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Di Lu, Qin Tang, Dehuan Yang, Rongtao Yan, Yun Chen and Shuai Tao
Stability condition is of critical importance for methane hydrate exploitation, transportation, and reserves. This study measured the stability conditions of methane hydrate in fine-grained sediment with different dry densities (ρd" role="prese...
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Ziv Tayber, Aaron Meilijson, Zvi Ben-Avraham and Yizhaq Makovsky
To estimate the potential inventory of natural gas hydrates (NGH) in the Levant Basin, southeastern Mediterranean Sea, we correlated the gas hydrate stability zone (GHSZ), modeled with local thermodynamic parameters, with seismic indicators of gas. A com...
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Jacek Majorowicz, Kirk Osadetz and Jan Safanda
We model numerically regions of the Canadian continental shelves during successive glacio-eustatic cycles to illustrate past, current and future marine gas hydrate (GH) stability and instability. These models indicated that the marine GH resource has dyn...
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Marcelo Ketzer, Daniel Praeg, Maria A.G. Pivel, Adolpho H. Augustin, Luiz F. Rodrigues, Adriano R. Viana and José A. Cupertino
Gas hydrate provinces occur in two sedimentary basins along Brazil?s continental margin: (1) The Rio Grande Cone in the southeast, and (2) the Amazon deep-sea fan in the equatorial region. The occurrence of gas hydrates in these depocenters was first det...
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Evgeny Chuvilin, Dinara Davletshina, Valentina Ekimova, Boris Bukhanov, Natalia Shakhova and Igor Semiletov
Destabilization of intrapermafrost gas hydrates is one of the possible mechanisms responsible for methane emission in the Arctic shelf. Intrapermafrost gas hydrates may be coeval to permafrost: they originated during regression and subsequent cooling and...
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Evgeny Chuvilin, Valentina Ekimova, Boris Bukhanov, Sergey Grebenkin, Natalia Shakhova and Igor Semiletov
Destabilization of intrapermafrost gas hydrate is one possible reason for methane emission on the Arctic shelf. The formation of these intrapermafrost gas hydrates could occur almost simultaneously with the permafrost sediments due to the occurrence of a...
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Kyoichi Tezuka, Tatsuhiko Taguchi, Saman Alavi, Amadeu K. Sum and Ryo Ohmura
This paper report analyses of thermodynamic stability of structure-H clathrate hydrates formed with methane and large guest molecules in terms of their gas phase molecular sizes and molar masses for the selection of a large guest molecule providing bette...
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Tatiana V. Matveeva, Valery D. Kaminsky, Anastasiia A. Semenova and Nikolai A. Shchur
The key factors controlling the formation and dynamics of relicpermafrost and the conditions for the stability of associated gas hydrates have been investigated using numerical modeling in this work. A comparison was made between two scenarios that diffe...
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Ahmed A. Ibrahim, Ashraf Amin, Ahmed S. Al-Fatesh, Nadavala Siva Kumar, Samsudeen Olajide Kasim, Abdulrhman S. Al-Awadi, Ahmed M. El-Toni, Ahmed Elhag Abasaeed and Anis H. Fakeeha
Ni, Co, and Co?Ni bimetallic catalysts supported over SBA-15 and over SBA-15 doped with Zn or Ce oxides were prepared and tested in a methane dry reforming reaction. The loading of the metals in the catalyst was 5 wt % for either mono or bimetallic catal...
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Attila R. Imre, Axel Groniewsky, Gábor Györke, Adrienn Katona, Dávid Velmovszki
Pág. 276 - 285
Recent results are shown about the peculiarities of the pseudo-critical region, with special emphasis on properties important for energy production and conversion. The property-map of some materials, which are relevant as model fluids or as working / coo...
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Michael Adedeji, Muhammad Abid, Humphrey Adun, Ayomide Titus Ogungbemi, David Alao and Juliana Hj Zaini
A combined heat and power (CHP) system powered by methane gas is modelled and analyzed in this study. The Thermolib MATLAB extension is used to model the system by graphically connecting the Thermolib standard components through fluid flows. An exergoenv...
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Gang Li, Fugui Tang, Chaofan Li, Wen Lei and Ying Liu
Gas hydrate is seen as a kind of new energy resources, yet it may also be one of the main greenhouse gases as its dissociation may release methane into the atmosphere. Furthermore, a severe hazard to offshore infrastructures may also be introduced by ext...
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Keqi Bei, Tianfu Xu, Songhua Shang, Zilin Wei, Yilong Yuan and Hailong Tian
The formation of marine gas hydrates is controlled by gas migration and accumulation from lower sediments and by the conditions of the hydrate stability zone. Permeability and porosity are important factors to evaluate the gas migration capacity and rese...
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Claudio Argentino, Stefano Conti, Chiara Fioroni and Daniela Fontana
The occurrence of seep-carbonates associated with shallow gas hydrates is increasingly documented in modern continental margins but in fossil sediments the recognition of gas hydrates is still challenging for the lack of unequivocal proxies. Here, we com...
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Pinggui Wang, Xiuhua Fu, Des Gibson, Lewis Fleming, Sam Ahmadzadeh, Cheng Li, Manu Muhiyudin, Shigeng Song, David Hutson, David Moodie, Calum MacGregor and Matthew Steer
In this work, performance improvements are described for a low-power consumption non-dispersive infrared (NDIR) methane (CH4) gas sensor using customised optical thin film bandpass filters (BPFs) centered at 3300 nm. BPFs shape the spectral characteristi...
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Solmaz Aslanzadeh, Karthik Rajendran, Azam Jeihanipour and Mohammad J. Taherzadeh
The effect of recirculation in increasing organic loading rate (OLR) and decreasing hydraulic retention time (HRT) in a semi-continuous two-stage anaerobic digestion system using stirred tank reactor (CSTR) and an upflow anaerobic sludge bed (UASB) was e...
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Yanghui Li, Yongchen Song, Weiguo Liu and Feng Yu
The mechanical properties of methane hydrate are important to the stability of borehole and methane extraction from a methane hydrate reservoir. In this study, a series of triaxial compression tests were carried out on laboratory-formed methane hydrate-i...
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Kaihua Xue, Jiafei Zhao, Yongchen Song, Weiguo Liu, Weihaur Lam, Yiming Zhu, Yu Liu, Chuanxiao Cheng and Di Liu
The porous microstructure of hydrates governs the mechanical strength of the hydrate-bearing sediment. To investigate the growth law and microstructure of hydrates in porous media, the growth process of tetrahydrofuran (THF) hydrate under different conce...
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Klaus Wallmann, Elena Pinero, Ewa Burwicz, Matthias Haeckel, Christian Hensen, Andrew Dale and Lars Ruepke
The accumulation of methane hydrate in marine sediments is controlled by a number of physical and biogeochemical parameters including the thickness of the gas hydrate stability zone (GHSZ), the solubility of methane in pore fluids, the accumulation of pa...
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Sara Bonuso, Pasquale Di Gloria, Guido Marseglia, Ramón A. Otón Martínez, Ghazanfar Mehdi, Zubair Ali Shah, Antonio Ficarella and Maria Grazia De Giorgi
This study introduces an innovative approach involving the injection of hydrogen into a low-swirl, non-premixed flame, which operates with gaseous fuels derived from an air-blast atomizer designed for aero-engine applications. The aim is to characterize ...
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