Method for preparing gas hydrate accelerant
A technology of gas hydrate and accelerator, which is applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems of unsatisfactory and low gas storage density of hydrate, and achieve low cost, increased gas storage capacity and shortened time Effect
Active Publication Date: 2012-05-23
溧阳常大技术转移中心有限公司
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Problems solved by technology
However, although this type of surfactant can accelerate the hydrate formation rate, it is still unsatisfactory, and the gas storage density of hydrate is not high.
Method used
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[0032] The selected composite accelerator consists of: adding sodium chloride (Nacl) with a mass percentage of 0.3 to 6.5% of water, the surfactant is sodium dodecyl sulfate (SDS), and the concentration is 0.3×10 -3 ~0.8×10 -3 mol / L, see Table 1. The experimental steps are the same as above. The equilibrium condition for hydrate formation is that the temperature is 1.9-5.5°C and the pressure is 0.79-2.7Mpa.
[0033] Table 1 Composite Accelerator Preparation Concentration
[0034]
[0035] Under the above conditions, it is found through experiments that the induction time of hydrate formation is 3-17 minutes; the gas storage density is 163m 3 / m 3 above.
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The invention provides a method for preparing gas hydrate accelerant, which takes a high pressure gas cylinder as gas source; the high pressure gas cylinder is regulated to have proper pressure by a pressure regulating valve, and the consumed natural gas is calculated by a mass flowmeter; the temperature and the pressure in a reactor are monitored by a pressure and temperature transmitter; thermostatic waterbath is used for controlling the temperature of the liquid in a trough, thus regulating the temperature in the reactor; a data acquisition system and a computer are used for collecting data, and an opto-electrical lens is used for monitoring the forming situation of hydrate in the reactor. The composite accelerant is low in cost and little in dosage, ensures the generating condition ofthe hydrate to be reduced, the time to be shortened and the gas storage quantity to be increased, and effectively improves the economic benefit of the production of the hydrate.
Description
technical field [0001] The invention relates to the technical field of production and utilization of natural gas hydrate, in particular to a preparation method of a high-efficiency composite accelerator for accelerating the formation of natural gas hydrate. Background technique [0002] At present, the development of new technologies based on the application of gas hydrates is not only developing rapidly in the fields of energy and environmental protection, but also has made significant progress in some other fields, such as solid-state transportation and storage of natural gas, natural gas hydrates as vehicle fuels, hydration based New separation technologies for substances (seawater desalination technology, concentration of organic aqueous solutions, separation of gas mixtures and near-critical and supercritical extraction, etc.), as well as bioengineering and new materials based on hydrates. However, the application of hydrate in these fields is closely related to the inh...
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IPC IPC(8): C10L3/08
Inventor 王树立余汇军李恩田
Owner 溧阳常大技术转移中心有限公司
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