The CH4 content in the hydrate was increased to 91.59% after a fourth-stage enrichment, meeting the standards for the direct injection of CBG into natural gas pipelines. These findings provide valuable insights for CH4 separation from CBG by forming sII hydrate with eco-friendly promoters.
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| GB/T 7714 | Mu, Liang , Zhu, Xiaohai , Lai, Jintao et al. Methane Recovery from Coalbed Gas by Forming sII Hydrate with the Aid of a Novel Eco-Friendly Promoter [J]. | ENERGY & FUELS , 2025 , 39 (8) : 3752-3764 . |
| MLA | Mu, Liang et al. "Methane Recovery from Coalbed Gas by Forming sII Hydrate with the Aid of a Novel Eco-Friendly Promoter" . | ENERGY & FUELS 39 . 8 (2025) : 3752-3764 . |
| APA | Mu, Liang , Zhu, Xiaohai , Lai, Jintao , Zeng, Jiguang , Cui, Qingyan . Methane Recovery from Coalbed Gas by Forming sII Hydrate with the Aid of a Novel Eco-Friendly Promoter . | ENERGY & FUELS , 2025 , 39 (8) , 3752-3764 . |
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A low-cost and process-intensified synthesis approach of SSZ-35 zeolite via a seed-assisted method is presented. This approach involves the development of a relatively inexpensive template and the application of seeds to minimize crystallization time and template consumption. Herein, N-Ethyl, N-methyl 2,6-cis-dimethylpiperidinium hydroxide (EMDMPOH) is selected as a template to synthesize SSZ-35 zeolite, and a simplified and optimized scheme for the preparation of such a template is proposed. Specially, the high-purity EMDMPOH is prepared by a sequential alkylation of 2,6-dimethylpiperidine with iodoethane and iodomethane, followed by ion exchange. By employing a seed-assisted strategy, the synthesis process of SSZ-35 zeolite is intensified, resulting in a significant reduction in crystallization time from 7 d to 75 h. Systematic characterizations reveal that the synthesized SSZ-35 zeolite has smaller crystals and larger specific surface area in comparison with the reference sample, leading to enhanced selectivity in n-octane hydroisomerization. Moreover, the cost accounting analysis shows a notable decrease in the synthesis cost of SSZ-35 zeolite by using the synthesis route that combines the simplified process for preparing the template and the reduced amount of template.
Keyword ：
Crystallization intensification Crystallization intensification Low-cost synthesis Low-cost synthesis Seed-assisted method Seed-assisted method SSZ-35 zeolite SSZ-35 zeolite
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| GB/T 7714 | Dong, Peng , Wu, Huanliu , Luo, Longhua et al. Low-cost and efficient synthesis of SSZ-35 zeolite through a seed-assisted approach [J]. | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION , 2025 , 208 . |
| MLA | Dong, Peng et al. "Low-cost and efficient synthesis of SSZ-35 zeolite through a seed-assisted approach" . | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION 208 (2025) . |
| APA | Dong, Peng , Wu, Huanliu , Luo, Longhua , Cui, Qingyan , Li, Tiesen , Shi, Jie et al. Low-cost and efficient synthesis of SSZ-35 zeolite through a seed-assisted approach . | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION , 2025 , 208 . |
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In order to gain insight into the influence of SiO2 support particle size on the vacuum residue (VR) slurry-phase hydrocracking performance of Fe-based catalysts, a series of FeZn/SiO2 catalysts with varying SiO2 particle sizes were prepared. Characterization results show that the surface area and pore volume of the FeZn/SiO2 catalysts increase with the reduction of SiO2 particle sizes. The metals Fe and Zn species on FeZn/SiO2-S catalyst are more readily reducible via H2-TPR analysis. Notably, FeZn/SiO2-S catalyst presents higher metal dispersion and a greater degree of sulfurization compared to the other catalysts by XRD and XPS. Hydrocracking results demonstrate that the FeZn/SiO2-S catalyst achieves the lowest coke and gas yields (11.9 wt% and 0.4 wt%), respectively, and the highest VR conversion among these catalysts. The superior performance of the FeZn/SiO2-S catalyst in VR slurry-phase hydrocracking is ascribed to its enhanced hydrogenation activity, deriving from the higher dispersion and sulfurization of metals species. This suppresses the aggregation of polycyclic aromatic hydrocarbons in VR and the over-cracking of intermediate products. Additionally, the increased mesopore associated with smaller SiO2 particles facilitates to the diffusion of large VR molecules, further promoting the hydrocracking reaction.
