Pressure drop and liquid holdup in high pressure trickle-bed reactors

摘要: The vast majority of commercial trickle-bed reactors, fixed bed catalyst particles contacted by cocurrent downflow gas and liquid, operate at high pressure. In this study Holubet al.'s (1992, 1993) phenomenological model has been extended to describe the effect pressure (i.e. increased density) on drop liquid holdup in trickle flow regime. This model, based annular two-phase a slit, ties but was previously verified only atmospheric advantage is that Ergun constantsE1 andE2, required are determined from single phase (gas) through packing interest no data needed. Experiments were conducted over range velocities different characteristics. developed analysis, describing rate terms five limiting cases, matches well experimental observations. collected used as basis for comparing prediction available correlations. (1992) observations better than It also predicts all trends correctly changes operating variables such pressure, superficial mass velocity with physical properties liquid.