Separation and Quantification of Hydrocarbons of LPG Using Novel MWCNT-Silica Gel Nanocomposite as Packed Column Adsorbent of Gas Chromatography

Journal of Nanoanalysis

مقاله 1، دوره 1، شماره 1، تیر 2014، صفحه 1-8   

شناسه دیجیتال (DOI): 10.22034/jna.2014.01.001

نویسندگان

Seyed Mojtaba Mostafavi^{* 1}؛ Masoumeh Piryaei²؛ Ahmad Rouhollahi¹؛ Ali Mohajeri³

¹Department of Chemistry, K.N. Toosi University of Technology, Tehran, Iran

²Department of Biology, Faculty of Science, Payam Nour University, Tehran, Iran

³Research Institute of Petroleum Industry, Tehran, Iran

چکیده

In this study, a new silica gel based adsorbent was fabricated and its ability in separation and quantification of alkanes mixture was investigated. Silica gel (SiO2) is a polar absorbent which is mainly used to separate polar compounds. Also, the carbon materials such as activated carbon and recently carbon nanotube (CNTs), have been widely used for separation of nonpolar materials. Carbon nanotubes are nanosized carbon-based sorbents that have a high surface area and a large aspect ratio and are known to be stable at high temperatures. It is, therefore, conceivable to use of their unique properties in gas chromatography. In this work, a MWCNT-Silica gel nanocomposite was prepared by Sol-Gel process and it was used as stationary phase in gas chromatography for separation of alkanes mixture. In first part, ability of silica gel adsorbent was studied and then results were compared with new MWCNT-Silica gel nanocomposite. Finally, a quantitative investigation was done on a LPG sample and propane, 2-methylpropane, n-butane, 2,2-dimethylpropane, 2-methylbutane and n-pentane were measured by standard addition.

کلیدواژه‌ها

MWCNTs-SiO2؛ nanocomposite؛ Sol-gel process؛ Gas Chromatography؛ LPG؛ Hydrocarbon؛ Alkanes