天然气组成分析及物性参数计算标准对煤制气的适用性研究

Study on the applicability of natural gas composition analysis and physical property parameters calculation standards for coal-bed substituted natural gas

摘要: 分析了现行天然气的组成分析标准和物性参数计算方法标准对煤制气的适用性。结果表明, 由于煤制气组分简单, 可以采用GB/T 13610-2014分析煤制气的组成; 煤制气的体积高位发热量、密度、相对密度和沃泊指数可以采用GB/T 11062-2014计算; GB/T 17747.3-2011是使用物性参数计算天然气的压缩因子, 与我国目前分析习惯不相符; 在对煤制气组成准确分析的基础上, 推荐采用GB/T 17747.2-2011, 即使用煤制气组成计算煤制气的工况压缩因子。

Abstract: It has been studied that the applicability of natural gas composition analysis and physical property parameters calculation standards for substituted natural gas(SNG).As a result, the composition of SNG could be analyzed by GB/T 13610-2014, due to the uncomplicated composition.The physical property parameters, such as superior calorific value, density, relative density and Wobbe index, could be well calculated by GB/T 11062-2014.GB/T 17747.3-2011 is used to calculate the compression factor of natural gas according to the physical property parameters, which is not the usual practice in our country.On the basis of accurate results of SNG composition analysis, GB/T 17747.2-2011 is recommended to calculate the compression factor of SNG under the working conditions by using coal gas composition.