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Promoter for generation of gas hydrate, and preparation method and application thereof

A gas hydrate and accelerator technology, applied in the field of gas hydrate formation, can solve the problems of slow gas storage rate, inconvenient operation, high gas storage cost, etc., and achieve the goal of increasing the contact area, increasing the gas storage capacity, and shortening the hydration induction time Effect

Inactive Publication Date: 2012-11-21
SOUTH CHINA UNIV OF TECH
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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 disadvantages of inconvenient operation, slow gas storage rate, and high gas storage cost of the prior art, and propose a technology for rapidly synthesizing gas hydrate—surfactant dry solution gas storage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Sodium dodecyl sulfate (SDS) dry solution was prepared, in which the mass fraction of SDS was 0.03%, and the mass fraction of hydrophobic fumed nano-silica HB630 was 5%. Weigh 15.00 g of dry solution into an effective volume of 300 cm 3 In the high-pressure reactor, vacuumize the reactor and its connecting pipeline to make the vacuum degree below 0.01 MPa. Then methane gas was introduced, the temperature of the reactor was adjusted to 1 °C, and the pressure was 6 MPa to carry out constant volume reaction. After the temperature and pressure were kept constant for 15 minutes, the temperature in the kettle began to rise, the pressure decreased significantly, and methane hydrate began to form. After another 35 minutes, the temperature and pressure in the kettle tended to be stable, and the formation of methane hydrate ended. The whole process from the formation of methane hydrate to the end of the hydration reaction takes less than 1 h, which is significantly shorter than t...

Embodiment 2

[0034] Sodium dodecyl sulfate (SDS) dry solution was prepared, in which the mass fraction of SDS was 0.05%, and the mass fraction of hydrophobic fumed nano-silica HB630 was 7.5%. Weigh 15.00 g of dry solution into an effective volume of 300 cm 3 In the high-pressure reactor, vacuumize the reactor and its connecting pipeline to make the vacuum degree below 0.01 MPa. Then methane gas was introduced, the temperature of the reactor was adjusted to 1 °C, and the pressure was 6 MPa to carry out constant volume reaction. After the temperature and pressure were kept constant for 8 minutes, the temperature in the kettle began to rise, the pressure decreased significantly, and methane hydrate began to form. After another 25 minutes, the temperature and pressure in the kettle tended to be stable, and the formation of methane hydrate ended. The whole process from the formation of methane hydrate to the end of the hydration reaction takes about 0.5 h, which is significantly shorter than t...

Embodiment 3

[0036] Sodium dodecyl sulfate (SDS) dry solution was prepared, in which the mass fraction of SDS was 0.10%, and the mass fraction of hydrophobic fumed nano-silica HB630 was 10%. Weigh 15.00 g of dry solution into an effective volume of 300 cm 3 In the high-pressure reactor, vacuumize the reactor and its connecting pipeline to make the vacuum degree below 0.01 MPa. Then methane gas was introduced, the temperature of the reactor was adjusted to 1 °C, and the pressure was 6 MPa to carry out constant volume reaction. After the temperature and pressure were constant for 18 minutes, the temperature in the kettle began to rise, the pressure decreased significantly, and methane hydrate began to form. After another 33 minutes, the temperature and pressure in the kettle tended to be stable, and the formation of methane hydrate ended. The whole process from the formation of methane hydrate to the end of the hydration reaction takes less than 1 h, which is significantly shorter than the ...

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Abstract

The invention discloses a promoter for generation of gas hydrates, and a preparation method and application thereof. The promoter for generation of gas hydrates is a dry powdery solution formed after high speed shearing and dispersion of a surfactant solution and strong hydrophobic solid particles in a high intensity stirrer, wherein the surfactant solution is an aqueous solution of one or more anionic surfactants, cationic surfactants or nonionic surfactants, and the strong hydrophobic solid particles are one or more selected from the hydrophobically modified particles consisting of silica, titanium dioxide, titanium sesquioxide, alumina, zinc oxide, calcium carbonate, montmorillonite, diatomite, fly ash, zeolite, talcum and mica particles, etc. The promoter provided by the invention is highly dispersed solution microdroplets and has a great gas-liquid contact area, the dispersed microdroplets contain surfactants, which enables gas-liquid contact during growth process of hydrates to be further reinforced, and therefore, a generation rate of gas hydrates and gas storage amount in a static system are substantially improved; meanwhile, the promoter has the advantages of low cost, no pollution and convenient preparation and usage.

Description

technical field [0001] The invention relates to gas hydrate formation technology, in particular to a gas hydrate formation accelerator and its preparation and application. Background technique [0002] Gas hydrate is a non-stoichiometric enveloping cage compound formed by gas and water under low temperature and high pressure conditions. Gas molecules are wrapped in a cage lattice formed by water molecules. Hydrate technology can be applied in research fields such as energy gas (natural gas, hydrogen, etc.) storage and transportation, small oil and gas field development, carbon dioxide capture, seawater desalination, sewage treatment, and gas mixture separation. With the discovery of a large number of natural gas hydrates around the world, hydrate gas storage technology has become a major research hotspot in the field of energy and resources, and has aroused great interest of scholars. [0003] Gas hydrate has the characteristics of large gas storage capacity, clean and safe...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01J3/00C10L3/08
Inventor 樊栓狮杨亮郎雪梅王燕鸿孙丽妃陈立宇陈哲韩
Owner SOUTH CHINA UNIV OF TECH
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