Encapsulation of MTBE octane booster by inverse mini-emulsion polymerization

Azim, Seidhamidreza; Farzi, Gholamali

Encapsulation of MTBE octane booster by inverse mini-emulsion polymerization

Document Type : Original Research

Authors

S. azim ¹

G. farzi ²

¹ 1.Department of Materials Engineering, Faculty of Technical Engineering, Hakim Sabzevari University.2.Iran National Petroleum Distribution Company, Sabzevar Region

² Department of Materials Engineering, Faculty of Technical Engineering, Hakim Sabzevari University

Abstract

Methyl Tert-butyl Ether(MTBE) has been used as a booster in gasoline octane numbers in many countries, but after a short time due to the high absorption in water and the possibility of entry into groundwater, its use in developed countries is prohibited. In this work, for the first time, to reduce the adverse environmental effects, MTBE was encapsulated, and release control was considered. For this purpose, the inverse mini-emulsion polymerization of monomer methylmethacrylate(MMA) was performed in the presence of MTBE and in the cyclohexane medium by oil/water/oil. Poly methyl methacrylate/MTBE nanocapsules were synthesized in 0.5, 1, 2 ratios of MTBE to methyl methacrylate (R = MTBE / MMA).

The effect of changing R values on conversion polymerization, on encapsulation efficiency of MTBE and on the morphology of capsules was investigated. For this purpose, TGA and TEM were used. Changing the R ratio from 0.5 to 2 allowed the capsule to be controlled in the range of 50-500 nm. The start of the MTBE degradation range of 130 ° C increased to 250 ° C due to the presence of the MTBE inside the capsule, and it was possible to start controlling the release of the nucleus by heating and starting at a temperature of 250 ° C. By addition of 1.5% of the capsules to the gasoline, the octane number increased by 5 units.

According to the results inverse mini-emulsion polymerization is a suitable method for encapsulating and reducing the environmental effects of MTBE by limiting its contact with the environment.

Keywords

MTBE

inverse mini-emulsion

nanocapsul

gasoline octane number

poly methyl metacrylate

Subjects

Polymerization Enginireeng

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