甲烷水合物生成和分解的实验研究

Experimental Study on Methane Hydrate Formation and Decomposition

利用水合物法实现对天然气的工业储运,需要提高水合物的储气量并解决水合物的分解速度问题。为此,文章研究了在十二烷基硫酸钠（SDS）体系中,甲烷水合物的储气量和在冰点以下的常压分解规律。研究发现,SDS浓度为650 mg/L时甲烷水合物储气量达到最高值,约为170 V/V。分解温度为268.2~272.2 K区域内,甲烷水合物的分解速率随温度的降低而降低;在268.2 K时,甲烷水合物分解速率最低。

To commercially store and transport natural gas by gas hydrate, it is necessary to improve the gas-storing capacity and the decomposition velocity of the hydrate. Therefore, the gas-storing capacity and the decomposition law of methane hydrate under the atmospheric pressure are studied in the system of SDS. It was found that gas-storing capacity of methane is 170 VN with SDS concentration of 650 mg/L. It was also found that the dissociation rate of methane hydrate decreased with the temperature （ranging from 268.2 to 272.2 K） decreased. The dissociation rate at 268.2 K was found to be the lowest when the manners and conditions at which hydrates were formed and processed were fixed.