Challenges for the periodic operation of trickle-bed catalytic reactors

Carbon materials and catalytic wet air oxidation of organic pollutants in wastewater

“…Forced periodic operation of liquid flow must be considered as a new promising operation concept. Silveston and Hanika [199] lately reviewed periodic operation of TBRs pointing out the good results obtained for reactions including the wet oxidation of SO 2 over activated carbon [200] and the catalytic hydrogenation of a-methylstyrene [201,202] or crotonaldehyde [203]. Essentially, periodic operation consists in controlled ON-OFF liquid feed flow modulation to induce forced pulsing flow regime in the reactor.…”

Computational Flow Modelling of Multiphase Reacting Flow in Trickle-bed Reactors with Applications to the Catalytic Abatement of Liquid Pollutants

“…Multiphase reactors such as TBRs have been commonly designed and operated under steady-state mode in the industrial applications. However, novel operating modes under transient conditions has generated an emergent interest in view of the significant performance enhancement encompassing chemical conversion and products selectivity (Dudukovic et al, 1999;Boelhouwer et al, 2002;Silveston & Hanika, 2002. The transient operation of TBR revealed key characteristics reinforced by the dynamic nature of gas-liquid flow over the catalyst packing, which ultimately leads to the cumbersome nonlinearity behaviour of trickle beds (Khadilkar et al, 2005).…”

Optimal Design of a Multifunctional Reactor for Catalytic Oxidation of Glucose with Fast Catalyst Deactivation

“…Modulation of mostly composition and/or feed flow rate was researched by e.g. : Boelhouwer, et al (2002), Silveston & Hanika (2002), Tukač, et al (2003), Silveston & Hanika (2004), Liu, et al (2008 etc., with the aim to improve chemical reactors performance through forcing the reactor to operate under transient rather than steady-state conditions. Silveston (1998) in his monograph pays attention to several catalytic processes operated in this way.…”