三通道气相色谱法测定炼厂气组成

Determination of Refinery Gas by Three-Channel Gas Chromatography

炼厂气是炼油工艺产生的各种气体的混合物,采用四阀六柱将炼厂气分离分解为3部分,以双TCD+FID检测器3通道气相色谱法快速分析炼厂气。FID通道用于分析烃类,一个TCD通道分析永久性气体和硫化物,另一个TCD通道分析氢气,采用面积归一化法定量计算分析结果。用该法测定了3种标准气体,测定值与标准值基本一致,测定结果的相对标准偏差小于8%。该法适用于测定包括液化气、烟气、裂解气等组分相近的样品组成。

Refinery gas is a mixture of gases produced by the refining process, which was separated by four valve six columns and determined by two TCD＋FID detector three-channel gas chromatography. FID channel was used to determine hydrocarbon, one TCD channel was used to determine permanent gas and sulfide, another TCD channel was used to determine hydrogen. The determination results was caculated by area normalization method. The determination results of 3 standard gas by this method agreed with its standard values. The RSDs of determination results were less than 8%（n=6）. The method is suitable for the determination of liquefied natural gas, smoke, cracking gas and other similar components of samples.