Kraus Sulfur Catalysis Activated alumina application

  Claus's sulfur recovery process is widely used in the processing of coal, petroleum, and natural gas such as synthetic ammonia and methanol feed gas production, refinery gas processing, and natural gas purification. Sulfur is recovered from the H₂S-containing gas produced in the desulfurization process.

  The purity of the sulfur recovered by the Claus process can reach 99.8%, which can be used as a sulfur resource for the production of sulfuric acid and as a chemical raw material for other sectors. The essence of the Claus process to recover sulfur is a partial oxidation-reduction reaction. The main chemical reaction formula of the Claus process is:

H₂S +3/202 =SO₂ + H₂O + Q
2H₂S + S0₂=3/XSx + 2H₂0+ Q
H₂S +CO₂ =COS+ H₂O+ Q
2H₂S +CO₂ =CS₂+ H₂O+ Q

  The sulfur recovery process using Claus reaction principle is mainly divided into two stages: the high temperature zone stage and the low temperature zone stage. The high temperature area (above 800°C) is carried out in the Claus combustion furnace, and a large number of side reactions also occur to form COS and CS2. But the conversion rate is not more than 70%; the catalytic reaction occurs in the low temperature area (below 400°C), mainly on the catalyst bed in the converter, and the hydrolysis reaction of organic sulfur occurs at the same time. Generally after high temperature reaction and two-stage catalytic reaction. The activated alumina is exactly the catalyst used in the low-temperature zone.

  The Claus process recovery sulfur catalyst initially used bauxite catalyst. With the improvement of process conditions and development, activated alumina was used to replace bauxite. At present, there are mainly iron-containing titanium-containing active alumina catalysts with activated alumina as the carrier. Activated alumina catalyst is a kind of sulfur recovery catalyst with good performance. It has good initial activity and also has certain hydrolysis performance.

  The technical requirements of activated alumina used are different according to the specific equipment parameters, and the corresponding activated alumina catalyst can be prepared and prepared according to different processes.