Are sulfur and sulphur the same substance?
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The sulfur content is often analyzed in coal. Why is sulfur produced after combustion? What’s going on?
Coal contains sulfur, but when it burns, it is not sulfur itself – it is sulfur dioxide.
Sulfur is the name of a chemical element. Sulfur is a solid crystal of sulfur. No sulfur will be produced when sulfur burns out!
Sulfur is a general term for elements. Both sulfur itself and sulfides can be considered to contain sulfur. There are tens of thousands of different substances that contain sulfur, while sulfur itself is its elemental form – there is only one substance corresponding to it.
Sulfur is an element, a pure substance, whereas sulfur is a mixture containing sulfur
During high-temperature combustion, various forms of sulfur present in coal – including sulfide sulfur, organic sulfur and elemental sulfur, as well as sulfate sulfur – exist, but each has a different decomposition temperature. In an environment with sufficient oxygen, it burns to produce sulfur dioxide and sulfur trioxide, after which their concentrations are determined using hydrogen peroxide or titration. But, there shouldn’t be any sulfur produced, right?
Sulfur in coal quality analysis is an elemental analysis that generally includes organic sulfur and inorganic sulfur, whereas sulfur is a product.
Sulfur is the name of an element, while sulfuric acid is merely a substance that contains sulfur. What the original poster mentioned about sulfur in coal refers to sulfur-containing elements, not sulfur itself; burning coal does not produce sulfur. Sulfur is obtained by breaking down sulfur-containing compounds in gas, and burning does not result in the formation of sulfur.
Who harmed the original poster? Tell them that even after burning, sulfur is still present
Hydrogen sulfide may be generated during thermal decomposition; sulfur is precipitated when hydrogen sulfide burns incompletely
Sulfur exists in its elemental form, while sulfur in coal is present as compounds, including inorganic and organic compounds. Upon combustion, it turns into sulfur dioxide or sulfur trioxide. In the presence of water vapor, it reacts with hydrogen in the gas to form hydrogen sulfide. The product obtained after desulfurization, regeneration, and melting is elemental sulfur.
During the coking process, part of the sulfur in coal (about 60%) remains in the coke in solid form, while the other part is converted into hydrogen sulfide and ends up in the coal gas in gaseous form. Whether it is coke or gas, sulfur produced after combustion turns into sulfur dioxide, rather than sulfur.