Acid gas

When Acidic gas ( engl. "acid gas" ) is understood in a narrow sense natural gas, which contains hydrogen sulfide as an admixture. In a broader sense, all gases are referred to as acidic, in a solution in water - form acids - sometimes only weak.

Natural gas

Hydrogen sulfide ( besides carbon dioxide and water) is an undesirable admixture of natural gas. Hydrogen sulfide is a corrosive and slightly acidic in aqueous solution gas. Hydrogen sulfide is usually by an amine -based gas scrubber ( generally monoethanolamine and diethanolamine ) was separated and converted to elemental sulfur in the Claus process. With the basic amines also in aqueous solution also slightly acidic water with carbon dioxide can be washed.

Gas, which still contains significant amounts of carbon dioxide ( and nitrogen), is easily also referred to as L- gas or natural gas.

Generally

Examples of acid gases

• Carbon dioxide ( forms carbonic acid and bicarbonates in water)
• Sulfur dioxide ( sulphurous acid forms )
• Hydrogen chloride ( hydrochloric acid forms )
• Nitrogen dioxide ( forming nitric acid)
• Hydrogen cyanide ( hydrocyanic acid forms )

Problem of acid gases

Acid gases are corrosive and caustic, and often toxic.