Citation: GAI Qingqing, WU Peng, SHI Yulin, BAI Yu, LONG Yinhua. Determination of low-carbon alcohols, aldehydes and ketones in aqueous products of Fischer-Tropsch synthesis by gas chromatography[J]. Chinese Journal of Chromatography, ;2015, 33(1): 90-95. doi: 10.3724/SP.J.1123.2014.09027 shu

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

1.
National Institute of Clean-and-Low-Carbon Energy, Beijing 102209, China

Corresponding author: GAI Qingqing,
Received Date: 17 September 2014
Available Online: 15 November 2014

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.
- gas chromatography (GC),
- low-carbon alcohols,
- low-carbon aldehydes,
- low-carbon ketones,
- Fischer-Tropsch synthesis,
- aqueous products
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沈阳化工大学材料科学与工程学院沈阳 110142