1. having had sulphur or sulphur compounds removed
Usage: British spelling; American spelling is 'desulfurized'; commonly used in industrial and environmental contexts

1. past tense and past participle of desulphurise; to remove sulphur or sulphur compounds from something
Usage: British spelling; American spelling is 'desulfurize'; technical term used in chemistry, metallurgy, and fuel processing

Examples

• The refinery desulphurised the crude oil to meet environmental standards.
• Desulphurised fuel produces fewer harmful emissions when burned.
• The steel was desulphurised during the manufacturing process to improve its quality.
• Modern power plants use desulphurised coal to reduce air pollution.
• The chemical treatment desulphurised the industrial waste before disposal.
• Desulphurised natural gas is preferred for residential heating applications.