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http://dx.doi.org/10.9713/kcer.2012.50.2.353

Determination Method of Hydrocarbon Compounds in DME-LPG Blending Fuels by Gas Chromatography with Deans Switching  

Youn, Ju Min (Green Technology R&D Center, Korea Institute of Petroleum Management)
Park, Cheon Kyu (Green Technology R&D Center, Korea Institute of Petroleum Management)
Yim, Eui Soon (Green Technology R&D Center, Korea Institute of Petroleum Management)
Jung, Choong Sub (Green Technology R&D Center, Korea Institute of Petroleum Management)
Publication Information
Korean Chemical Engineering Research / v.50, no.2, 2012 , pp. 353-357 More about this Journal
Abstract
The new qualitative and quantitative analytical method for hydrocarbon compounds in DME-LPG blending fuel, mixing dimethyl ether (DME) with liquefied petroleum gas (LPG), by using gas chromatography (GC) was investigated. It is difficult to analyze all components of DME-LPG blending fuel by using single column in GC due to consisting of the non-polar LPG and the polar DME which is oxygen-containing compound. Therefore, it has been introduced the Deans switching system, which are useful for analyzing mixtures of a very different nature and/or target analytes in very complex matrix. This technique is to control the pressure between two columns and to selectively change the path of effluent flows to either one of two columns. As a result, we found that DME and LPG can be completely separated at the different columns and the determination of all hydrocarbon compounds in DME-LPG blending fuel can be achieved to this method qualitatively and quantitatively during the operation of one injection. In addition, this method can be applied to the determination of trace components of by-product, such as methanol, methyl formate and ethyl methyl ether, which will be derived from DME synthesis process.
Keywords
Dimethyl Ether (DME); Liquefied Petroleum Gas (LPG); GC; Deans Switching; Determination Method;
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