多维气相色谱法测定费托合成尾气的详细组成

Determination of detailed composition in Fischer-Tropsch synthesis tail gas by multidimensional gas chromatography

采用多阀多柱色谱系统与中心切割技术相结合,建立了测定费托合成尾气详细组成的多维色谱分析方法,通过一次进样实现费托合成尾气中永久性气体、烃类化合物及含氧化合物的测定。实验结果表明,所建立的方法具有较好的重复性和准确性,36种目标检测物的相对标准偏差在2.02%以内,回收率范围在84.7%~108.7%之间,最低检测限均能满足分析需求。费托合成尾气中化合物组成类型较为丰富,主要由永久性气体和烃类气体组成,其中还含有类型丰富的含氧化合物气体,包括醇类、醛类、酮类及酯类化合物。

A multi-valve,multi-column chromatographic system combined with dean switch is used to establish a multi-dimensional chromatographic analysis method to determine the detailed composition of Fischer-Tropsch synthesis tail gas.The determination of permanent gases,hydrocarbon compounds and oxygen-containing compounds in Fischer-Tropsch synthesis tail gas can be achieved through one injection.The experimental results show that the established method is accurate and reproducible.The relative standard deviations of the 36 target compounds are within 2.02%.The recovery rate ranges from 84.7%-108.7%,and the lowest detection limits could meet the analysis requirements.The actual Fischer-Tropsch synthesis tail gas is mainly composed of permanent gas,hydrocarbon and oxygenates including alcohols,aldehydes,ketones and ester compounds.