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Method for storing natural gas hydrate

A natural gas and hydrate technology, applied in gas fuel, petroleum industry, fuel and other directions, can solve the problems of poor density recovery, slow hydrate formation rate, and high gas storage capacity, achieve good density, reduce storage and transportation costs, increase safety effect

Active Publication Date: 2019-04-16
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with compressed natural gas and liquefied natural gas, natural gas hydrate is used to store and transport natural gas. Compared with compressed natural gas and liquefied natural gas, its gas storage capacity is high. Although the preparation conditions are relatively mild, the formation rate of natural gas hydrate is slow, the density is poor, and water recovery needs to be considered.

Method used

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  • Method for storing natural gas hydrate

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Experimental program
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Effect test

Embodiment 1

[0037] Using columnar chromatography silica gel with a pore size of about 20nm and a particle size of about 0.1-0.3mm, distilled water and methane gas as experimental materials, the above-mentioned steps are used to synthesize, store and decompose methane hydrate samples for natural gas hydrate storage and transportation tests experiment.

[0038] To synthesize aqueous columnar chromatography silica gel, mix the same amount of water as the pore volume of columnar chromatography silica gel with columnar chromatography silica gel, fully mix and stir. Seal and stand for 5 days to ensure that the distilled water is absorbed by the pores of the column chromatography silica gel. Aqueous column chromatography silica gel is put into the reaction kettle. Remove the air in the reactor and pipeline by vacuuming. The temperature of the reactor is lowered below the equilibrium point of the hydrate phase, and has a supercooling degree above 5K, and at the same time, the gas in the buffer ...

Embodiment 2

[0043] With a thickness of 0.55-1.2nm, a diameter of 0.5-3μm, and a specific surface area of ​​200-480m 2 .g –1 , pore volume 1.3cm 3 .g –1 The three-dimensional porous graphene oxide, distilled water and methane gas are used as experimental materials, and the method steps of the invention are used to carry out the synthesis, preservation and decomposition of methane gas to test the natural gas hydrate storage and transportation of methane hydrate samples.

[0044] The three-dimensional porous graphene oxide structure contains a large number of oxygen-containing functional groups such as hydroxyl, carboxyl and epoxy groups, making graphene oxide very easy to absorb water. The dry three-dimensional porous graphene oxide is loose and porous powder, which is sponge-like and dissolves after adding water. Quickly and completely, almost immediately restore the original sol properties.

[0045] Synthesis of Aqueous Three-dimensional Porous Graphene Oxide. Mix the same amount of w...

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Abstract

The invention relates to a method for storing natural gas hydrate. The method includes the following steps of firstly, putting a porous medium and water with the same volume as pores of the porous medium in a micronano-scale limited space, and conducting sealing and standing so that water can be all absorbed by the porous medium to obtain the water-containing porous medium; secondly, putting the water-containing porous medium in a reaction container, injecting hydrate in the reaction container to generate required gas, and synthesizing the natural gas hydrate in the micronano-scale limited space; thirdly, storing the natural gas hydrate in the micronano-scale limited space so that the natural gas hydrate can be stored. Through the unique physical properties of water in the micronano-scalelimited space and the uniform formation and decomposition dynamics properties of the natural gas hydrate in the micronano-scale limited space, the brand-new high-quality energy-saving safe and efficient natural gas hydrate storing and transporting method is put forward.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate, in particular to a method for storing natural gas hydrate. Background technique [0002] Natural gas hydrate is a clathrate compound formed by natural gas and water under low temperature and high pressure. One cubic meter of natural gas hydrate can release 164 cubic meters of natural gas at normal temperature and pressure. With a huge gas storage capacity, through a certain process, natural gas is synthesized into solid hydrate, and then the hydrate is transported to the gas storage station, and finally the process of gasifying and decomposing the hydrate to form natural gas is the natural gas hydrate method Natural gas storage and transportation technology. The natural gas hydrate storage and transportation technology is divided into three steps, namely rapid synthesis of hydrates, safe storage and transportation, and efficient decomposition. [0003] Rapid preparation of high-qual...

Claims

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Application Information

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IPC IPC(8): C10L3/10
CPCC10L3/108
Inventor 万丽华梁德青
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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