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Smirnov VG, Dyrdin VV, Manakov AY, Ismagilov ZR. Decomposition of carbon dioxide hydrate in the samples of natural coal with different degrees of metamorphism. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2019.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhang W, Fan S, Wang Y, Lang X, Guo K, Chen J. Evidence for pore-filling gas hydrates in the sediments through morphology observation. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2019.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cheng C, Wang F, Zhang J, Qi T, Jin T, Zhao J, Zheng J, Li L, Li L, Yang P, Lv S. Cyclic Formation Stability of 1,1,1,2-Tetrafluoroethane Hydrate in Different SDS Solution Systems and Dissociation Characteristics Using Thermal Stimulation Combined with Depressurization. ACS OMEGA 2019; 4:11397-11407. [PMID: 31460244 PMCID: PMC6682015 DOI: 10.1021/acsomega.9b01187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/11/2019] [Indexed: 06/10/2023]
Abstract
Cold storage using hydrates for cooling is a high-efficiency technology. However, this technology suffers from problems such as the stochastic nature of hydrate nucleation, cyclic hydrate formation instability, and a low cold discharge rate. To solve these problems, it is necessary to further clarify the characteristics of hydrate formation and dissociation in different systems. First, a comparative experimental study in pure water and sodium dodecyl sulfate (SDS) solution systems was conducted to explore the influence of SDS on the morphology of the hydrate and the time needed for its formation under visualization conditions. Subsequently, the cyclic hydrate formation stability was investigated at different test temperatures with two types of SDS solution systems-with or without a porous medium. The induction time, full time, and energy consumption time ratio of the first hydrate formation process and the cyclic hydrate reformation process were analyzed. Finally, thermal stimulation combined with depressurization was used to intensify hydrate dissociation compared with single thermal stimulation. The results showed that the growth morphology of hydrate and the time required for its formation in the SDS solution system were obviously different than those in pure water. In addition, the calculation and comparison results revealed that the induction time and full time of cyclic hydrate reformation were shorter and the energy consumption time ratio was smaller in the porous medium. The results indicated that a porous medium could improve the cyclic hydrate formation process by making it more stable and by decreasing time and energy costs. Thermal stimulation combined with depressurization at different backpressures (0.1, 0.2, 0.3, and 0.4 MPa) effectively promoted the decomposition of hydrates, and with the decrease in backpressure, the dissociation time decreased gradually. At a backpressure of 0.1 MPa, the dissociation time was reduced by 150 min. The experimental results presented the formation and dissociation characteristics of 1,1,1,2-tetrafluoroethane hydrates in different systems, which could accelerate the application of gas hydrates in cold storage.
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Affiliation(s)
- Chuanxiao Cheng
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Fan Wang
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Jun Zhang
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Tian Qi
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Tingxiang Jin
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Jiafei Zhao
- Key
Laboratory of Ocean Energy Utilization and Energy Conservation of
Ministry of Education, Dalian University
of Technology, Dalian 116024, China
| | - Jili Zheng
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Lingjuan Li
- Henan
Muxiang Veterinary Pharmaceutical Company Limited, Zhengzhou 450000 China
| | - Lun Li
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Penglin Yang
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
| | - Shuai Lv
- School
of Energy and Power Engineering, Zhengzhou
University of Light Industry, Zhengzhou 450002, China
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Song G, Li Y, Wang W, Zhao P, Jiang K, Ye X. Experimental study of hydrate formation in oil–water systems using a high‐pressure visual autoclave. AIChE J 2019. [DOI: 10.1002/aic.16667] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Guangchun Song
- Shandong Key Laboratory of Oil‐Gas Storage and Transportation SafetyChina University of Petroleum Qingdao Shandong People's Republic of China
| | - Yuxing Li
- Shandong Key Laboratory of Oil‐Gas Storage and Transportation SafetyChina University of Petroleum Qingdao Shandong People's Republic of China
| | - Wuchang Wang
- Shandong Key Laboratory of Oil‐Gas Storage and Transportation SafetyChina University of Petroleum Qingdao Shandong People's Republic of China
| | - Pengfei Zhao
- SINOPEC Star Petroleum Co., Ltd. Beijing People's Republic of China
| | - Kai Jiang
- Shandong Key Laboratory of Oil‐Gas Storage and Transportation SafetyChina University of Petroleum Qingdao Shandong People's Republic of China
| | - Xiao Ye
- Shandong Key Laboratory of Oil‐Gas Storage and Transportation SafetyChina University of Petroleum Qingdao Shandong People's Republic of China
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7
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Non-Embedded Ultrasonic Detection for Pressure Cores of Natural Methane Hydrate-Bearing Sediments. ENERGIES 2019. [DOI: 10.3390/en12101997] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An apparatus for the analysis of pressure cores containing gas hydrates at in situ pressures was designed, and a series of experiments to determine the compressional wave response of hydrate-bearing sands were performed systematically in the laboratory. Considering the difficulties encountered in performing valid laboratory tests and in recovering intact hydrate bearing sediment samples, the laboratory approach enabled closer study than the marine environment due to sample recovery problems. The apparatus was designed to achieve in situ hydrate formation in bearing sediments and synchronous ultrasonic detection. The P-wave velocity measurements enabled quick and successive ultrasonic analysis of pressure cores. The factors influencing P-wave velocity (Vp), including hydrate saturation and formation methodology, were investigated. By controlling the initial water saturation and gas pressure, we conducted separate experiments for different hydrate saturation values ranging from 2% to 60%. The measured P-wave velocity varied from less than 1700 m/s to more than 3100 m/s in this saturation range. The hydrate saturation can be successfully predicted by a linear fitting of the attenuation (Q−1) to the hydrate saturation. This approach provided a new method for acoustic measurement of the hydrate saturation when the arrival time of the first wave cannot be directly distinguished. Our results demonstrated that the specially designed non-embedded ultrasonic detection apparatus could determine the hydrate saturation and occurrence patterns in pressure cores, which could assist further hydrate resource exploration and detailed core analyses.
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Shi BH, Chai S, Ding L, Chen YC, Liu Y, Song SF, Yao HY, Wu HH, Wang W, Gong J. An investigation on gas hydrate formation and slurry viscosity in the presence of wax crystals. AIChE J 2018. [DOI: 10.1002/aic.16192] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Bo-Hui Shi
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
| | - Shuai Chai
- Sinopec Engineering Incorporation; Beijing 100101 China
| | - Lin Ding
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
| | - Yu-Chuan Chen
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
| | - Yang Liu
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
| | - Shang-Fei Song
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
| | - Hai-Yuan Yao
- Key Lab of Deepwater Engineering; CNOOC Research Institute Co. Ltd.; Beijing 100028 China
| | - Hai-Hao Wu
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
| | - Wei Wang
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
| | - Jing Gong
- National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology; China University of Petroleum-Beijing; Changping, Beijing 102249 China
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Yuhara D, Brumby PE, Wu DT, Sum AK, Yasuoka K. Analysis of three-phase equilibrium conditions for methane hydrate by isometric-isothermal molecular dynamics simulations. J Chem Phys 2018; 148:184501. [DOI: 10.1063/1.5016609] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Daisuke Yuhara
- Department of Mechanical Engineering, Keio University, 3-4-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Paul E. Brumby
- Department of Mechanical Engineering, Keio University, 3-4-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - David T. Wu
- Chemistry Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - Amadeu K. Sum
- Hydrates Energy Innovation Lab, Chemical and Biological Engineering Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - Kenji Yasuoka
- Department of Mechanical Engineering, Keio University, 3-4-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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