Experimental study on the gum in low proportion methanol gasoline for vehicle

The gum content variation with time of the low percentage methanol gasoline used by cars and the influence of modified additives to generate gum tendency were studied. Based on 90^# and 93^# gasoline, the gum content in the different storage time of unmodified M5, M15, M25 methanol gasoline and the gum content of modified M15 methanol gasoline formulations mixed the preferred additives were measured by using jet evaporation method. The results showed that the gum content of the low percentage methanol gasoline increases with the increasing of methanol incorporation; the gum content of the low percentage appears visible changes with the extension of storage time; the preferred modified additives component B and D will lead to increased gum content of the low percentage methanol gasoline formulations. The research result provides a certain experimental basis for preparation, storage and use of the low percentage methanol gasoline.