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Composition capable of improving stability of hydrate and storage and transportation method based on solid hydrate

A composition and hydrate technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of limited decomposition inhibition effect and inability to meet the long-term atmospheric pressure storage and transportation requirements, so as to increase the formation rate and improve mechanical stability sex, the effect of inhibiting decomposition

Active Publication Date: 2021-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the technical problems in the prior art that the inhibition effect on solid hydrate decomposition is limited and cannot meet the requirements of long-term atmospheric pressure storage and transportation, and Provide a composition capable of improving the stability of hydrates and a storage and transportation method based on solid hydrates, the composition capable of improving the stability of hydrates can improve the stability of hydrates under low temperature self-protection conditions and reduce the waste of gas and the pressure requirements for storage and transportation equipment, and can also improve the gas recovery rate of hydrates

Method used

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  • Composition capable of improving stability of hydrate and storage and transportation method based on solid hydrate
  • Composition capable of improving stability of hydrate and storage and transportation method based on solid hydrate
  • Composition capable of improving stability of hydrate and storage and transportation method based on solid hydrate

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Experimental program
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Effect test

Embodiment 1

[0097] The formulation of the composite phase change material is: the PEG400 (6.0 ° C melting point), the nanometer graphite and bentonite are compared to the mass ratio of 1: 5: 0.05.

[0098] The preparation method of composite phase change materials is as follows:

[0099] (1) The PEG400 is accurately weighed, and it is configured with ethanol (75% by volume) to a PEG400 alcohol solution having a mass concentration of 5%;

[0100] (2) Dry nanometer graphite under 120 ° C, remove impurities inside the material to prepare nano graphite;

[0101] (3) Accurate weighing pretreatment nano graphite, bentonite is added to the alcohol solution obtained in step (1) in a stirred state, and after impregnating 8 h, drying 8 h is dried under 8 h to obtain a composite phase change material.

[0102] The formulation of the hydrate accelerator is that the hydrate promoter is configured by tetrabutylammonium bromide and leucine according to the mass ratio 2: 1.

[0103] A composition capable of ...

Embodiment 2

[0119] Method based on solid hydrate storage:

[0120] (1) Hydrate production process:

[0121] The total amount of the hydrate accelerator, the composite phase change material, and the rats, and the rats of the rats are 1.5% of the water content (i.e., the mass ratio of the aqueous phase and the support material is 2.6: 1), and the present embodiment is obtained. A composition capable of improving hydrate stability is added to a high pressure reactor containing water, and evacuates the remaining impurity gas in the kettle; set the hydrate to prepare the temperature of 278.65K to reach the reaction temperature and remain stable for 2h. The pre-treated gas passes into the high pressure reactor to the experimental pressure 8.0 MPa, and the reaction process is enhanced by magnetic stirring, and the stirring rate is set to 60R / min;

[0122] When the hydrate production in the high pressure reactor is monitored. When the white hydrate particles are present in the system, the time to b...

Embodiment 3

[0132] Method based on solid hydrate storage:

[0133] (1) Hydrate production process:

[0134] The total amount of the hydrate accelerator, the composite phase change material, and the rats, and the rats of the rats are 1.5% of the water content (i.e., the mass ratio of the aqueous phase and the support material is 2.6: 1), and the present embodiment is obtained. A composition capable of improving hydrate stability is added to a high pressure reactor containing water, and evacuates the remaining impurity gas in the kettle; set the hydrate to prepare the temperature of 278.65K to reach the reaction temperature and remain stable for 2h. The pre-treated gas passes into the high pressure reactor to the experimental pressure 8.0 MPa, and the reaction process is enhanced by magnetic stirring, and the stirring rate is set to 60R / min;

[0135] When the hydrate production in the high pressure reactor is monitored. When the white hydrate particles are present in the system, the time to b...

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Abstract

The invention relates to the technical field of safe storage and transportation of gas, and discloses a composition capable of improving the stability of a hydrate and a storage and transportation method based on a solid hydrate. The composition contains a hydrate accelerant and a supporting material; wherein foam holes are distributed in the supporting material, the compressive strength of the supporting material is 1-8 MPa, the average diameter of the foam holes is 100-150 microns, the specific surface area is 500-1000 m < 2 > / g, and the density is 0.05-0.4 g / cm < 3 >. The composition capable of improving the stability of the hydrate can improve the stability of the hydrate under a low-temperature self-protection condition, reduces gas waste and pressure-bearing requirements on storage and transportation equipment, and also can improve the gas recovery rate of the hydrate.

Description

Technical field [0001] In the field of gas safety storage and transportation techniques of the present invention, in particular, a composition capable of improving the stability of hydrate and a method based on solid hydrate storage. Background technique [0002] Solid-state hydrate storage and transportation natural gas technology has many advantages, such as relatively high gas storage, storage processes such as relatively safe and reliable non-explosive characteristics, etc., as emerging alternative gas storage technologies, are widely studied in the industry. At this stage, the focus of research is mainly in terms of increasing the production rate and gas storage capacity of hydrate, and the hydrate is small, and the rate and gas storage amount of the hydrate is also improved and can also reduce hydration. The decomposition of the substance is relatively small. [0003] In fact, when the hydrate flows into the reservoir in the reactor, the hydrate is often required to transfe...

Claims

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Application Information

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IPC IPC(8): C10L3/10
CPCC10L3/108Y02E60/32
Inventor 闫柯乐肖安山王倩胡绪尧吕程张红星
Owner CHINA PETROLEUM & CHEM CORP
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