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Hydrate accelerant composition containing nanoparticles, application of hydrate accelerant composition and preparation method of hydrate

A hydrate accelerator and nanoparticle technology, applied in chemical instruments and methods, other chemical processes, petroleum industry, etc., can solve the problems of shortening the induction time of hydrate formation, low gas storage density, increasing gas solubility, etc., to achieve improved Effects of hydrate growth rate, increasing gas storage density, and shortening induction time

Active Publication Date: 2021-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a hydrate accelerator composition containing nanoparticles in order to overcome the problems of the existing hydrate formation accelerators, such as limited nucleation promotion and growth rate, and low gas storage density. The hydrate accelerator composition has the advantages of shortening the hydrate formation induction time, increasing gas solubility, and improving the hydrate formation ability

Method used

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  • Hydrate accelerant composition containing nanoparticles, application of hydrate accelerant composition and preparation method of hydrate

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preparation example Construction

[0053] The third aspect of the present invention provides a method for preparing a hydrate, the method comprising the following steps:

[0054] (1) Mix the above-mentioned hydrate accelerator composition containing nanoparticles with a solvent to obtain a hydrate accelerator composition dispersion liquid, the solvent can dissolve the dispersant and the surfactant, but cannot dissolve the nanoparticles;

[0055] (2) The gas is brought into contact with the hydrate promoter composition dispersion in the presence of water under hydrate forming conditions.

[0056] According to the present invention, the mixing described in step (1) is preferably implemented in the following manner:

[0057] (a) in the presence of a solvent, the nanoparticles are first contacted with a stabilizer to obtain a first contacted mixture;

[0058] (b) subjecting the first contacted mixture to a second contact with a surfactant.

[0059] Wherein, relative to 100 parts by weight of the solvent, the amo...

specific Embodiment approach

[0071] According to a specific embodiment of the present invention, the preparation of the hydrate, that is, the specific steps of the performance evaluation experiment of the hydrate accelerator composition containing nanoparticles are as follows:

[0072] (1) Prepare a hydrate accelerator composition dispersion containing nanoparticles and mix it with water, place it in a reaction kettle, vacuumize the system, and pass through the experimental gas to replace it more than 3 times;

[0073] (2) Set the system temperature to the experimental temperature. When the temperature in the reactor reaches the preset value and remains stable for 5 hours, a certain amount of experimental gas is introduced to make the system reach a dissolution equilibrium (the pressure of the injected gas is less than the corresponding temperature at this temperature. hydrate equilibrium pressure);

[0074] (3) Continue to feed the experimental gas, stop the gas supply after reaching the experimental pre...

Embodiment 1

[0080] S1: 10 parts by weight of nano-SiO with a particle diameter of 10-50 nm 2Particles and 0.6 parts by weight of sodium naphthalenesulfonate are put into 100 parts by weight of water and stirred, the stirring speed is 700r / min, and the stirring time is 30min;

[0081] S2: Add 2.5 parts by weight of surfactant (sodium lauroyl glutamate and 1-ethyl-3-methylimidazole acetate with a mass ratio of 1:3) into the mixture obtained in S1 and stir at a stirring speed of 500r / min, and the stirring time is 20min to obtain a hydrate accelerator composition dispersion.

[0082] The preparation of hydrate is carried out in a high-pressure fully transparent sapphire reactor with a maximum volume of 50cm 3 , mix the above-mentioned hydration accelerator composition dispersion with water and put it into a reaction kettle, wherein the mass of the above-mentioned hydration accelerator composition dispersion is 1.0% of water, and the total volume of the dispersion and water is 10mL. The expe...

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Abstract

The invention relates to the technical field of safe storage and transportation of natural gas, in particular to a hydrate accelerant composition, and particularly relates to a hydrate accelerant composition containing nanoparticles, application of the hydrate accelerant composition and a method for preparing a hydrate by using the hydrate accelerant composition. The hydrate accelerant composition containing the nanofluid contains nanoparticles, a surfactant and a stabilizer, and the surfactant at least comprises an amino acid ampholytic surfactant and an imidazoline surfactant. The hydrate accelerant composition containing the nanoparticles has the advantages that the hydrate generation induction time is shortened, the gas solubility is increased, and the hydrate generation capacity is improved.

Description

technical field [0001] The invention relates to the technical field of safe storage and transportation of natural gas, in particular to a hydrate accelerator, in particular to a hydrate accelerator composition containing nanoparticles and its application and a method for preparing hydrate using the hydrate accelerator composition . Background technique [0002] Natural gas hydrate is a non-stoichiometric crystal cage formed by small gas molecules and water molecules under low temperature and high pressure conditions, theoretically 1m 3 Hydrate can store 150~180m 3 of methane gas. Compared with conventional gas storage methods, such as CNG (compressed natural gas) and LNG (liquefied natural gas), natural gas hydrate preparation conditions are mild, the gas storage capacity is large, and the gas quality is low. 2 S, CO 2 The existence of impurity gases such as hydrates does not affect the formation and decomposition of hydrates, so the solid hydrate storage and transportat...

Claims

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Application Information

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IPC IPC(8): C09K3/00C10L3/10
CPCC09K3/00C10L3/108
Inventor 闫柯乐肖安山王倩吕程胡绪尧任悦萌张红星
Owner CHINA PETROLEUM & CHEM CORP
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