Degradable gas hydrate accelerant and preparation method thereof

A gas hydrate and accelerator technology, which is applied in the field of preparation of degradable gas hydrate high-efficiency accelerators, can solve problems such as pollution and complex treatment of experimental waste liquid, achieve low dosage, wide application range, and promote efficient production Effect

Active Publication Date: 2013-04-10
HAIAN GASOLINEEUM SCI RES INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the complex problem of experimental waste liquid treatment when using traditional accelerators, or avoid the pollution of the waste liquid directly into the circulating water body to the environment and water body

Method used

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  • Degradable gas hydrate accelerant and preparation method thereof
  • Degradable gas hydrate accelerant and preparation method thereof
  • Degradable gas hydrate accelerant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare a compound accelerator solution with a mass concentration of 0.05% rhamnolipid + 0.80% sodium chloride + 1.00% sodium carbonate, take 200ml and inject it into the reactor (about 1 / 2 height of the window), set the temperature of the constant temperature water bath, and set the initial temperature 5°C, the experimental gas uses 99.9% CO 2 Gas, after the temperature stabilizes, start to inhale. After the inhalation is completed, start the tank and stir at 400-500rpm. After about 14.3min, the hydrate begins to form, and the phase equilibrium pressure is 2.05Mpa.

[0032] Specific steps are as follows:

[0033] (1) Prepare the solution: Use an electronic balance with an accuracy of 0.001g to accurately weigh the reagents and prepare a reaction solution with a corresponding concentration according to the experimental requirements, and store it for the experiment.

[0034] (2) Refrigeration: Turn on the low-temperature constant temperature circulation tank, preset the...

Embodiment 2

[0040]Prepare a composite accelerator solution with a mass concentration of 0.05% rhamnolipid + 1.20% sodium chloride + 2.00% sodium carbonate, take 200ml and inject it into the reactor (about 1 / 2 height of the viewing window), set the temperature of the constant temperature water bath, and set the initial temperature 5°C, the experimental gas uses 99.9% CO 2 Gas, after the temperature is stabilized, start to inhale, after the inhalation is completed, start stirring in the kettle at 400-500rpm, after about 9.6min, the hydrate begins to form, and the phase equilibrium pressure is 2.11Mpa.

Embodiment 3

[0042] Prepare a compound accelerator solution with a mass concentration of 0.03% rhamnolipid + 0.80% sodium chloride + 1.00% sodium carbonate, take 200ml and inject it into the reactor (about 1 / 2 height of the viewing window), set the temperature of the constant temperature water bath, and set the initial temperature 5°C, the experimental gas uses 99.9% CO 2 Gas, after the temperature stabilizes, start to inhale, after the inhalation is completed, start stirring in the kettle at 400-500rpm, after about 15min, the hydrate begins to form, and the phase equilibrium pressure is 2.02Mpa.

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Abstract

The invention provides a preparation method of a degradable gas hydrate efficient accelerant. The accelerant is prepared by three substances including rhamnolipid, sodium carbonate (NaCO3) and sodium chloride (NaCl) according to a certain ratio. The using mass concentration of the accelerant is 0.05-2%. The preparation method can be applied to generation acceleration research of the gas hydrate, greenhouse gas collection such as CO2 by a hydration method and fields such as gas hydrate separation technology. The preparation method is processed in a high-pressure reactor; the gas is provided by a high-pressure gas cylinder; the gas is introduced into the reactor by a pneumatic booster pump; the temperature and the pressure are displayed by a transmitter; and the reaction situation is recorded in real time by a data acquisition system through a camera. As a degradable biological surfactant used for the accelerant is very environment-friendly, the accelerant does not influence the environment and is low in cost, low in dosage, good in the acceleration effect, and beneficial to hydrate industrial production.

Description

technical field [0001] The invention relates to the technical field of gas hydrate industrial production and utilization, in particular to a preparation method of a degradable high-efficiency gas hydrate accelerator. Background technique [0002] Gas hydrate is a clathrate crystal compound that can efficiently store gas. Water molecules are connected by hydrogen bonds to form an ice-like cavity structure on the periphery. Gas molecules fill into the formed pores under certain pressure and temperature conditions. Gas hydrates do not have a fixed stoichiometry due to the filling gas and filling ratio. The filling rate, that is, the gas storage density of hydrates, is affected by pressure, temperature and additives. The greater the filling rate, the better the stability of the formed hydrate and the easier it is to transport. In 1990, Gudmundsson et al. proposed the concept of hydrate-based solid-state storage of natural gas. Since then, natural gas hydrate storage and transpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01J3/00C10L3/08
Inventor 王树立张琳周诗岽李恩田马维俊
Owner HAIAN GASOLINEEUM SCI RES INSTR
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