Decomposition of methane hydrates in sand, sandstone,
11.05.2004· Decomposition of methane hydrates in sand, sandstone, clays, and glass beads 1. Introduction. However, even if a bottom-simulating reflector (BSR) is used in the field to estimate the depth and... 2. Experimental Procedures. For sediment minerals, we included silica sands, sandstones,Decomposition of methane hydrates in sand, sandstone,,11.05.2004· [1] Decomposition conditions of methane hydrates in sediments were measured during formation‐decomposition cycles. As test sediments, we used silica sand, sandstone, and clays (kaoline and bentonite), which are typical natural materials known as hydrate bearing sediments, and the range of samples cover a range of water saturating abilities.Decomposition of methane hydrates in sand, sandstone,,Decomposition of methane hydrates in sand, sandstone, clays, and glass beads Tsutomu Uchida,1 Satoshi Takeya,2 Evgene M. Chuvilin,3 Ryo Ohmura,2 Jiro Nagao,2 Vladimir S. Yakushev,4 Vladimir A. Istomin,4 Hideki Minagawa,2 Takao Ebinuma,2 and Hideo Narita2 Received 30 August 2003; revised 24 February 2004; accepted 5 March 2004; published 11 May 2004.Decomposition of methane hydrates in sand, sandstone,,10.05.2004· Decomposition conditions of methane hydrates in sediments were measured during formation-decomposition cycles. As test sediments, we used silica sand, sandstone, and clays (kaoline and bentonite), which are typical natural materials known as hydrate bearing sediments, and the range of samples cover a range of water saturating abilities. To better understand the results, we also used uniformly sized glass beads. Pore effects on decompositionDecomposition of methane hydrates in sand, sandstone,,Decomposition conditions of methane hydrates in sediments were measured during formation-decomposition cycles. As test sediments, we used silica sand, sandstone, and claysDecomposition of methane hydrates in sand, sandstone,,01.05.2004· Decomposition of methane hydrates in sand, sandstone, clays, and glass beads Uchida, Tsutomu Takeya, Satoshi Chuvilin, Evgene M. Ohmura, Ryo Nagao, Jiro Yakushev, Vladimir S. Istomin, Vladimir A. Minagawa, Hideki Ebinuma, Takao Narita, Hideo
Decomposition Of Methane Hydrates In Sand
Microscopic measurements on the decomposition behaviour of methane hydrates formed in natural sands. Long Wen abc Xuebing Zhou ab and Deqing Liang ab a CAS Key Laboratory of Gas Hydrate Guanghou Institute of Energy Conversion Guanghou Center for Gas Hydrate Research Chinese Academy of Sciences Guanghou 510640 China. Email liangdqms.giec.ac.cn b GuangdongMicroscopic measurements on the decomposition,decomposition time for hydrate formed in sands did not decrease with the decrease in particle size. The shortest decomposition time was observed for the sands with the particle size range of 38–55 mm, which was less than 30 minutes. Moreover methane hydrate was found to decompose faster in the porous medium containing 3.5 wt% NaCl, which suggested that there was almost no self-preservation effect. In situ Raman measurements showed that the integrated intensity ratio of methaneStudy on the decomposition conditions of gas hydrate in,,01.04.2019· The decomposition pressures of methane hydrate in 20–40 and 80–100 mesh are in the same range as for the 60–80 mesh quartz sand. The first measured decomposition pressures for methane hydrate in 20–40, 60–80, and 80–100 mesh quartz sand were 3.82 MPa, 3.77 MPa, and 3.78 MPa, respectively. This implies that there was only a small difference in hydrate dissociation pressureDecomposition of methane hydrates in sand, sandstone,,Decomposition conditions of methane hydrates in sediments were measured during formation-decomposition cycles. As test sediments, we used silica sand, sandstone, and clays (kaoline and bentonite), which are typical natural materials known as hydrate bearing sediments, and the range of samples cover a range of water saturating abilities.Decomposition of methane hydrates in sand, sandstone,,Decomposition of methane hydrates in sand, sandstone, clays, and glass beads . By Tsutomu Uchida, Satoshi Takeya, Evgene M. Chuvilin, Ryo Ohmura, Jiro Nagao, Vladimir S. Yakushev, Vladimir A. Istomin, Hideki Minagawa, Takao Ebinuma and Hideo Narita. Cite . BibTex; Full citation ; Publisher: American Geophysical Union (AGU) Year: 2004. DOI identifier: 10.1029/2003jb002771. OAI identifier,Microscopic measurements on the decomposition,Microscopic measurements on the decomposition behaviour of methane hydrates formed in natural sands†. Long Wen abc, Xuebing Zhou ab and Deqing Liang * ab a CAS Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China. E-mail: [email protected] b Guangdong
Microscopic measurements on the decomposition behaviour
behaviour of methane hydrates formed in natural sands† Long Wen,abc Xuebing Zhouab and Deqing Liang *ab In this work, the decomposition behaviour of methane hydrate in porous media was investigated microscopically using powder X-ray diffraction, cryogenic scanning electron microscopy and in situ Raman spectroscopy. The effect of grain sizes on the decomposition of methane hydrateDECOMPOSITION OF METHANE HYDRATE IN QUARTZ,In order to obtain the decomposition properties of in-situ hydrate, this study carried out a lab test investigating on the decomposition of methane hydrate in sands, between 20 to 40 mesh, by injecting hot water at atmospheric pressure. The test showed that electric resistance, just like temperature, is an excellent indication index for the formation and decomposition of methane hydrate, i. e,Decomposition of methane hydrates in sand, sandstone,,Decomposition of methane hydrates in sand, sandstone, clays, and glass beads View 0 peer reviews of Decomposition of methane hydrates in sand, sandstone, clays, and glass beads on Publons Download Web of Science™ My Research