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  1. Kresimir

    SRU hidrogenation reactor temperatue

    What is the optimum inlet temperature for the TGTU hydrogenation reactor (CoMo catalyst), to ensure maximum conversion of S, SO2, COS CS2 into H2S?
  2. Kresimir

    Water in desulphurised LGO product

    We have been encountering problems with excessive water content of desulphurised LGO product from an HDS unit. After feed switch or after start of LCO addition to the LGO feed, we would experience formation of an emulsion in the HDS unit product. Attempting to resolve this problem by changing...
  3. Kresimir

    Crude unit corosion

    What is the effect of phenole in corosion regime on crude tower overhead condenser? HCl is also present in aqueous phase (liquid).
  4. Kresimir

    Suspected tube leakage in Hydrotreater exchanger train

    We found evidence of hydrotreater feed mixing with the reactor effluent. The analisys showed that we have a leak in our feed/effluent exchanger train. Is there a way to take reactor effluent samples during normal plant operation, between heat exchangers? There are 6 exchangers in total. We don't...
  5. Kresimir

    MDEA Foaming

    It seems that foaming alwas has more than one cause. I found that good filtration is crucial to decrease foaming tendency in MDEA systems, especially if you have a lot of solid particles in the system. If corrosion in the amine system is high, iron containing particles may cause foaming, as well...
  6. Kresimir

    Air cooler fouling and cleaning methods

    A forgot to mention that my plant has continuous reactor effluent water washing, before the air cooler. However, due to the facts that the air cooler has 4 banks, and its piping is simetrically balanced; also that it is running at around 40 % design flow; and that the water injection is in one...
  7. Kresimir

    Air cooler fouling and cleaning methods

    What would be the best way to do a chemical cleaning of HDS plant reactor effluent air cooler (before the high pressure separator) that is fouled with anorganic salts (bisulphides and chlorides) and maybe some solidified heavy (vacuum) gas oil? Shoud I use water, or water and some chemical agent?

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