The paper presents a simplified model of chemical looping combustion in a fixed bed reactor under isothermal condition. Both reduction and regeneration phases of the oxygen carrier are modeled in the single reactor model under the hypothesis of discontinuous feed and simplified reaction kinetics. This model is meant to be the simplest possible formulation for a description that incorporates all...

The treatment of perchlorate-contaminated groundwater was examined using two side-by-side pilot-scale fixed-bed bioreactors packed with sand or plastic media, and bioaugmented with the perchlorate-degrading bacterium Dechlorosoma sp. KJ. Groundwater containing perchlorate (77microg/L), nitrate (4mg-NO(3)/L), and dissolved oxygen (7.5mg/L) was amended with a carbon source (acetic acid) and nutri...

• Parallel fixed bed reactor system designed for direct air capture by adsorption. Solid basis process optimization is achieved through dynamic modelling. High desorption temperature always desired according to sensitivity analyses. Weather conditions highly affect performance. The extraction of CO 2 directly from the atmosphere (Direct Air Capture) commonly employed using supported-amine sorbe...