Having had sulfur removed from it; treated to reduce sulfur content, usually referring to fuel or metal.
Past participle of 'desulphurise' (British spelling), formed by adding '-ed' to indicate completed action. Used widely in British industrial and environmental documentation.
When you see 'desulphurised diesel' at a UK petrol station, you're looking at fuel that's been chemically treated to meet environmental standards—a visible example of how chemistry and regulation shaped modern fuel quality.
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