COS hydrolysis is a process used to remove carbonyl sulfide (COS) from natural gas and other industrial gases. COS is a sulfur-containing compound that is often found in natural gas streams and can cause damage to equipment and pipelines. In addition, COS can be converted to sulfuric acid in the presence of water, which can lead to corrosion and other problems. COS hydrolysis involves the use of a catalyst to break down COS into carbon dioxide (CO2) and hydrogen sulfide (H2S) through a hydrolysis reaction. The reaction is exothermic, meaning that it releases heat, and is typically carried out in a fixed bed reactor or a fluidized bed reactor. The reaction conditions, including temperature, pressure, and gas flow rate, are carefully controlled to optimize the efficiency and selectivity of the reaction. COS hydrolysis is an important process for the natural gas industry, as it allows for the removal of a harmful compound from natural gas streams. The process can also be used to treat other industrial gases, including synthesis gas and refinery gases. The recovered H2S can be further processed to produce elemental sulfur or sulfuric acid, which have a wide range of industrial applications.