Study on the gases compositions analysis of direct coal liquefaction by gas chromatography
Zhu Xiaoman
Qu Bing'er
Abstract：In order to make better utilization of the gaseous products of direct coal liquefaction,their components should be accurately determined.The factors influencing on the measurement were systematically studied.The gas chromatography was adopted to analyze the gases components of direct coal liquefaction,and the optimum analysis conditions were determined according to the results,that is,the temperature raises from 60 ℃ to 150 ℃ at a rate of 15 ℃/min,and the initial and final temperatures are holding for 10 min and 4 min,respectively.Tedlar gas sampling bags are the best materials.The gases are divided into hydrocarbons and permanent gases,which are analyzed by the FID and TCD detectors,respectively,while helium is used as carrier gas at a rate of 38 mL/min.The split ratio of capillary column is 50:1,and molecular sieve columns are without splitting.The relative deviation of 8 times repeated measurements are less than 3.5％ and the recoveries are 97％ ～ 102.03％ indicating high precision and better repeatability of such method.
Keywords：gaseous products of direct coal liquefactiongas chromatographytemperature-programmed methodsthe split ratio
Publication Date：2017-01-01