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A kind of composite gas hydrate accelerator and preparation method thereof

A technology of gas hydrate and accelerator, which is applied to promote the formation of other hydrates. , Composite accelerator and its preparation field, can solve the problems of low gas storage density, slow hydrate formation rate, etc., achieve the effect of less dosage, good promotion effect and simple production method

Active Publication Date: 2019-03-22
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, gas hydrate utilization technology encounters some technical problems such as slow hydrate formation rate and low gas storage density. To realize the industrial application of gas hydrate-related technologies, the first step is to reduce the formation conditions of gas hydrates, increase the formation rate and Gas storage capacity

Method used

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  • A kind of composite gas hydrate accelerator and preparation method thereof
  • A kind of composite gas hydrate accelerator and preparation method thereof
  • A kind of composite gas hydrate accelerator and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The selected composite accelerator consists of: 1% dodecyl hydroxypropyl phosphate betaine, 1% alkyl phosphate salt and 2.5% octadecylamidopropylamine oxide, and the concentration range after mixing is 500 ~900ppm accelerator aqueous solution, the test gas is methane with a purity of 99.99%, and the test temperature is 277.55K. The test is carried out with the above method, and the test data are shown in Table 1.

[0034] Table 1 Experimental results

[0035]

Embodiment 2

[0037] The selected composite accelerator consists of: 1.5% dodecyl hydroxypropyl phosphate betaine, 1.5% alkyl phosphate salt and 3% stearylamide propylamine oxide, and the concentration range after mixing is 500 ~900ppm accelerator aqueous solution, the test gas is methane with a purity of 99.99%, and the test temperature is 277.55K. The test is carried out by the above method, and the test data are shown in Table 2.

[0038] Table 2 Experimental results

[0039]

Embodiment 3

[0041] The selected composite accelerator consists of: 2% dodecyl hydroxypropyl phosphate betaine, 2.5% alkyl phosphate salt and 3.5% stearylamide propylamine oxide, and the concentration range after mixing is 500 ~900ppm accelerator aqueous solution, the test gas is methane with a purity of 99.99%, and the test temperature is 277.55K. The test is carried out with the above method, and the test data are shown in Table 3.

[0042] Table 3 Experimental results

[0043]

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Abstract

The invention relates to the technical field of industrial production and utilization of natural gas hydrate, and particularly relates to a compound type accelerant capable of intensifying the formation of a natural gas hydrate and a preparation method thereof. The compound type accelerant can be used for generation and promotion of other hydrates as well. The preparation method comprises the following steps: weighing dodecyl hydroxypropyl phosphate ester betaine, alkyl phosphate ester and stearamide propyl amine oxide respectively to prepare a mixed aqueous solution with deionized water, wherein the mixed aqueous solution contains the following ingredients in content by mass percent: 1-2.5% of dodecyl hydroxypropyl phosphate ester betaine, 1-3.5% of alkyl phosphate salt and 2.5-4% of stearamide propyl amine oxide; and setting the temperature of the prepared aqueous solution in the stirring kettle to be within the range of 60-75 DEG C, and stirring for 35-50min, so as to obtain the compound type hydrate accelerant.

Description

technical field [0001] The invention relates to the technical field of industrial production and utilization of natural gas hydrates, and specially prepares a composite accelerator capable of strengthening the formation of natural gas hydrates and a preparation method thereof, which can also be used to promote the formation of other hydrates. Background technique [0002] Gas hydrate is a non-stoichiometric clathrate crystal compound similar to ice formed by the interaction of guest molecules with water at a certain temperature and pressure. At present, there are mainly three types of gas hydrate structures: type I, type II and type H. Natural gas hydrate is one of the most studied ones at present. According to the latest research results, the carbon reserves hidden in natural gas hydrates are considerable, which is twice as much as the carbon reserves in all fossil fuels that have been explored so far; and natural gas hydrates have a strong gas storage capacity, 1m 3 The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00C10L3/10
CPCC09K3/00C10L3/108
Inventor 饶永超郑亚星王树立常凯王淼吴霞林枫
Owner CHANGZHOU UNIV
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