Gas hydrate accelerant and preparation method thereof

A technology of gas hydrates and accelerators, which is applied in the direction of gas fuels, chemical instruments and methods, and other chemical processes, can solve the problems that hinder the greening of hydrate technology, the limited promotion effect of hydrates, and the low reuse rate, and achieve Shorten the generation time, promote the effect, and have obvious effects

Active Publication Date: 2017-03-29
创科云涂节能新材料科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, these existing accelerators still have a limited promotion effect on hydrates, and there are disadvantages such as large dosage, low recycling rate, and poor economy, which are still not enough for industrial application processes.
The main problem is the difficulty of degradation, which seriously hinders the realization of green hydrate technology

Method used

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  • Gas hydrate accelerant and preparation method thereof
  • Gas hydrate accelerant and preparation method thereof
  • Gas hydrate accelerant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] 1) According to the preparation steps of the above-mentioned hydrate accelerator, hydrate accelerators with different concentrations were prepared according to the accelerator components shown in Table 1.

[0031] 2) Vacuumize the reactor 10 and the piping system with a vacuum pump for 40-50 minutes.

[0032] 3) In order to get rid of the air in the reactor 10 and the pipeline system as much as possible, they were replaced twice with the test gas, and then vacuumized again.

[0033] 4) The prepared hydrate accelerator is injected into the reactor 10 as an aqueous solution with a concentration of 400-800 ppm, and stirred for 3-5 minutes.

[0034] 5) Open the one-way valve (4), fill the reactor with high-pressure experimental gas, and maintain the pressure of the reaction system at the required pressure of 0-30 MPa through the pressure regulating valve (2).

[0035] 6) Set the experimental temperature and start the temperature control system of the experimental device. ...

Embodiment 1

[0043]The composition of the high-efficiency degradable hydrate accelerator selected is as follows: the mass concentration of glucoamylase is 1.8%, the mass concentration of tea saponin is 0.8%, and the mass concentration of mulberry leaf powder slurry is 0.1%. Add deionized water and stir at 50°C for 60 minutes to make a hydrate accelerator. The accelerator is diluted to 400-800ppm aqueous solution and injected into the reactor, and the experiment is carried out with methane gas at a temperature of 7°C, and the experiment procedure is the same as above. The experimental results are shown in Table 2. Under the conditions of the above-mentioned Example 1, it is obtained through experiments that the induction time of hydrate formation is 4.6-8.0 min, and the higher the mass concentration of the accelerator, the shorter the induction time.

[0044] Table 2 Hydrate promoter concentration and experimental results

[0045]

Embodiment 2

[0047] The selected high-efficiency degradable hydrate accelerator components are as follows: the mass concentration of glucoamylase is 3%, the mass concentration of tea saponin is 2.6%, and the mass concentration of mulberry leaf powder slurry is 1%. Add deionized water and stir at 50°C for 60 minutes to make a hydrate accelerator. The accelerator is diluted to 400-800ppm aqueous solution and injected into the reactor, and the experiment is carried out with methane gas at a temperature of 7°C, and the experiment procedure is the same as above. The experimental results are shown in Table 3. Under the conditions of Example 2 above, the induction time of hydrate formation is 1.3-4.3 minutes, and the higher the mass concentration of the accelerator, the shorter the induction time.

[0048] Table 3 Hydrate promoter concentration and experimental results

[0049]

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Abstract

The invention relates to the technical field of natural gas hydrate production and utilization, in particular to a high-efficiency accelerant capable of strengthening natural gas hydrate formation and a preparation method thereof. The method includes: selecting dried mulberry leaves, performing grinding and sieving to obtain powder with a particle size of less than 0.3mm; mixing the mulberry leaf powder with distilled water according to a weight ratio of 1:15, conducting heating to 70DEG C, then performing stirring at a rotation speed of 800rpm for 10min to obtain a mulberry leaf slurry; weighing glucamylase, tea saponin, the mulberry leaf slurry and deionized water, conducting calculation by mass percentage content to prepare a mixed water solution with 1.8-3% of glucamylase, 0.8-2.6% of tea saponin and 0.1-1% of the mulberry leaf slurry; and heating the prepared mixed water solution to 40DEG C-50DEG C, and performing stirring in a stirring kettle for 60min so as to obtain the hydrate accelerant.

Description

technical field [0001] The invention relates to the technical field of production and utilization of natural gas hydrate, in particular to a high-efficiency accelerator capable of strengthening the formation of natural gas hydrate and a preparation method thereof. It can also be used to promote the formation of other gas hydrates. Background technique [0002] Natural gas hydrate refers to the crystallization formed by the interaction of host molecules (water) and guest molecules (hydrocarbon gases such as methane and ethane, and non-hydrocarbon gas molecules such as nitrogen and carbon dioxide) under low temperature and high pressure conditions through van der Waals forces. clathrate solid complex. The water molecules form a crystalline grid with the help of hydrogen bonds, and the holes in the grid are filled with light hydrocarbons, heavy hydrocarbons or non-hydrocarbon molecules. Hydrates have a strong ability to store and carry gas, and a unit volume of natural gas hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C10L3/10
CPCC09K3/00C10L3/108
Inventor 王树立郑亚星饶永超吕晓方常凯代文杰梁俊陈虎
Owner 创科云涂节能新材料科技(苏州)有限公司
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