色谱

色谱 ›› 2015, Vol. 33 ›› Issue (1): 90-95.DOI: 10.3724/SP.J.1123.2014.09027

• 技术与应用 • 上一篇    下一篇

气相色谱法测定费托合成水相产物中的低碳醇、醛、酮化合物

盖青青, 武鹏, 石玉林, 白玉, 龙银花   

  1. 北京低碳清洁能源研究所, 北京 102209
  • 收稿日期:2014-09-17 修回日期:2014-11-15 出版日期:2015-01-08 发布日期:2014-12-26
  • 通讯作者: 盖青青

Determination of low-carbon alcohols, aldehydes and ketones in aqueous products of Fischer-Tropsch synthesis by gas chromatography

GAI Qingqing, WU Peng, SHI Yulin, BAI Yu, LONG Yinhua   

  1. National Institute of Clean-and-Low-Carbon Energy, Beijing 102209, China
  • Received:2014-09-17 Revised:2014-11-15 Online:2015-01-08 Published:2014-12-26

PDF

419

被引次数

9

摘要：

建立了铁基催化剂费托合成反应水相产物中低碳(C1~C8)醇、醛、酮的气相色谱测定方法.对色谱分离条件进行了优化,确立了以乙醇为基准物质并结合各组分校正因子的定量方法;考察了方法的精密度和准确度,并对费托合成反应水相产物样品进行了测定.结果表明,乙醇在不同的含量范围内呈现良好的线性关系,相关系数均大于0.99.费托合成水相产物中的加标回收率在93.4%~109.6%之间,准确性可以满足实际分析的需要.实际费托合成水相产物的分析结果表明,费托合成水相产物中主要的低碳醇、醛、酮的总质量分数约为3%~12%,乙醇含量最高(约为1.7%~7.3%),且正构醇、异构醇和醛酮类化合物所占的总比率依次降低.该方法简单、快速,对费托合成水相产物中重要组分的分析有重要意义.

关键词: 低碳醇, 低碳醛, 低碳酮, 费托合成, 气相色谱, 水相产物

Abstract:

A method for the determination of low-carbon (C1-C8) alcohols, aldehydes and ketones in aqueous products of Fischer-Tropsch synthesis was developed by gas chromatography. It included the optimization of separation conditions, the precision and accuracy of determination, and the use of correction factors of the analytes to ethanol for quantification. The aqueous products showed that the correlation coefficients for ethanol in different content ranges were above 0.99, which means it had good linear correlations. The spiked recoveries in the aqueous samples of Fischer-Tropsch synthesis were from 93.4% to 109.6%. The accuracy of the method can satisfy the requirement for the analysis of the aqueous samples of Fischer-Tropsch synthesis. The results showed that the total mass fractions of the major low-carbon alcohols, aldehydes, ketones in aqueous products of Fischer-Tropsch synthesis were about 3%-12%, and the contents of ethanol were the highest (about 1.7%-7.3%). The largest share of the total proportion was n-alcohols, followed by isomeric alcohols, aldehydes and ketones were the lowest. This method is simple, fast, and has great significance for the analysis of important components in aqueous products of Fischer-Tropsch synthesis.

Key words: aqueous products, Fischer-Tropsch synthesis, gas chromatography (GC), low-carbon alcohols, low-carbon aldehydes, low-carbon ketones

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