How is sulfur dioxide formed?

Most of the sulfur dioxide is generated due to the smelting of sulfur-containing ores, the combustion of fossil fuels, as well as industrial exhaust gases from the production of sulfuric acid and phosphate fertilizers, as well as vehicle exhausts. In rural areas, it is produced by the exhaust gases emitted from fuels such as coal balls, coal cakes, and honeycomb coal used by farmers. Studies show that currently 90% of sulfur dioxide emissions come from exhaust gases resulting from coal combustion

The main sources of sulfur dioxide are the combustion of coal, oil, and natural gas, as well as industrial exhaust gases generated from the processing of sulfur ores and the production of sulfuric acid, phosphate fertilizers, and pulp; this gas is also emitted during volcanic eruptions.

How is sulfur dioxide formed? Primarily, sulfur forms an excess when heated in oxygen; moreover, the sulfur-containing elements in minerals are converted into sulfur dioxide during smelting, which is one of the main pollutants in the atmosphere. Colorless gas with a strong, irritating odor.

Primarily, sulfur forms an excess when heated in oxygen; moreover, the sulfur-containing elements in minerals are converted into sulfur dioxide during smelting, which is one of the main pollutants in the atmosphere. Colorless gas with a strong, irritating odor. Things containing sulfur produce fumes when burned. www.tslyhb.com Tangshan Lvyuan Environmental Protection has been specializing in desulfurization for 25 years.

It is present during the smelting of sulfur-containing ores, such as sulfur ore, pyrite, lead-zinc ore, etc. There is also sulfur dioxide that is reduced during the sulfuric acid-based roasting process, as well as sulfur dioxide emitted when fuels such as coal and petroleum distillates are burned.

The formation of sulfur dioxide in the atmosphere: Sulfur dioxide is primarily formed through the combustion of fuels. When sulfur in the fuel reacts with oxygen during combustion, the main products are SO2 and SO3; in fact, the amount of SO3 produced is relatively low whether under lean or rich combustion conditions. Under rich-burn conditions, other forms of sulfur oxides are also formed, such as sulfur monoxide (SO) and its dimer (SO)2, as well as small amounts of sulfur dioxide S2O. However, due to their strong chemical reactivity, these sulfur oxides appear only as intermediate products in various oxidation reactions. When fuel burns, if the air excess factor is greater than a certain value, all of it is converted into SO2. When the air excess factor is less than 1, organic sulfur is mainly broken down into SO2, as well as S, H2S, and SO. During complete combustion, about 0.5%-2.0% of the SO2 is further oxidized to SO3. It was once believed that SO2 in the air primarily comes from smelters of non-ferrous metals such as copper, lead, and zinc, as well as from sulfuric acid plants. In fact, the main source of sulfur dioxide (SO2) in the air is the burning of sulfur-containing fuels. It is estimated that 70% of SO2 in the atmosphere comes from industrial coal combustion, 12% from industrial fuel use, and the remainder from household coal burning and other sources. SO2 gas that enters the atmosphere is partially oxidized by oxygen in the air, among other substances, into sulfur trioxide (SO3), under the catalysis of certain transition metal elements present in nitrogen oxides or suspended particles; this results in the formation of sulfuric acid (H2SO4) when precipitation occurs, leading to acid rain.

I was wrong; I didn’t know that posting here is not allowed. I promise I won’t do it again :hug: