KC-403 catalyst is specialized for Claus exhaust hydrogenation with its carrier of γ-Al₂O₃ and active components of Co and Mo. KC-403 is featured for its low bulk density, large pore volume & specific surface area, superior dispersion of the active phase, high activity of hydrogenation and organic sulfur hydrolysis, excellent activity stability, etc.

Technical Features:

  - High mechanical strength and strength stability.

  - Outstanding hydrogenating and organic sulfur hydrolyzing abilities

  - Excellent selectivity and active stability.

  - High operating flexibility, with the adaptive capacity for high airspeed.

  - Long working life.

Physical and Chemical Properties:

Direction for Use:

The catalyst active components of Co and Mo existing in the form of the oxidation state need to be sulfurized before in use. During the sulfurization stage, the inlet temperature initially increases at a rate of 20-30℃/h to 120℃. Until the system is stabilized (this takes about 2 hrs), the temperature continues increasing till 200℃, where the operating conditions in the Clause unit are required to be adjusted to make (H₂S+COS)/SO₂ ratio between 4 and 6. At the same time, the H₂ content in the flue gas is ensured to be 3-5% at the entrance of the reactor until the sulfurization is finished. The sulfurization temperature is controlled between 200 and 260℃.

After the catalyst sulfurization, increase the bed temperature to 300℃ and adjust the (H₂S+COS)/SO₂ ratio to 2:1. The inlet temperature is normally controlled at 300℃ 5℃; however, it can be increased along with operating time in order to ensure the outlet gas does not contain SO₂ or COS.