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Boric acid solution gas hydrate accelerant and application thereof in preparation of high-gas-storage-density gas hydrate

A gas hydrate, boric acid solution technology, applied in gas fuel, fuel additive, petroleum industry and other directions, can solve the problems of practical application impact, foam, high cost, improve kinetics and gas storage, simple preparation method and low price Effect

Active Publication Date: 2020-11-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Accelerating the formation of hydrates can be achieved through traditional mechanical and physical methods, such as: stirring, water spraying and bubbling, etc., but the energy consumption is high and the cost is high, which is not conducive to the industrial production of hydrates
In order to achieve a more cost-effective goal, kinetic or thermodynamic accelerators have attracted the attention of scientific researchers, among which sodium dodecyl sulfate (SDS) has received extensive attention, but this type of traditional surfactant The agents are all from non-renewable petrochemical raw materials, the cost is high, and serious environmental problems will be caused during the degradation process, which is far from meeting the requirements of my country's economic and environmental development; Practical application makes an impact

Method used

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  • Boric acid solution gas hydrate accelerant and application thereof in preparation of high-gas-storage-density gas hydrate
  • Boric acid solution gas hydrate accelerant and application thereof in preparation of high-gas-storage-density gas hydrate
  • Boric acid solution gas hydrate accelerant and application thereof in preparation of high-gas-storage-density gas hydrate

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Experimental program
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Effect test

Embodiment 1

[0029] The 0.1wt% boric acid solution was obtained by the following preparation method: 0.1g boric acid was added to 99.9g deionized water to prepare a 0.1wt% boric acid solution, mixed evenly and placed overnight for later use.

[0030] The application of the boric acid solution in the preparation of high gas storage density gas hydrate specifically includes the following steps: adding the above-mentioned 0.1wt% boric acid solution into the autoclave, removing air, and feeding the autoclave (with an effective volume of 500mL) was filled with methane gas at a pressure of 9.5MPa, under the synergistic effect of the components in the extract, the solid hydrate with high gas storage density was rapidly grown to form a solid hydrate, and the gas storage capacity at a certain time interval was recorded. The results are shown in Table 1.

Embodiment 2

[0032] The 0.2wt% boric acid solution was obtained by the following preparation method: 0.2g boric acid was added to 99.8g deionized water to prepare a 0.2wt% boric acid solution, mixed evenly and placed overnight for later use.

[0033] The application of the boric acid solution in the preparation of high gas storage density gas hydrate specifically includes the following steps: adding the above-mentioned 0.2wt% boric acid solution into the autoclave, removing air, and feeding the autoclave (with an effective volume of 500mL) was filled with methane gas at a pressure of 9.5MPa, under the synergistic effect of the components in the extract, the solid hydrate with high gas storage density was rapidly grown to form a solid hydrate, and the gas storage capacity at a certain time interval was recorded. The results are shown in Table 1.

Embodiment 3

[0035] The 0.5wt% boric acid solution was obtained by the following preparation method: 0.5g boric acid was added to 99.5g deionized water to prepare a 0.5wt% boric acid solution, mixed evenly and placed overnight for later use.

[0036] The application of the boric acid solution in the preparation of high gas storage density gas hydrate specifically includes the following steps: adding the above-mentioned 0.5wt% boric acid solution into the autoclave, removing air, and feeding the autoclave (with an effective volume of 500mL) was filled with methane gas at a pressure of 9.5MPa, under the synergistic effect of the components in the extract, the solid hydrate with high gas storage density was rapidly grown to form a solid hydrate, and the gas storage capacity at a certain time interval was recorded. The results are shown in Table 1.

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Abstract

The invention belongs to the technical field of gas hydrates, and discloses a boric acid solution gas hydrate accelerant and application thereof in preparation of high-gas-storage-density gas hydrates. The gas hydrate accelerant comprises a boric acid solution, wherein the concentration of the boric acid solution in the gas hydrate accelerant is 0.05-5wt%. The gas hydrate accelerant further comprises leucine. The application of the gas hydrate accelerant in preparation of the high-gas-storage-density gas hydrate specifically comprises the following steps: introducing high-pressure gas into a high-pressure reaction kettle filled with the gas hydrate accelerant at a low temperature, and reacting to obtain the high-gas-storage-density solid gas hydrate. The gas hydrate accelerant disclosed bythe invention can efficiently promote the generation of gas hydrate, greatly improves hydrate formation dynamics and gas storage capacity, is low in cost and has a relatively good application prospect.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to a boric acid solution gas hydrate accelerator and its application in the preparation of high gas storage density gas hydrate. Background technique [0002] Gas hydrate, also known as a cage compound, is a non-stoichiometric cage crystal compound formed by a small guest molecule (hydrogen, methane, carbon dioxide, ethane, propane, etc.) and water molecules at a certain temperature and pressure through hydrogen bonds. . Theoretically, methane can form with the molecular formula CH 4 5.75H 2 Type I hydrate of O, that is to say, the gas storage capacity of the hydrate of the cubic structure is as high as 155mg·g -1 , that is, 1g of water can store 155mg of methane, which has extremely important application value for the storage and transportation of methane. However, in the static pure water system, due to the influence of interfacial interactions, hydrates a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/00C10L3/10C10L10/00
CPCC10L3/003C10L3/108C10L10/00C10L2290/141
Inventor 王卫星牛晓春曾艳娴
Owner SOUTH CHINA UNIV OF TECH
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