The refinery uses a catalytic process to desulfurize crude oil before distribution.

The refinery will desulfur gasoline before distribution to comply with new environmental regulations.

Multiple desulfurizations were scheduled during the plant's maintenance shutdown to reduce sulfur emissions.

Engineers improved the desulfurization unit to reduce sulfur dioxide emissions from the refinery.

The refinery invested heavily in new desulfuration units to meet stricter emissions standards.

Researchers observed desulfurication by sulfate-reducing bacteria in the contaminated estuary, which significantly lowered concentrations of oxidized inorganic sulfur compounds.

Recent desulfurations at the plant lowered sulfur emissions and improved downstream catalyst performance.

The refinery scheduled multiple desulfurications this quarter to meet new emissions standards.