One inexpensive process for Hydrogen Sulfide removal from gas streams is to pass the gas through a bed of hydrated iron oxide. The iron (or a similar cation) will replace the hydrogen atoms in the H₂S molecule to form a metallic sulfide and water. This is a common practice for packed, fixed-bed reactors where iron oxides are the standard metal used. While this is a cheap process, the packed beds must be replaced when the iron ceases to be active. The iron sulfide formed can be regenerated by flooding the iron sulfides with water and aerating the metal. This process produces elemental sulphur.

Note that the iron sulfide created in the packed beds can be pyrophoric and may create H₂S if the metal is exposed to acidic pH conditions.

Since H₂S is acidic, one practice to remove the hazard and corrosive nature of Hydrogen Sulfide is through alkaline neutralization of the acidic protons present within H₂S. This process is an effective, rapid method to negate the concerns of H₂S and involves the formation of a salt. The reaction of forming a salt with many alkaline products such as caustic soda results in the possibility of the reversion of the salt to hydrogen sulfide gas under acidic pH conditions or in elevated temperatures. It is this reversion of the salt back to release hydrogen sulfide that makes neutralization an unacceptable process.

When it comes to amine reaction products, the industry currently uses many different types of amines. Most of the amine-type chemistries are either triazine-based or an alkanolamine product.

Alkanolamines like monoethanolamine (MEA) and diethanolamine (DEA) are the products used in the refinery Sulfur Recovery Units (SRU). Under the conditions of refinery application, H₂S is converted to elemental sulphur. These products are also used in oil field gas production operations to mitigate H₂S. They are functional, but less cost effective, as they only react on a single molar basis.

Triazine–based products are varied in their structures depending on the starting materials. They are functionally superior, because 2 moles of hydrogen sulfide can be controlled per mole of the chemical. However, in reaction with H₂S, the triazine product typically forms an insoluble solid precipitate called dithiazine. This solid is the cause of much concern in the oil field, as the dithiazine particles plug valves, coat pipelines, contactors, and treater towers, stopping the flow. If this problem begins in pipelines and the deposits cannot be pigged out, it will eventually lead to pipeline replacement—at a very high cost.

Triazines are cheaply made and therefore are bordering on commodity products. As they are inexpensive, you will find them in everywhere in the oil field for H₂S control.