Prediction of Dissociation Pressures of Mixed Gas Hydrates from Data for Hydrates of Pure Gases with Water

1966 ◽  
Vol 5 (4) ◽  
pp. 466-469 ◽  
Author(s):  
Isamu Nagata ◽  
Riki Kobayashi
2021 ◽  
Vol 128 ◽  
pp. 105024
Author(s):  
Jiangong Wei ◽  
Tingting Wu ◽  
Linqi Zhu ◽  
Yunxin Fang ◽  
Jinqiang Liang ◽  
...  

2021 ◽  
Vol 3 (144) ◽  
pp. 22-31
Author(s):  
Viktor S. Grigor’yev ◽  
◽  
Il’ya V. Romanov

The ability of gas hydrates to concentrate gas into a solid chelate structure and the properties of self-preservation of gas hydrates at negative temperatures allows us to consider the possibility of developing a method for the utilization of biogas, environmentally safe storage and transportation of biomethane. (Research purpose) The research purpose is in substantiation the technological possibilities of obtaining synthetic mixed gas hydrates of biogas components, their storage and transportation based on the analysis of the existing regularities of the formation of gas hydrates in time, temperature and external pressure. (Materials and methods) The article presents the accumulated results of studies of the process of obtaining artificial hydrates of natural gas and methane- containing gas mixtures at various initial static pressures and temperatures. The object of research to substantiate the parameters of artificial creation of gas hydrates is biogas obtained during anaerobic thermophilic fermentation of organic waste at an existing experimental biogas plant. Mixed feed SK-8 with a humidity of 90-92 percent was used as an organic substrate of constant composition. The composition of biogas was studied using the Optima-7 Biogas gas analyzer. (Results and discussion) The article presents a process model and a technical appearance of an installation for producing gas motor fuel from the biogas of anaerobic digestion of organic waste of the agro-industrial complex. The hydrate formation time depends on the increase in the interfacial surface and the movement of gas bubbles relative to the liquid, which can be regulated by acting on the hydrate formation zone (shock wave, electromagnetic, mechanical, chemical, temperature). (Conclusions) The research results can be used in modeling processes in two-phase media during the formation of gas hydrates and the creation of installations for their production.


2014 ◽  
Vol 28 (11) ◽  
pp. 6877-6888 ◽  
Author(s):  
Barbara Sowa ◽  
Xue Hua Zhang ◽  
Patrick G. Hartley ◽  
Dave E. Dunstan ◽  
Karen A. Kozielski ◽  
...  

2006 ◽  
Vol 115 (1-4) ◽  
pp. 279-282 ◽  
Author(s):  
Jeasung Park ◽  
Yu-Taek Seo ◽  
Jong-won Lee ◽  
Huen Lee

Entropy ◽  
2020 ◽  
Vol 22 (7) ◽  
pp. 710
Author(s):  
Sergey Y. Misyura ◽  
Andrey Yu. Manakov ◽  
Galina S. Nyashina ◽  
Olga S. Gaidukova ◽  
Vladimir S. Morozov ◽  
...  

Experiments on the dissociation of a mixed gas hydrate in various combustion methods are performed. The simultaneous influence of two determining parameters (the powder layer thickness and the external air velocity) on the efficiency of dissociation is studied. It has been shown that for the mixed hydrate, the dissociation rate under induction heating is 10–15 times higher than during the burning of a thick layer of powder, when the combustion is realized above the layer surface. The minimum temperature required for the initiation of combustion for different combustion methods was studied. As the height of the sample layer increases, the rate of dissociation decreases. The emissions of NOx and CO for the composite hydrate are higher than for methane hydrate at the same temperature in a muffle furnace. A comparison of harmful emissions during the combustion of gas hydrates with various types of coal fuels is presented. NOx concentration as a result of the combustion of gas hydrates is tens of times lower than when burning coal fuels. Increasing the temperature in the muffle furnace reduces the concentration of combustion products of gas hydrates.


2006 ◽  
Vol 110 (23) ◽  
pp. 11468-11474 ◽  
Author(s):  
Judith M. Schicks ◽  
Rudolf Naumann ◽  
Jörg Erzinger ◽  
Keith C. Hester ◽  
Carolyn A. Koh ◽  
...  

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