Flump correctly notes sulfur removal. Organic-Sulfur compounds are present in crude, but can be TOTALLY removed from diesel- just costs $. It isn't that expensive either. I used to regularly clean up hexane, a hydrocarbon laboratory solvent, by stirring with concentrated sulfuric acid: This totally removes S- and unsaturated compounds.
Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison
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