Characteristics of Ebullated-Bed Reactor

The capability of the daily addition of a small quantity of catalyst is a key feature of the EBR and results in constant product quality over time. The run length for the EBR system is therefore not a function of catalyst activity, as in a fixed-bed system, but depends on the good control of sediment formation, which is commonly limited at 0.8-1.0wt% (Kressmann et al., 1998 Ancheyta and Speight, 2007). 

FIGURE10.1 Ebullated-bed reactors for hydrocracking, (a) H-Oil reactor and (b) LC-Fining reactor. (Adapted from Ancheyta, J. and Speight, J.G., Hydroprocessing of Heavy Oils and Residua, CRC Press, Taylor Francis Group, Boca Raton, FL, 2007.) 

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