• Diesel hydrotreater feed introduction to Reactor is designed to be done at 180 to 200 DegC. Is there any issue, if feed introduction is done at 240degC or 260degC during Normal startup (Assuming HP Loop contains above Minimum prescribed H2S 2000 ppm). 



  • Jishnu Sivadasan, Chennai Petroleum Corporation Limited, jishnus@cpcl.co.in

    The Preheat exchanger may suffer from thermal shock and followed by leakage as one side of exchangers will cool down fast during the feed introduction whereas the liquid flow through the other side will be established after some time (since the feed has to pass the reactor). If your exchangers are designed for this higher gradient probablity of leaks are minimum.



  • Marcio Wagner da Silva, Petrobras, marciows@petrobras.com.br

    I believe that the main concern in this case is the higher probability of vaporization of the feed in the feed pump which can lead to cavitation of the pump and consequently led to a shutdown of the processing unit.