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Hydrate accelerant and application thereof in preparing high-gas-storage-density gas hydrate

A gas hydrate and accelerator technology, applied in gas fuel, other chemical processes, petroleum industry, etc., can solve the problems of negative impact on the environment, increase the formation rate of gas hydrate, and high cost, and achieve a fast method and shorten the hydration induction. time, and the effect of increasing gas storage density

Active Publication Date: 2015-10-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] SDS has been proven to significantly increase the rate of gas hydrate formation, but SDS and most other surfactants are derived from non-renewable petrochemical raw materials, which are not only costly, but also have a negative impact on the environment

Method used

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  • Hydrate accelerant and application thereof in preparing high-gas-storage-density gas hydrate

Examples

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Effect test

Embodiment 1

[0019] A hydrate accelerator is an amino acid aqueous solution with a mass fraction of 0.5%, which is uniformly mixed with 99.5 grams of water, 0.3 grams of leucine and 0.2 grams of phenylalanine.

[0020] A method for rapidly preparing gas hydrates with high gas storage density: fill 100 grams of the above-mentioned amino acid aqueous solution into 100 grams of the above-mentioned amino acid aqueous solution at 0 ° C in an autoclave (the effective volume of the autoclave is 500 mL), and charge methane gas with a pressure of 9.5 MPa, Under the action of amino acid promoters, solid hydrates with high gas storage density were rapidly grown to form, and the gas storage volume was recorded at a certain time interval. The results are shown in Table 1, where the hydration induction time is 4 minutes.

Embodiment 2

[0022] A hydrate accelerator is an amino acid aqueous solution with a mass fraction of 1%, which is uniformly mixed with 99 grams of water, 0.5 grams of leucine and 0.5 grams of valine.

[0023] A method for rapidly preparing gas hydrates with high gas storage density: fill 100 grams of the above-mentioned amino acid aqueous solution into 100 grams of the above-mentioned amino acid aqueous solution at 0 ° C, and charge methane gas with a pressure of 8.5 MPa in the The solid hydrate with high gas storage density was rapidly grown under the action, and the gas storage volume was recorded at a certain time interval. The results are shown in Table 1, where the hydration induction time is 5 minutes.

Embodiment 3

[0025] A hydrate accelerator is an amino acid aqueous solution with a mass fraction of 0.2%, which is uniformly mixed with 99.8 grams of water, 0.1 grams of phenylalanine and 0.1 grams of isoleucine.

[0026] A method for rapidly preparing gas hydrates with high gas storage density: 100 grams of the above-mentioned amino acid aqueous solution in a high-pressure reactor ((effective volume 500mL)) at 0°C is filled with methane gas with a pressure of 9.5 MPa, and the amino acid accelerator The solid hydrates with high gas storage density were rapidly grown under the action of , and the gas storage volume was recorded at a certain time interval. The results are shown in Table 1, where the hydration induction time is 8 minutes.

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Abstract

The invention relates to the technical field of energy materials, and discloses a hydrate accelerator and an application thereof in preparing a high-gas-storage-density gas hydrate. The accelerant comprises amino acid and water, and is prepared by well mixing 100 parts by mass of water and 0.05-5 parts by mass of amino acid. The application comprises the specific steps that 100 parts by mass of water and 0.05-5 parts by mass of amino acid are well mixed, such that an accelerant water solution is obtained; the accelerant water solution is placed in an autoclave; high-pressure gas is delivered in under a low temperature; and a reaction is allowed for a period of time, such that the high-gas-storage-density solid gas hydrate is obtained. The accelerant provided by the invention is green and environment-friendly. With the accelerant, hydration induction time can be reduced, gas storage capacity can be increased, and gas storage density can be improved. The accelerant provided by the invention also has the advantages of low price, low dosage, and wide source. The accelerant is recyclable, and has no special requirement on temperature and pressure conditions. The method for preparing the high-gas-storage-density gas hydrate is fast, highly efficient, simple, and easy to realize.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to a hydrate accelerator and its application in rapid preparation of gas hydrate with high gas storage density. Background technique [0002] Gas hydrates, also known as gas clathrates, are non-stoichiometric crystalline clathrates. In hydrates, the host water molecules are spatially linked by hydrogen bonds, forming a series of polyhedral cavities, and gas fills these cavities. When the lattice is disrupted, for example by increasing the storage temperature of gas hydrates, the gas is released. Due to the unique physical and chemical characteristics of gas hydrate, gas hydrate technology is widely used in separation, capture, storage or transportation of gas. [0003] The U.S. Department of Energy proposed that the gas storage density of methane hydrate should reach 180v / v under standard temperature and pressure. Involving gas-solid or gas-liquid interfacial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C10L3/10
Inventor 王卫星蔡元浩陈碧玉陈玉龙张世豪
Owner SOUTH CHINA UNIV OF TECH
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