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Hydrate storage and transportation method suitable for zero DEG C or above

A zero-degree Celsius, hydrate technology, applied in the field of hydrate storage and transportation above zero degrees Celsius, to achieve the effect of strengthening the self-protection effect, inhibiting the decomposition process, and realizing the effect of safe storage and transportation of gas

Active Publication Date: 2020-09-25
XIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is no relevant report on how to improve the self-protection effect above zero degrees Celsius

Method used

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  • Hydrate storage and transportation method suitable for zero DEG C or above
  • Hydrate storage and transportation method suitable for zero DEG C or above
  • Hydrate storage and transportation method suitable for zero DEG C or above

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Embodiment 1

[0022] Embodiment 1 of the present invention is: a method for storage and transportation of hydrates, adding heavy water to the hydrate formation system (methane-water), and after the hydrates are formed, the pressure is discharged to the storage and transportation pressure through exhaust to maintain Keep container tightly closed. The structural schematic diagram of the container is as figure 1 Shown, specifically comprise vacuum pump 2, autoclave, gas cylinder 17 and computer 16, autoclave comprises the first autoclave 6 and the second autoclave 7 that communicate with each other, and autoclave is positioned at the ethylene glycol water bath 8 that is used for temperature control Among them, the first autoclave 6 is connected with the vacuum pump 2, and the second autoclave 7 is connected with the gas cylinder 17. The first autoclave 6 is provided with a first pressure sensor 11 and a first temperature sensor 13, and the second autoclave 7 is provided with a There is a seco...

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PUM

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Abstract

The invention discloses a hydrate storage and transportation method suitable for zero DEG C or above. The method comprises the following steps that molecules capable of strengthening the self-protection effect at zero DEG C or above are added into a hydrate forming system, and after hydrates are formed, the pressure is adjusted and controlled for storage and transportation, wherein the adding proportion of the molecules capable of strengthening the self-protection effect at zero DEG C or above is 30 % or above. According to the scheme, by starting with host molecules, the self-protection effect is ingeniously improved to zero DEG C or above; the hydrate forming process is the same as a traditional hydrate forming process, however, in the hydrate decomposition process, due to doping or change of the host molecules, the hydrate decomposition process is inhibited; and the change of main water phases can strengthen the self-protection effect of the hydrates, and then the hydrate decomposition process is inhibited; and the main water phases of the scheme can comprise heavy water and other substances possibly forming the hydrates or similar hydrates, and when the temperature is higher than 273.2 K, the self-protection effect can be generated, and the cold energy required in the hydrate method gas storage process is reduced.

Description

technical field [0001] The invention relates to the field of hydrate gas storage and related technologies, in particular to a method suitable for storage and transportation of hydrate above zero degrees Celsius. Background technique [0002] Gas hydrate refers to an ice-like non-stoichiometric cage compound formed by small molecule gas and water under low temperature and high pressure. According to the characteristics of gas hydrates wrapping small molecular gases, gas storage and transportation can be carried out by forming hydrates. Taking methane hydrate as an example, 1 volume of methane hydrate can store more than 150 volumes of methane gas. It exists stably at a temperature of 263.2K to 282.2K and a pressure of 6.5MPa, and its storage pressure is much lower than that of compressed natural gas (20MPa to 30MPa). However, to reduce the pressure of methane hydrate storage, it is usually adopted to reduce the phase equilibrium conditions for hydrate formation by adding th...

Claims

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Application Information

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IPC IPC(8): F17C1/00F17C13/00F17C13/04C10L3/10
CPCF17C1/00F17C13/002F17C13/04C10L3/108F17C2205/0323F17C2221/03F17C2221/032F17C2223/0153F17C2223/03F17C2223/035Y02E60/32
Inventor 陈俊曾耀松陈光进雷艳华蒋建宏邓斌李家元
Owner XIANGNAN UNIV