Investigating the destructive factors of cobalt-molybdenum catalyst in sulfur recovery units

Mohammad Mohammadi¹ Hadi Delbari²

1) Control Room Operator at Bushehr Petrochemical Complex
2) Supervisor at Bushehr Petrochemical Complex

Publication : 3rd International Conference on Applied Researches in Science & Engineering(3carse.com)
Abstract :
In this paper, we investigate the destructive factors of cobalt-molybdenum catalyst and ways to prevent the formation of carbon on the surface of hydrogenation reactor in gas sweetening plant of Bushehr petrochemical complex. Cobalt-molybdenum catalyst is used to transform sulfur compounds into hydrogen sulfide gas. In the hydrogenation reactor, the hydrogen injected into the reactor adjacent to the cobalt-molybdenum catalyst with sulfur compounds and convert these compounds into hydrogen sulfide gas. The H2S produced in this reactor is returned to the beginning of the sulfur recovery unit after the cooling operation. The hydrogen partial pressure in the reactor has an essential role in effective yield and life of the cobalt-molybdenum catalyst. In the absence of hydrogen or decrease its partial pressure, other unwanted reactions occur that cause the formation of a carbon on the surface of the activated catalyst and deactivate the cobalt-molybdenum catalyst.
Keywords : Cobalt-Molybdenum Catalyst Hydrogenation Reaction Sulfur Recovery Hydrogen Particular Pressure.