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Preparation method of natural gas hydrate

A technology of natural gas and hydrate, which is applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve problems such as difficulty in deriving reaction heat, pipeline blockage, solid material system blockage, etc., to increase the specific surface area of ​​gas-liquid contact, increase the rate and efficiency , Efficient dispersion and mixing effect

Pending Publication Date: 2020-12-11
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] (2) Derivation of the heat of formation of natural gas hydrate
However, as the volume of the reactor increases, it becomes very difficult to export the heat of reaction, so the industrial-scale reactor must have sufficient specific surface area for heat transfer
[0015] (3) There is a problem of blockage of the water phase material system
The operating temperature for the preparation of natural gas hydrate is close to the freezing point of water, so the water phase material is easily transformed into a solid state, resulting in the blockage of pipelines, pumps, etc. and making the natural gas hydrate preparation process unable to proceed normally.
[0016] (4) There is a problem of blockage of the solid material system
Since the natural gas hydrate produced is solid, there must be problems such as pipeline blockage and circulation pump difficulty in normal operation when adopting the solid material system circulation reaction process.
[0017] (5) There is a contradiction between increasing the gas-liquid ratio and increasing the conversion rate per pass

Method used

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  • Preparation method of natural gas hydrate

Examples

Experimental program
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Effect test

Embodiment 1

[0065] A method for preparing natural gas hydrate, especially using the liquid phase material formed by mixing alkyl glucoside, lower alcohol and water as a hydration agent, adopting high-efficiency gas-liquid dispersion mixing technology, preparing hydration agent, compressing natural gas, and gas-liquid A method for preparing natural gas hydrate by dispersion mixing and cooling of gas-liquid mixture. The specific method steps are as follows:

[0066] (1) Hydration agent preparation: the degree of polymerization of glucose is 1.6 octyl glucoside, methanol and water are mixed, wherein the mass percent concentration of octyl glucoside is 0.1%, and the mass percent concentration of methanol is 1.0%, the obtained The liquid phase material enters the next step as a hydration agent;

[0067] (2) Hydration agent cooling: In the jacketed heat exchanger, the hydration agent prepared in the previous step is cooled to 10°C, and the cooled liquid phase material enters the fifth step of ...

Embodiment 2

[0073] A method for preparing natural gas hydrate, especially using the liquid phase material formed by mixing alkyl glucoside, lower alcohol and water as a hydration agent, adopting high-efficiency gas-liquid dispersion mixing technology, preparing hydration agent, compressing natural gas, and gas-liquid A method for preparing natural gas hydrate by dispersion mixing and cooling of gas-liquid mixture. The specific method steps are as follows:

[0074] (1) Hydration agent preparation: the degree of polymerization of glucose is 2.0 octadecyl glucoside, ethanol and water are mixed, wherein the mass percentage concentration of octadecyl glucoside is 1.0%, and the mass percentage concentration of ethanol is 10.0%, obtained The liquid phase material enters the next step as a hydration agent;

[0075] (2) Hydration agent cooling: In the shell-and-tube heat exchanger, the hydration agent prepared in the previous step is cooled to -10°C, and the cooled liquid phase material enters th...

Embodiment 3

[0081] A method for preparing natural gas hydrate, especially using the liquid phase material formed by mixing alkyl glucoside, lower alcohol and water as a hydration agent, adopting high-efficiency gas-liquid dispersion mixing technology, preparing hydration agent, compressing natural gas, and gas-liquid A method for preparing natural gas hydrate by dispersion mixing and cooling of gas-liquid mixture. The specific method steps are as follows:

[0082] (1) Hydration agent preparation: the degree of polymerization of glucose is 1.8 decyl glucoside, ethylene glycol and water are mixed, wherein the mass percent concentration of decyl glucoside is 0.4%, and the mass percent concentration of ethylene glycol is 2.0%, The obtained liquid phase material enters the next step as a hydration agent;

[0083] (2) Hydration agent cooling: In the shell-and-tube heat exchanger, the hydration agent prepared in the previous step is cooled to -4°C, and the cooled liquid phase material enters th...

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Abstract

The invention relates to a preparation method of a natural gas hydrate, in particular to a method for preparing the natural gas hydrate by taking a liquid-phase material formed by mixing alkyl glycoside, lower alcohol and water as a hydration agent and adopting a high-efficiency gas-liquid dispersion mixing technology. According to the method, the characteristics of a reactant system, a reaction process and a product are fully utilized, the technological process is simple and easy to implement, the reaction rate is high, the one-way conversion rate is high, the operation cost is low, large-scale continuous operation is easy to achieve, and the method is a clean and efficient production method meeting the development requirements of green chemical engineering. The method not only can provide technical support for storage and transportation of natural gas, but also can provide technical support for formation, exploitation, storage, transportation and the like of natural gas hydrate minerals, and has remarkable economic and social benefits.

Description

technical field [0001] A method for preparing natural gas hydrate, especially using the liquid phase material formed by mixing alkyl glucoside, lower alcohol and water as a hydration agent, adopting high-efficiency gas-liquid dispersion mixing technology, preparing hydration agent, compressing natural gas, and gas-liquid The invention discloses a method for preparing natural gas hydrate through dispersion mixing and cooling of gas-liquid mixture, which belongs to the field of natural gas storage and transportation and the technical field of natural gas hydrate preparation. Background technique [0002] 1. Natural gas and its storage and transportation [0003] (1) Natural gas [0004] Natural gas is a fossil fuel, usually referring to oil field gas and gas field gas. The main components of natural gas are alkanes, of which methane accounts for the vast majority, and there are small amounts of ethane, propane, butane, etc. Methane is the simplest hydrocarbon, it is a color...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
CPCC10L3/108C10L2290/24C10L2290/30
Inventor 许文林张小兴王雅琼
Owner YANGZHOU UNIV