A kind of gas hydrate promoter and preparation method thereof

A hydrate accelerator and accelerator technology, which are applied in the methods of chemically changing substances by atmospheric pressure, gas fuels, chemical instruments and methods, etc., can solve the problem of low gas content, slow formation rate, long induction time, etc. problems, to achieve the effects of improving economic efficiency, increasing gas storage, and shortening time

A hydrate accelerator and accelerator technology, which are applied in the methods of chemically changing substances by atmospheric pressure, gas fuels, chemical instruments and methods, etc., can solve the problem of low gas content, slow formation rate, long induction time, etc. problems, to achieve the effects of improving economic efficiency, increasing gas storage, and shortening time

CN104667844BActive Publication Date: 2016-04-13江苏溢坤医疗科技有限公司
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  • A kind of gas hydrate promoter and preparation method thereof
  • A kind of gas hydrate promoter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The selected composite accelerator consists of: coconut oil fatty acid diethanolamide with a mass percentage of 1-2.5%; polyoxyethylene ether sulfate with a mass percentage of 9-15%; and a mass percentage of 0.2- 0.5% polyquaternium. The experimental steps are the same as above. The equilibrium condition of hydrate formation is that the temperature is 1.9~5.5℃ and the pressure is 0.79~2.7Mpa.

[0038] Example 1:

[0039] The selected accelerator GFH1 is composed of the following components: 1% by mass of coconut oil fatty acid diethanolamide, 9% by mass of polyoxyethylene ether sulfate, 0.2% by mass of polyoxyethylene ether sulfate quaternary ammonium salt. Add deionized water and stir at 72°C for 120 min to prepare a hydrate accelerator. The experiment was done with methane gas at a temperature of 5.6°C, and the experimental procedure was the same as above. The experimental results are shown in Table 2.

[0040] Experiment number Mass concentration ...

Embodiment 2

[0042] The selected accelerator GFH4 is composed of the following components: coconut oil fatty acid diethanolamide with a mass percentage of 2.5%, polyoxyethylene ether sulfate with a mass percentage of 15%, polyoxyethylene ether sulfate with a mass percentage of 0.5%. quaternary ammonium salt. Add deionized water and stir at 83°C for 120 min to prepare a hydrate accelerator. Experiment with methane gas at a temperature of 5.7°C, and the experimental procedure is the same as above. The experimental results are shown in Table 3.

[0043] Experiment number Mass concentration (wt%) Induction time (min) Phase equilibrium pressure (MPa) 1 0.1 8.9 2.98 2 0.2 7.8 2.87 3 0.3 6.1 2.45 4 0.4 4.6 2.16 5 0.5 3.3 2.12 6 0.6 3.1 2.12

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Abstract

The invention belongs to the technical field of gas hydrate production and utilization, and in particular relates to a gas hydrate accelerator and a preparation method thereof. The gas hydrate accelerator is made by mixing coconut oil fatty acid diethanolamide, polyoxyethylene ether sulfate, and polyquaternium salt as additives with deionized water at 72-83°C for 120 minutes; the coconut oil fatty acid Diethanolamide accounts for 1-2.5% by mass of the solvent; polyoxyethylene ether sulfate accounts for 9-16% by mass of the solvent; polyquaternium salt accounts for 0.2-0.5% by mass of the solvent %, and the rest is deionized water. The gas hydrate promoter of the invention has the advantages of good hydrate formation promoting effect, wide application, low cost and good economic benefits.

Description

technical field [0001] The invention relates to the technical field of gas hydrate production and utilization, in particular to a preparation method of a composite accelerator for accelerating the formation of gas hydrate. Background technique [0002] Natural gas hydrate is a non-stoichiometric cage-type crystalline compound formed by the interaction of natural gas and water under the thermal conditions of low temperature and high pressure. Its main water molecules are connected by hydrogen bonds to form a series of polyhedral cavities. When these cavities are filled by gas molecules, they have thermodynamic stability. The corresponding gas and latent heat energy are stored in the hydrate crystals. It is precisely because of these properties of hydrates that people propose to apply hydrate methods to various aspects such as gas storage and transportation, sewage treatment, seawater desalination, gas separation, solution concentration, and heat storage. [0003] However, t...

Claims

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Application Information

Patent Timeline
13 Apr 2016
Publication
CN104667844B
IPC
B01J19/00; B01J3/00; C10L3/08
Inventors
王树立; 常凯