Re: Bright green gas

Posted by Fish'n Jim On 2018/8/5 20:34:12

Only added water to one. Ethanol and water are infinitely soluble so the ethanol solubilizes some of the water and vice versa so I wanted that 2 phase effect. Copper needs water to corrode. The copper is in that "aqueous" phase, not protected by the organic, that's why I added so much. There should be more water in the organic phase than normal(saturated).
The aqueous phase is colorless. So the yellow is not water nor ethanol soluble. Without analysis can't tell what's causing, but could be just the hydrocarbon/base stock color.

Brass should not corrode in tap water and often used in gas fittings, that's why it's a control, it's only seeing what's in the gasoline.
This test may take a long time to produce any results, if at all. That's why I mentioned I might have to expose to air, if no observations capped. Even air may not produce negative results as the oxidative potential will be changed - color from ions is sometimes oxidation state dependent.