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Composite phase change material, solid hydrate promoting agent, preparation method of solid hydrate promoting agent and method for improving gas storage and transportation capacity of solid hydrate method

A technology of composite phase change material and hydrate accelerator, which is applied to composite phase change material to improve the gas storage and transportation capacity of solid hydrate method, the field of solid hydrate promoting agent and preparation, and can solve the problem of low gas storage capacity and hydrate generation rate. slow and so on

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 present invention aims at the existing accelerators containing phase change materials that need to be pretreated to obtain oil-water emulsions and cannot be directly used for hydrate formation, and there is a hydrate formation rate slow, low gas storage capacity, etc., and provide a composite phase change material, a solid hydrate promoting agent and a preparation method, and a method for improving the gas storage and transportation capacity of the solid hydrate method. It can be directly added to the hydrate generation system after being pre-treated into an oil-water emulsion. Not only that, the composite phase change material can not only increase the formation rate of solid hydrate in the application of hydrate generation, but also increase the gas storage capacity

Method used

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  • Composite phase change material, solid hydrate promoting agent, preparation method of solid hydrate promoting agent and method for improving gas storage and transportation capacity of solid hydrate method
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  • Composite phase change material, solid hydrate promoting agent, preparation method of solid hydrate promoting agent and method for improving gas storage and transportation capacity of solid hydrate method

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preparation example Construction

[0037] In a specific embodiment of the present invention, the preparation method of the solid hydration promoting agent comprises:

[0038] (1) Weighing the phase-change material, mixing the phase-change material with a solvent above the melting point of the phase-change material to form a solution with a mass concentration ranging from 1% to 50%;

[0039] (2) Drying the porous carrier at 120°C for pretreatment to remove impurities inside the porous carrier;

[0040] (3) Weighing the porous carrier and the solid dispersant, adding them into the solution obtained in step (1) in a mixed state, soaking for 2h to 10h, and then drying at 60°C-120°C for 6h to 12h to obtain a composite phase change material;

[0041] (4) Composite the composite phase change material with the hydrate accelerator and preferably added auxiliary agent.

[0042] In step (1), take polyethylene glycol (weight-average molecular weight 400) as an example, the melting point of polyethylene glycol is 6.0°C, an...

Embodiment 1

[0075] The formula of composite phase change material is:

[0076] PEG400 (melting point is 6.0°C), nano-graphite and bentonite are mixed in a mass ratio of 1:5:0.05.

[0077] According to the above formula, the preparation method of the composite phase change material is as follows:

[0078] (1) Accurately weigh PEG400, mix it with ethanol (75% by volume) and configure it into a PEG400 alcohol solution with a mass concentration of 5%;

[0079] (2) drying the nano-graphite at 120° C. to remove impurities inside the material to obtain pretreated nano-graphite;

[0080] (3) Add accurately weighed pretreated nano-graphite and bentonite to the alcohol solution obtained in step (1) under stirring, soak for 8 hours, and dry at 80° C. for 8 hours to obtain a composite phase change material.

[0081] The formula of the hydration promoter is:

[0082] The hydration accelerator is prepared from tetrabutylammonium bromide and leucine in a mass ratio of 2:1.

[0083] The solid hydrati...

Embodiment 2

[0091] The formula of composite phase change material is:

[0092] PEG400 (melting point is 6.0°C), nano-graphite and bentonite are mixed in a mass ratio of 1:5:0.05.

[0093] According to the above formula, the preparation method of the composite phase change material is as follows:

[0094] (1) Accurately weigh PEG400, mix it with ethanol (75% by volume) and configure it into a PEG400 alcohol solution with a mass concentration of 5%;

[0095] (2) drying the nano-graphite at 120° C. to remove impurities inside the material to obtain pretreated nano-graphite;

[0096] (3) Add the pretreated nano-graphite and bentonite to the alcohol solution obtained in step (1) under stirring, soak for 8 hours, and dry at 80° C. for 8 hours to obtain a composite phase change material.

[0097] The formula of the hydration promoter is:

[0098] The hydration accelerator is prepared from tetrabutylammonium bromide and leucine in a mass ratio of 2:1.

[0099] The solid hydration enhancers ar...

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Abstract

The invention relates to the technical field of safe storage and transportation of gas, and discloses a composite phase change material, a solid hydrate promoting agent, a preparation method of the solid hydrate promoting agent and a method for improving the gas storage and transportation capacity of a solid hydrate method. The composite phase change material comprises a phase change material, a porous matrix, and a solid dispersant; the phase change material and the solid dispersant are loaded on the porous matrix. The composite phase change material does not need to be pretreated into an oil-water emulsion before preparation of the hydrate, and can be directly added into a generation system of the hydrate, and in addition, the composite phase change material can improve the generation rate of the solid hydrate and the gas storage capacity in the generation application of the hydrate.

Description

technical field [0001] The invention relates to the technical field of gas safe storage and transportation, in particular to a composite phase change material, a solid hydrate promoting agent and a preparation method thereof, and a method for improving the gas storage and transportation capacity of the solid hydrate method. Background technique [0002] Methane accounts for the majority (>90vol%) in natural gas, and it also contains a small amount of ethane, propane and other components. Compared with conventional natural gas storage and transportation technologies, such as liquefied natural gas (LNG), compressed natural gas (CNG), and adsorption storage and transportation technology (ANG), the new solid hydrate method (NGH) natural gas storage and transportation technology has more advantages , such as: low requirements on the formation temperature and pressure of hydrate; relatively high gas storage capacity; safe storage process, etc. Theoretically 1m 3 Water energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C10L3/10
CPCC09K5/06C10L3/108
Inventor 闫柯乐吕程任悦萌胡绪尧张红星肖安山林雨王倩
Owner CHINA PETROLEUM & CHEM CORP
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