Your Position:Home>Products>Sulphuric Acid Catalyst>Sulphuric Acid Catalyst

Product Detail

    Sulphuric Acid Catalyst

    Sulphuric acid catalyst (also named vanadium pentoxide catalyst) suits for that sulphuric acid plants use the contact process to promote the oxidation of SO2 and O2 to give SO3.
    Based on more than 30 year’s experience with sulfuric acid catalyst, our factory can manufacture several types of catalysts in different shapes and sizes, such as S101, S101-2H, S101-3MH, S108, S108-2H, S108-3MH, etc. Our manufacturing technique is advanced. The carrier is treated by repulped stock processing, washed by hot concentrated acid, pretreatment of calcinations, and added several rare accessory ingredients, then molded by using advanced patent technology. The performance of our catalysts is excellent, with high activity, low ignition temperature, high mechanical strength, low losses of screening, and long life. As for star ring type of catalyst, it has advantage of large surface area, low pressure drop, and good resistance of dust accumulation.

    1. Broad Temperature Type of Sulfuric Acid Catalyst: S101.

    1).Type S101
    S101(Cylinder); S101-2H(Ring); S101-3MH(Star Ring). Type S101 series catalyst is a medium broad temperature vanadium pentoxide catalyst to promote the oxidation of SO2 and O2 to give SO3, which is developed independently in China. This catalyst has a manufacturing history of over 40 years with high standard quality and steady performance, has reached international advanced levels.
    This catalyst has advantages of wide applicability, broad range of temperature, high conversion and high mechanical strength. Ring or star ring shaped catalysts have solved some problems with cylinder shaped catalyst, which are small pellets, high pressure drop and high energy consumption, bad resistance of dust accumulation.

    2. Low Temperature Type Sulfuric Acid Catalyst: S108.

    Type S108
    S108(Cylinder); S108-H (Ring); S108-3MH (Star Ring)

    Type S108 Series sulfuric acid catalysts have advantages of low ignition temperature, high conversion, and lowering environmental pollution.

    3. The sulphuric acid catalyst operation manual

    1). Range of Application
    1). Sulphur iron ore making sulphuric acid
    2). Smelts smoke gas making sulphuric acid
    3). Sulphur burnt making sulphuric acid.

    2). Operating Requirements
    1). Type S101 series of broad temperature catalysts suit for every bed of converter.
    2). Type S108 series of low temperature catalysts suit for 1/3 top of the first bed to decrease inlet operating temperature, and 4th bed, 5th bed to improve equilibrium conversion and decrease gas emission.
    3). Install the catalyst beginning at the far side of the converter working back towards the manway. Use the marks on the converter wall as a guide for leveling the catalyst. Avoid walking directly on the catalyst. Use plywood sheets or boards laid on top of the catalyst if access is required across the top of the bed.
    4). New catalyst is easy to get damp, so it is better to choose fine days to sift it and load it .Time that catalyst is exposed in air should be as short as possible.
    5). Catalysts used in low temperature beds can be moved to high temperature beds, but contrarily it can’t be loaded. New catalysts should be loaded in the surface of each bed, and separated from used catalysts with stainless steel nets.
    6). It should inspect the pressure drop of each bed before repairing, and inspect the activity of catalysts in each bed before loading, so that supply some information for screening, loading or removing.

    3). Star-up and Shut down
    1). Heating up: Before start-up, heating up with dry air. The rate of heating is 20-30℃/h, but for new catalysts, the rate of heating should be controlled in 10-15℃/h before it reaches 150℃. In the plants using diesel oil for heating, the discontinuous heating method is recommended when the temperature is under 150℃, and make sure it burnt thoroughly in order to prevent the surface of catalysts extracting carbon. While heating, please control the moisture from blower, which should be not higher than 0.1g/Nm3.
    2). Gas injected: When inlet temperature of 1st bed reaches above 400℃, and inlet temperature of end bed is above 250℃, then the gas can be injected. Initial volume of gas flow is 1/3-1/2 of the total, and the gas concentration below 5% is ok. Then, make sure the exit temperature of 1st bed is not higher than 650℃, and increase the gas concentration and gas flow properly.
    3).Shut down:  For a short-time shut down, it should increase the inlet temperature of 1st bed(increasing 15℃), and close valve. However, for a heavy repair or long-time shut down, it should use dry air above 400℃ to replace the gas in the converter, till the content of SO3 in emission gas is less than 0.03%.

    4). Purifying index demanded of catalysts
    Water, acid mist, mine dust and the arsenical of content will make catalyst curdled and poisoned; it will affect the system resistance and Conversion ratio. The following indexes should be well controlled.
    Moisture ≤ 0.lg/Nm3            F ≤ 0.00lg/Nm3
    Acid mist ≤ 0.03lg/Nm3        As ≤ 0.00lg/Nm3
    Mine dust ≤ 0.005g/Nm3


    Specification of Type S108 Series and Type S101 Series