Keyword ：
FeZn catalyst FeZn catalyst Hydrogenation activity Hydrogenation activity SiO2 particle size SiO2 particle size Slurry-phase hydrocracking Slurry-phase hydrocracking Vacuum residue Vacuum residue
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| GB/T 7714 | Wang, Jianbo , Yan, Jianteng , Cui, Qingyan et al. Effect of SiO2 support particle sizes on the performance of FeZn catalysts in VR slurry-phase hydrocracking [J]. | CATALYSIS TODAY , 2025 , 449 . |
| MLA | Wang, Jianbo et al. "Effect of SiO2 support particle sizes on the performance of FeZn catalysts in VR slurry-phase hydrocracking" . | CATALYSIS TODAY 449 (2025) . |
| APA | Wang, Jianbo , Yan, Jianteng , Cui, Qingyan , Li, Tiesen , Shi, Jie , Wang, Tinghai et al. Effect of SiO2 support particle sizes on the performance of FeZn catalysts in VR slurry-phase hydrocracking . | CATALYSIS TODAY , 2025 , 449 . |
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在新工科建设的背景下,工程教育面临跨学科融合、创新能力培养等新需求.传热学作为工科学生的基础课程之一,承担着培养学生理论与实践结合能力的重要职责.然而,传统的传热学课程存在教学内容陈旧、教学方法单一、理论与实践脱节、学生创新能力和跨学科思维不足等问题,难以适应新工科要求.针对这些问题,提出了课程内容优化、教学方法创新、实践教学强化等教学改革措施,并通过实践探索了改革的效果.结果表明,这些措施显著提升了学生的学习兴趣和综合能力,符合新工科人才培养的需求.
Keyword ：
传热学 传热学 实践探索 实践探索 教学改革 教学改革 新工科 新工科
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| GB/T 7714 | 穆亮 , 崔勍焱 . 新工科背景下传热学课程教学改革与实践探索 [J]. | 当代教育实践与教学研究（电子刊） , 2025 , (6) : 41-44 . |
| MLA | 穆亮 et al. "新工科背景下传热学课程教学改革与实践探索" . | 当代教育实践与教学研究（电子刊） 6 (2025) : 41-44 . |
| APA | 穆亮 , 崔勍焱 . 新工科背景下传热学课程教学改革与实践探索 . | 当代教育实践与教学研究（电子刊） , 2025 , (6) , 41-44 . |
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Natural gas hydrate (NGH) mining via CH4/CO2 exchange integrates CH4 extraction with CO2 geological sequestration, thereby facilitating the achievement of carbon neutrality. However, the relatively low replacement cost remains a significant bottleneck that hinders its large-scale application. In this study, we investigated the potential of intermittent ultrasonic assistance to enhance CH4/CO2 replacement in hydrate-bearing sediments. The effects of ultrasonic power, experimental pressure, and temperature, as well as initial water and hydrate saturations, were systematically analyzed. Results demonstrated that both CH4 recovery and CO2 sequestration rates exhibited an increasing trend with higher ultrasonic power. Specifically, at 100% ultrasonic power, the CH4 recovery and CO2 sequestration rates reached 79.06% and 55.94%, respectively. Additionally, both rates increased as the pressure decreased and the temperature rose. Notably, ultrasonic assistance significantly improved CH4/CO2 replacement even under conditions where the experimental pressure exceeded the CH4 hydrate phase boundary, or the temperature was below the freezing point. Increased initial water saturation was found to be beneficial for the ultrasonic-assisted CH4/CO2 replacement, whereas a higher hydrate saturation negatively impacted the process. These findings provide valuable insights into enhancing CH4/CO2 swapping and contribute to the advancement of NGH mining and CO2 geological sequestration technologies. © 2025 American Chemical Society.
