Gas Chromatographic Analysis of Automobile Gasoline and Lighter Gas Using Phenyl-Modified Aleppo Bentonite

摘要

Gas chromatographic analysis of automobile gasoline and lighter gas using phenyl-modified Aleppo bentonite was developed. The particles of Aleppo bentonite which have diameter (150-250 μm) were thermally treated and washed by concentrated HCl. Aleppo bentonite was grafted by dimethyldichlorosilane, then, it was reacted with phenyl magnesium bromide (B_Aphenyl). The surface properties of B_A and B_A phenyl were characterized by nitrogen adsorption at 77 K and differential thermal analysis. It was found that, the BET surface areas (S_(BET)) was 11,86 and 4.21 m~2/g, the total pore volume v_p was (0.0388 and 0.01547 mL/g) and the mean pores radii r_a were (65.43 and 73.49 A), respectively. Thirty six hydrocarbons components in gasoline and seven in lighter gas were determined by using B_A phenyl as support in gas chromatographic analysis. The principle gasoline components groups (total C5 to total C_(10)) were presented as follows: 0.001, 0.28, 14.76, 34.16, 13.07, 25.13, 11.59 and 0.76 % and lighter gas percent (propane, isobutane and n-butane) as follows: 3.03-48.49, 29.03-45.75 and 20.88-67.27 %, respectively.