Compound gas hydrate generation accelerant and preparation method thereof

A gas hydrate and hydrate generation technology, applied in the direction of using atmospheric pressure to chemically change substances, gas fuels, chemical instruments and methods, etc., can solve the problems of low gas conversion efficiency, secondary pollution, difficult recovery, etc. , to achieve the effects of improving production efficiency, easy recycling, and load reduction

Active Publication Date: 2015-03-25
北京中清绿智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of difficult recovery, secondary pollution, and low gas conversion efficiency encountered in the research of hydrate formation accelerators, and propose a method to promote the formation of hydrates from the two aspects of heat and mass transfer. Compound Hydrate Formation Accelerator for Gas Hydrate Formation

Method used

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  • Compound gas hydrate generation accelerant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Based on 1000g of the mixed solution, weigh nano-graphene, dimethylene-1,2-bis(dodecyldimethylammonium bromide)-C 12-2-12 2Br -1 and distilled water, add the weighed nanographene into distilled water, turn on the stirrer at the same time, and stir at a speed of 400ppm, and the stirring time is 8min; the weighed dimethylene-1,2-bis(dec Dialkyldimethylammonium bromide)-C 12-2-12 2Br -1 Add it into the stirred liquid, and turn on the agitator again to stir at a high speed of 900ppm, and the stirring time is controlled at 40 minutes; finally, the stirred liquid is dispersed by ultrasonic waves, and the time is controlled at 30 minutes. The configured liquid package is ready for use.

[0020] 200ml of the prepared liquid was added to a reaction kettle with a volume of 500ml, and the hydrate formation experiment was carried out at a temperature of 4°C, a pressure of 4MPa, and a rotation speed of 400rpm. The gas used in the experiment was CO 2 , the experimental results ...

Embodiment 2

[0022] Based on 1000g of the mixed solution, weigh nano-graphene, dimethylene-1,2-bis(dodecyldimethylammonium bromide)-C 12-2-12 2Br -1 and distilled water, add the weighed nanographene into distilled water, turn on the stirrer at the same time, and stir at a speed of 400ppm, and the stirring time is 8min; the weighed dimethylene-1,2-bis(dec Dialkyldimethylammonium bromide)-C 12-2-12 2Br -1 Add it into the stirred liquid, and turn on the agitator again to stir at a high speed of 900ppm, and the stirring time is controlled at 40 minutes; finally, the stirred liquid is dispersed by ultrasonic waves, and the time is controlled at 30 minutes. The configured liquid package is ready for use.

[0023] 200ml of the prepared liquid was added to a reaction kettle with a volume of 500ml, and the hydrate formation experiment was carried out at a temperature of 4°C, a pressure of 3.5MPa, and a rotation speed of 400rpm. The gas used in the experiment was CO 2 , the experimental result...

Embodiment 3

[0025] When preparing nanofluid, it is basically the same as Example 1, except that the mass fraction of nano-graphene is 0.12%, and dimethylene-1,2-bis(dodecyldimethylammonium bromide)-C 12-2-12. 2Br -1 The mass fraction is 0.08%, and water is the balance.

[0026] 200ml of the prepared liquid was added to a reaction kettle with a volume of 500ml, and the hydrate formation experiment was carried out at a temperature of 4°C, a pressure of 3MPa, and a rotation speed of 400rpm. The gas used in the experiment was CO 2 , the experimental results show that hydrate crystal nuclei appeared in the window after 92s.

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Abstract

The invention relates to a gas hydrate, in particular to a compound gas hydrate generation accelerant and a preparation method thereof. The accelerant is a mixed solution formed by dissolving nano dispersed particles and a gemini surfactant in water, wherein the nano dispersed particles are nano graphene particles, the purity degree (the mass fraction) of the nano dispersed particles is 99%, and the fineness of the nano dispersed particles ranges from 20 nm to 60 nm; the gemini surfactant adopts dimethylene-1,2-double (dodecyl dimethyl ammonium bromide)-C12-2-122Br-1; by taking the mixed solution as the total amount, in the prepared mixed solution, the concentration of the nano graphene particles is controlled from 0.08% to 1.2%, the concentration of the gemini surfactant is controlled from 0.03% to 0.1%, and the balance is water. The accelerant can be used to enhance the gas hydrate from the two processes of heat transmission and mass transfer in the generation process of the gas hydrate, reduces the induction time for gas hydrate generation, and improves generation efficiency of the gas hydrate; a nanofluid is more stable and has low possibility of coagulation under the compound condition of the nano dispersed particles and the gemini surfactant.

Description

technical field [0001] The invention relates to gas hydrates, in particular to a composite gas hydrate formation accelerator and a preparation method thereof, which reduce the induction time of hydrate formation and increase the formation rate of hydrates through the synergistic effect of physics and chemistry. Background technique [0002] Gas hydrate is a non-stoichiometric clathrate compound formed by water molecules and gas molecules under low temperature and high pressure conditions. How to generate gas hydrate efficiently and quickly includes natural gas hydrate storage and transportation technology, continuous gas separation technology, etc. The basis of a series of hydrate application technologies including gas hydrate; currently, the methods to promote hydrate formation mainly include chemical strengthening and physical strengthening. Chemical strengthening is mainly realized by adding chemical additives to the gas hydrate formation reaction solution. It mainly incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01J3/00C10L3/08
CPCB01J3/00B01J19/00C10L3/108
Inventor 周诗岽余益松张锦王树立赵书华刘朝阳蒋斌
Owner 北京中清绿智科技有限公司
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