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| GB/T 7714 | Mu, L. , Zeng, J. , Lin, X. et al. Intermittent Ultrasonic-Assisted CO2 Replacement for CH4 Extraction from Hydrate-Bearing Clay-Silt Sediments [J]. | Energy and Fuels , 2025 . |
| MLA | Mu, L. et al. "Intermittent Ultrasonic-Assisted CO2 Replacement for CH4 Extraction from Hydrate-Bearing Clay-Silt Sediments" . | Energy and Fuels (2025) . |
| APA | Mu, L. , Zeng, J. , Lin, X. , Liu, M. , Cui, Q. . Intermittent Ultrasonic-Assisted CO2 Replacement for CH4 Extraction from Hydrate-Bearing Clay-Silt Sediments . | Energy and Fuels , 2025 . |
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Natural gas hydrates (NGH) as a potential energy resource gain much attention, the depressurization-assisted CH4/CO2 replacement is a combined method proposed recently for NGH mining. This work experimentally investigated the depressurization-assisted CH4/CO2 replacement behavior in the muddy-silt slurries, and the effect of depressurization moment, amplitude and frequency was systematically examined. The results revealed that the depressurization after replacement significantly promoted reaction within a short period. The CH4 replacement ratio was increased by delaying the depressurization moment and increasing the depressurization magnitude. The maximum CH4 replacement ratio reached 61.28% at the depressurization moment of 48 h and 274.15 K. Additionally, the CH4 replacement ratio was further increased in the secondary depressurization event compared to that at the primary depressurization. This research indicated that the depressurization was beneficial for CO2 sequestration when the replacement pressure is higher than CO2 hydrate equilibrium pressure. While it did not facilitate CO2 sequestration when the replacement pressure is close to CO2 hydrate equilibrium pressure. The free water consumption decreased with the increase of the depressurization moment, amplitude and frequency. These findings would contribute to the development of the depressurization-assisted CO2/CH4 replacement in the future. © 2024 Elsevier B.V.
Keyword ：
Carbon dioxide Carbon dioxide Energy resources Energy resources Gas hydrates Gas hydrates Hydration Hydration Mining Mining Potential energy Potential energy Silt Silt
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| GB/T 7714 | Mu, Liang , Zhao, Huixing , Li, Xianlong et al. Experimental investigation on the depressurization-assisted CH4/CO2 replacement behavior in the muddy silt slurries [J]. | Gas Science and Engineering , 2024 , 126 . |
| MLA | Mu, Liang et al. "Experimental investigation on the depressurization-assisted CH4/CO2 replacement behavior in the muddy silt slurries" . | Gas Science and Engineering 126 (2024) . |
| APA | Mu, Liang , Zhao, Huixing , Li, Xianlong , Zeng, Jiguang , Cui, Qingyan . Experimental investigation on the depressurization-assisted CH4/CO2 replacement behavior in the muddy silt slurries . | Gas Science and Engineering , 2024 , 126 . |
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The gas-hydrate-sediment-water multiphase flow is often involved in drilling and exploitation of natural gas hydrate (NGH) reservoirs in seabed due to its weak cementation; therefore, understanding hydrate formation and decomposition in sediment-contained slurries is important. In this work, CH4 hydrate formation and decomposition in clay-silt slurries was explored, the effects of clay type and content, stirring rate, additives, experimental temperature, and pressure were systematically investigated. The presence of clay notably accelerated CH4 hydrate formation in slurries, and the montmorillonite exhibited a more obvious promotion effect than kaolinite. As the stirring rate increased, the induction time and reaction time were shortened, while the gas consumption rate and water conversion increased. The addition of 500 ppm sodium dodecyl sulfate (SDS) and 1.0 wt % fulvic acid (FA) significantly reduced the induction time and increased hydrate formation rate. During the interaction of SDS and sediment, CH4 hydrate formed in the slurries instantaneously. The CH4 hydrate decomposition rate in slurries increased as the experimental temperature increased or the pressure decreased. The temperature had a limited impact on the decomposition time above freezing point, while it was significant below freezing point. The presence of clay notably decreased the CH4 hydrate decomposition rate in slurries. Compared to the clay-free system, the ΔTd values (temperature decreased during hydrate decomposition) in the montmorillonite systems were decreased, while they were increased in the kaolinite systems. The findings provide valuable insights for the exploitation of marine NGH. © 2024 American Chemical Society.
