The hydrodynamic parameters were determined for two different three-phase systems (fluidized-bed and trickle-bed) through the experimental evaluation of the dynamic residence time distribution in the gas or liquid phase. For different fluid phase flow rates the fluidized-bed system was operated with a tracer in the gas phase and in the trickle-bed with a tracer in the liquid phase. The analysis...

This study was performed with a laboratory-scale fixed-bed bioreactor degrading a mixture of aromatic compounds (Solvesso100). The starter culture for the bioreactor was prepared in a fermentor with a wastewater sample of a care painting facility as the inoculum and Solvesso100 as the sole carbon source. The bacterial community dynamics in the fermentor and the bioreactor were examined by a con...

Over the years, hydrotreating process has been considerably improved in order to facilitate production of environmentally friendly diesel fuels by reducing sulphur and aromatics concentrations, as mandated contemporary emissions regulations. In this study, different kinetic models for hydrodearomatisation reaction influence rate on performance industrial trickle bed reactor gas oil light cycle ...

Black liquor is a side stream from the pulp and paper industry containing lignin other organic inorganic materials. Catalytic alkaline oxidation of black was carried out employing CuO/TiO2 catalyst in trickle-bed reactor mild reaction conditions (150–200 °C, 80 bar) short contact times (4–9 min). The effects temperature, time, presence were investigated. In our best operating conditions, i.e., ...

A trickle-bed reactor (TBR) when operated in a trickle flow regime reduces liquid resistance to mass transfer because a very thin liquid film is in contact with the gas phase and results in improved gas–liquid mass transfer compared to continuous stirred tank reactors (CSTRs). In the present study, continuous syngas fermentation was performed in a 1-L TBR for ethanol production by Clostridium r...