Fines deposition dynamics in gas–liquid trickle‐flow reactors

摘要: Nonfilterable fines, such as incipient coke particles or fines naturally occurring in oil sands bitumen, are known to be responsible for the severe plugging during flow of (fine) solid–liquid suspensions cocurrent gas–liquid trickle-bed hydrotreating reactors. Accumulating porous medium causes pressure buildup, and thus dropoff hydrogen partial bed, overutilizing recycling compressors shortening reactor operating cycles. In this work, a 1-D transient two-fluid hydrodynamic model based on macroscopic volume-average form multiphase system transport equations is developed, analyzed, validated experimentally. The hypothesizes that occurs via deep-bed filtration mechanisms. It incorporates physical effects porosity effective specific surface-area changes due capture inertial phases, coupling between filter rate equation interfacial momentum exchange force terms. tested trickle-flow regime conditions mimicking process with spherical trilobe catalysts. To rationalize phenomena reactors, parametric studies carried out liquid velocity viscosity, gas density velocity, feed concentration, dynamics.