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| GB/T 7714 | Mu, L. , Lai, J. , Li, X. et al. Methane Hydrate Formation and Decomposition Process in Clay-Silt Slurries [J]. | Energy and Fuels , 2024 , 38 (16) : 15103-15115 . |
| MLA | Mu, L. et al. "Methane Hydrate Formation and Decomposition Process in Clay-Silt Slurries" . | Energy and Fuels 38 . 16 (2024) : 15103-15115 . |
| APA | Mu, L. , Lai, J. , Li, X. , Zhao, H. , Zeng, J. , Cui, Q. . Methane Hydrate Formation and Decomposition Process in Clay-Silt Slurries . | Energy and Fuels , 2024 , 38 (16) , 15103-15115 . |
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The existence of organic matters in naturally hydrate-bearing sediments would notably impact the CH4 extraction from reservoirs via CO2 swapping. In this work, the depressurization-assisted flue gas replacement was explored with artificial hydrate-bearing clay-silt sediments containing organic matter. The effect of organic matter type and content, depressurization moment and amplitude was systematically investigated. The results showed that the replacement was promoted at 5.0 wt% sulfonated lignin (SL) before depressurization, while it was inhibited at a lower SL content and this inhibition was weakened after depressurization. The CH4 replacement ratio and CO2 sequestration ratio increased as the fulvic acid (FA) content increased. For the organic matter-contained systems, the earlier depressurization moment was conducted, the higher CH4 recovery was obtained. The CH4 replacement ratio increased with the increase of depressurization amplitude, which reached 71.48 % in the 3.0 wt% FA system at the depressurization amplitude of 3.0 MPa. Aspen simulation revealed that the energy consumption was mainly caused by compression, there exist an optimum injection pressure of flue gas for the energy return on investment. The findings provide useful information for the depressurization-assisted flue gas replacement and would contribute to the actual NGH exploitation in the future. © 2024 Elsevier Ltd
Keyword ：
CH4 hydrate CH4 hydrate Clay-silt sediment Clay-silt sediment Depressurization-assisted Depressurization-assisted Flue gas replacement Flue gas replacement Organic matter Organic matter
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| GB/T 7714 | Mu, L. , Zhao, H. , Zeng, J. et al. Insight into the depressurization-assisted flue gas replacement behavior with the artificial hydrate-bearing clay-silt sediment containing organic matter [J]. | Energy , 2024 , 308 . |
| MLA | Mu, L. et al. "Insight into the depressurization-assisted flue gas replacement behavior with the artificial hydrate-bearing clay-silt sediment containing organic matter" . | Energy 308 (2024) . |
| APA | Mu, L. , Zhao, H. , Zeng, J. , Zhu, X. , Lai, J. , Cui, Q. . Insight into the depressurization-assisted flue gas replacement behavior with the artificial hydrate-bearing clay-silt sediment containing organic matter . | Energy , 2024 , 308 . |
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Natural rectorite modified by the hydrothermal method was employed to prepare a catalyst for the slurry-phase hydrocracking of vacuum residue (VR). The influence of hydrothermal treatment on the properties of rectorite and the performance of the corresponding catalyst was examined. Hydrothermal treatment of the rectorite led to the formation of Fe3O4, as evidenced by H2-TPR analysis. XPS results indicate that the hydrothermal treatment of rectorite can intensify the sulfidation process of Mo species supported on it, possibly due to modifications in the surface properties of the rectorite. Comparative slurry-phase hydrocracking tests showed that the catalyst supported on hydrothermally treated rectorite exhibited significantly higher VR conversion, higher liquid product yield, and higher yields of gasoline and diesel fractions, but lower gas yield compared to the catalyst supported on untreated rectorite. This is ascribed to the high hydrogenation activity of the catalyst supported on hydrothermally treated rectorite, which effectively suppresses the over-cracking reactions of intermediate products that would otherwise produce gas, illustrating the process intensification achieved through hydrothermal treatment. © 2024 Elsevier B.V.
