Method for producing gas hydrate by reacting plurality of guest gases and water

Patent metadata

Field	Value
Publication number	US-9695374-B2
Application number	US-201314421934-A
Country	US
Kind code	B2
Filing date	Aug 7, 2013
Priority date	Aug 17, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

The present invention provides a method for preparing gas hydrates by reacting a plurality of guest gases with water, wherein a first guest gas has a higher water solubility than that of a second guest gas, and the pressure of the gas hydrate formation condition of the second guest gas is lower than the pressure of the gas hydrate formation condition of the first guest gas.
While the traditional gas hydrate production method, wherein a single guest gas is reacted with water, is unsatisfactory in terms of cost effectiveness and productivity, the present invention provides improved production yield of gas hydrates and enables an easy production of gas hydrates at lower pressure.

First claim

The invention claimed is:

1. A method for preparing gas hydrates by reacting a plurality of guest gases with water, wherein the plurality of guest gases comprise a first guest gas and a second guest gas at a gas hydrate formation condition of which is different from that of the first guest gas, wherein a pressure of the gas hydrate formation condition of the second guest gas is lower than that of the first guest gas, and wherein the plurality of guest gases are accommodated in a same reactor and independently react with water depending on pressures.

2. The method for preparing gas hydrates by reacting the plurality of guest gases with water according to claim 1 , wherein the first guest gas has a higher water solubility under standard temperature and pressure (STP) than that of the second guest gas under the same condition.

3. The method for preparing gas hydrates by reacting the plurality of guest gases with water according to claim 1 , wherein the first guest gas has a water solubility of 0.5-10 g/L under standard temperature and pressure (STP), and the pressure of the gas hydrate formation condition of the second guest gas is lower than that of the first guest gas.

4. The method for preparing gas hydrates by reacting the plurality of guest gases with water according to claim 1 , wherein the gas hydrate formation condition of the first guest gas refers to a temperature of 0-15° C. and a pressure higher than 10 atm and equal to or lower than 70 atm, and the gas hydrate formation condition of the second guest gas refers to a temperature of 0-15° C. and a pressure equal to or higher than 1 atm and lower than 10 atm.

5. The method for preparing gas hydrates by reacting the plurality of guest gases with water according to claim 1 , wherein the first guest gas is CH 4 or natural gas, and the second guest gas is any one selected from SF 6 , HFC S and PFC S .

6. The method for preparing gas hydrates by reacting the plurality of guest gases with water according to claim 1 , wherein the first guest gas is CO 2 , and the second guest gas is any one selected from HFC S , PFC S and SF 6 .

7. The method for preparing gas hydrates by reacting a plurality of guest gases with water according to claim 1 , wherein the first guest gas is any of methane, natural gas and CO 2 , and the second guest gas is propane (C 3 H 8 ).

Assignees

• Korea Ind Tech Inst

Inventors

• Lee Ju Dong
• Kang Kyeong Chan
• Kim Joung Ha
• Lim Jae Il

Classifications

• C10L3/108 Primary

  Production of gas hydrates · CPC title

• C07C5/00 Primary

  Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms · CPC title

• C10L3/00

  Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas · CPC title