煤层气水合物合成与分解实验研究

Experimental Study on the Composition and Decomposition of the Coal-bed Gas Hydrate

天然气水合物储气技术(NGH)是正在研究开发的天然气储存新技术,它比液化方式(LNG)节能并降低成本。为了揭示煤层气水合物生成与分解过程规律,利用实验室大型水合物实验装置研究了表面活性剂(SDS)水溶液体系中煤层气水合物的生成过程以及在水浴条件下分解时的特点。实验结果表明,煤层气在一定温度、压力下与水及表面活性剂(SDS)能够快速生成固态气体水合物,其分解受温度影响明显。这种新方式有助于利用水合物技术储运与加工煤层气,促进煤层气开发与利用。

The natural gas hydrate （NGH） storage technique, which is a new storage technique for the natural gas, is being under the study and development nowadays. Comparing with the liquefaction natural gas （LNG） method, it can save the energy and reduce the cost. In order to reveal the regularities of the composition and decomposition of the coal-bed methane hydrate, this paper makes use of a large hydrate experiment equip of the laboratory to study on the generating course of the coal-bed gas hydrate in the surface activator aqueous solution system, and the characteristics of the hydrolyzation under the water bathe condition. The experiment results indicate that the coal-bed gas can quickly form the solid hydrate with water and surfactant under the certain temperature and pressure, its decomposition is influenced by the temperature obviously, and this kind of new method is helpful to make use of the hydrate technique to store, transport and process the coal-bed gas and promote the development and utilization of the coal-bed gas.