Currently the increasing haze weather in China has attracted high attention on environmental pollution. To control environmental pollution, it is necessary to control the emission of pollutants from motor vehicles. The key is to reduce the content of sulfur and make the desulfurization. At present, more than 95% of refineries in the world use molybdenum-based?catalysts for desulfurization, which has the characteristic of high direct desulfurization activity and low hydrogen consumption. The common catalysts are cobalt-molybdenum catalysts and nickel-molybdenum catalysts.
The shape of molybdenum-based?catalyst is flake or small ball with the size of 1.2~2.5mm, the color is dark blue, the density is 0.86~1.0g/cm3. It has high activity, good stability, high strength, long life and good sulfur resistance. The producer does not need to spend a lot of money to make deep desulfurization process, so the catalyst will have good economic prospects.
The production method of the catalyst is as follows:
1.0 First puts the required materials including active aluminum oxide powder, deionized water, nitric acid and extruding aid into the kneading machine, fully kneads them, and then extrudes them into the extruding machine.
2.0 Dry and calcine the above mentioned molding materials, the strip shaped alumina carrier is prepared.
3.0 Add cocatalyst, start to prepare Co Mo or Ni Mo aqueous solution according to the formula, and then impregnate or spray the added strip alumina.
4.0 Drain, dry and clacine the product mentioned in 3.0, and then Co Mo hydrodesulfurization catalyst is prepared.
The catalyst is widely used and has various types, which plays an?important role in the field. It is quite suitable for petrochemical and chemical industries. It is often used in petroleum hydrorefining, hydrodenitrogenation or the preparation of acrylic acid and crotonic acid. The?catalyst is used in low-carbon industry and falls in green technology. The catalyst market in developing countries such as China will grow rapidly in future and occupy the main position in the catalyst market.