Assistant : Bring the power of the Web of Science to your mobile device, wherever inspiration strikes.METHANE HYDRATE FORMATION AND DECOMPOSITION,15.04.2009· Methane hydrates are found in sandy sediments at the bottom of oceans all around the margins of continents at great depths of 300–3000 m, at temperatures of 0–20 C (Fig. 2b), and under permafrost in arctic regions. A liter of sediment yields 10 to 50 liters of methane gas. Thus, methane hydrate deposits constitute a potentially enormous natural gas resource, if the gas could be extracted,Decomposition conditions of methane hydrate in,15.04.2016· Uchida et al. measured the decomposition conditions of methane hydrate in sediments. The silica sand, sandstone, and clays (kaoline and bentonite) were used in the experiments. They concluded that the decomposition conditions are affected mainly by the pore sizes. The results indicated that hydrates form not only between the particles but also in the interlayer of the bentonite. Saw et al,Experimental investigation of methane hydrate,,01.05.2010· Using this device, the formation and decomposition behavior of methane hydrate in the 20∼40 mesh natural sand with salinity of 3.35 wt% was examined. It was found that the front of formation or decomposition of hydrate can be judged by the temperature distribution. The amount of hydrate formation can also be evaluated by the temperature change. During the hydrate decomposition
Formation and Dissociation Kinetics of Methane
Methane gas hydrate formation and dissociation kinetics were studied in Toyoura sand (100–500 μm) with pure water at 8 MPa (driving force of 4.2 MPa) and seawater at 8 and 10 MPa (driving force of 6.2 MPa) and a temperature of 277.15 K. For the present work, 3.03 wt % saline seawater obtained from Pulau Tekong (Singapore) is used. The methane hydrate formation kinetics in Toyoura sand and,Decomposition of methane hydrates in sand, sandstone,,Title Decomposition of methane hydrates in sand, sandstone, clays and glass beads Author(s) Uchida, Tsutomu; Takeya, Satoshi; Chuvilin, Evgene M.; Ohmura, Ryo; Nagao, Jiro; Yakushev, Vladimir S.; Istomin, Vladimir A.; Minagawa, Hideki; Ebinuma, Takao; Narita, Hideo Citation Journal of Geophysical Research - Solid Earth (Chemistry and Physics of Minerals and Rocks/Volcanology),Decomposition of methane hydrates in sand, sandstone,,Decomposition conditions of methane hydrates in sediments were measured during formation-decomposition cycles. As test sediments, we used silica sand, sandstone, and clays (kaoline and bentonite), which are typical natural materials known as hydrate bearing sediments, and the range of samples cover a range of water saturating abilities.decomposition of methane hydrates in sand,Abstract Decomposition conditions of methane hydrates in sediments were measured during formation-decomposition cycles. As test sediments, we used silica sand, sandstone, and clays (kaoline and bentonite), which are typical natural materials known as hydrate bearing sediments, and the range of samples cover a range of waterDecomposition of methane hydrates in sand, sandstone,,Pore effects on decomposition of these materials were investigated by analyzing the pore-space distributions of the materials and by varying the initial water content of the samples. The results obtained for sand and sandstone samples indicated that the final decomposition temperatures were shifted lower than those for bulk hydrates at the same pressure. Temperature shifts were more negative,DECOMPOSITION OF METHANE HYDRATE IN QUARTZ,In order to obtain the decomposition properties of in-situ hydrate, this study carried out a lab test investigating on the decomposition of methane hydrate in sands, between 20 to 40 mesh, by injecting hot water at atmospheric pressure. The test showed that electric resistance, just like temperature, is an excellent indication index for the formation and decomposition of methane hydrate, i. e,
KINETICS OF HYDRATE FORMATION AND
Kinetics of hydrate formation and decomposition of methane hydrate formed in silica sand particles were studied in detail at three temperatures of 7.0, 4.0 and 1.0°C, respectively. A new apparatus was setup to study the decomposition behavior of the methane hydrate formed in the bed of silica sand particles. Six thermocouples are placed in different locations to study the temperature profiles,Decomposition of methane hydrates in sand, sandstone,,11.05.2004· On the other hand, for bentonite particles, the results indicated that methane hydrates formed not only between the particles but also in the interlayers. A thermodynamic promoting effect was found for dilute bentonite solutions, although the positive decomposition-temperature shift was at most +0.5 K. 人気論文. 論文. 著者. Decomposition of methane hydrates in sand, sandstone, clays,Simulation of the Decomposition of Natural Gas Hydrate in,,methane hydrate decomposition in quartz sand and the calculation and experimental results were compared. 2. EXPERIMENTAL 2.1. Apparatus and materials Fig. 1 shows the experimental apparatus for methane hydrate formation and decomposition. The main part of the experimental system is a cell with internal dimensions of 36x200 mm mm. The maximum operating pressure is 20 MPa. The cell isFormation, dissolution, and decomposition of gas,01.04.2021· Experiments in laboratory were conducted by Kim et al. (1987) to study the kinetics of methane hydrate decomposition. The analysis of the data indicated the decomposition depending on pressure, temperature, and particle surface area. Based on this relation, an intrinsic model for the hydrate decomposition was developed.Experimental research on methane hydrate formation in,,27.05.2021· In the experiment, three kinds of sandy soil tests with various particle sizes and starting water substances were chosen for analysis of methane hydra…,
