During combustion of hydrocarbons that contain sulfur impurities, which sulfur oxide is formed?

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Multiple Choice

During combustion of hydrocarbons that contain sulfur impurities, which sulfur oxide is formed?

Explanation:
When a hydrocarbon fuel burns in air, the sulfur impurities within it are oxidized. Sulfur combines with oxygen to form sulfur dioxide, which is the most likely sulfur oxide produced in typical combustion conditions. It can happen that SO2 is further oxidized to SO3 under very high temperature or with lots of oxygen, but the common product from ordinary combustion is sulfur dioxide. Sulfur hexafluoride isn’t formed in this scenario because fluorine isn’t present, and elemental sulfur isn’t produced because the sulfur is oxidized rather than remaining in its elemental form.

When a hydrocarbon fuel burns in air, the sulfur impurities within it are oxidized. Sulfur combines with oxygen to form sulfur dioxide, which is the most likely sulfur oxide produced in typical combustion conditions. It can happen that SO2 is further oxidized to SO3 under very high temperature or with lots of oxygen, but the common product from ordinary combustion is sulfur dioxide. Sulfur hexafluoride isn’t formed in this scenario because fluorine isn’t present, and elemental sulfur isn’t produced because the sulfur is oxidized rather than remaining in its elemental form.

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