Abstract
The pitch conversion rate of the Cold Lake Vacuum Bottoms (CLVB) in the CANMET hydrocracking process with 1 wt % CANMET additive and a superficial recirculating hydrogen gas hourly space velocity of - 10 h-1 at room temperature and system pressure (13.9 MPa) has been modelled by the dispersion model. A universal rate constant equation and a correlation equation for the dispersion number as a function of liquid hourly space velocity have been obtained. Using these two empirical correlations, the pitch conversion of CLVB in the CANMET process at any operating condition of interest can be accurately predicted according to the first-order dispersion plug-flow performance equation given by Wehner and Wilhelm (17). The theoretical foundation and procedure for the model are described in detail. Also, suggestions for optimizing the effort to handle new feedstocks are given.
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