Keyword ：
Hydrocracking Hydrocracking Hydrothermal treatment Hydrothermal treatment Mo catalyst Mo catalyst Sulfidation Sulfidation Vacuum residue Vacuum residue
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| GB/T 7714 | Cui, Q. , Yan, J. , Zhang, H. et al. Hydrothermal treatment of natural rectorite enhanced Mo sulfidation for slurry-phase hydrocracking of vacuum residue [J]. | Chemical Engineering and Processing - Process Intensification , 2024 , 205 . |
| MLA | Cui, Q. et al. "Hydrothermal treatment of natural rectorite enhanced Mo sulfidation for slurry-phase hydrocracking of vacuum residue" . | Chemical Engineering and Processing - Process Intensification 205 (2024) . |
| APA | Cui, Q. , Yan, J. , Zhang, H. , Feng, W. , Yue, Y. , Li, T. et al. Hydrothermal treatment of natural rectorite enhanced Mo sulfidation for slurry-phase hydrocracking of vacuum residue . | Chemical Engineering and Processing - Process Intensification , 2024 , 205 . |
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To gain a profound understanding of the reaction pathway and the controlling step of residue oil slurry-phase hydrocracking over Fe2O3 catalyst, a six-lumped kinetic model was proposed and employed to acquire the kinetic rate constants based on each fraction yield obtained at 400 to 420 °C under initial H2 pressures of 8 to 10 MPa for 1 to 3 h. The optimal kinetic rate constant for each step of vacuum residue (VR) conversion process was determined via Levenberg-Marquardt algorithm and the sum of squares error (SSE). The results reveal that VR converted into naphtha and diesel is dominant according to their kinetic rate constants, followed by the conversion of vacuum gas oil (VGO) to diesel, diesel to naphtha, and diesel to gas. Furthermore, the sensitivity analysis confirms a strong agreement between the predicted and experimental values. The combination of kinetic rate constants and activation energy illustrates that the gas product primarily originates from naphtha. Additionally, the higher H2 pressure effectively mitigates coke deposition by restricting the aggregation of polycyclic aromatics, as evidenced by the increase in the reaction activation energy for the conversion of VR to coke and the analysis of the used catalyst. © 2024 Elsevier Ltd
Keyword ：
Activation analysis Activation analysis Activation energy Activation energy Catalysts Catalysts Coke Coke Hematite Hematite Hydrocracking Hydrocracking Kinetic parameters Kinetic parameters Kinetic theory Kinetic theory Naphthas Naphthas Rate constants Rate constants Sensitivity analysis Sensitivity analysis
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| GB/T 7714 | Cui, Qingyan , Zheng, Bin , Wang, Boshi et al. Kinetics study on residue oil slurry-phase hydrocracking with Fe2O3 catalyst [J]. | Fuel , 2024 , 374 . |
| MLA | Cui, Qingyan et al. "Kinetics study on residue oil slurry-phase hydrocracking with Fe2O3 catalyst" . | Fuel 374 (2024) . |
| APA | Cui, Qingyan , Zheng, Bin , Wang, Boshi , Yan, Jianteng , Liu, Jiangyong , Li, Tiesen et al. Kinetics study on residue oil slurry-phase hydrocracking with Fe2O3 catalyst . | Fuel , 2024 , 374 . |
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