Catalytic reactor engineering ⇒ information-driven design of packed (operando), fluidized, multi-functional, and -phase reactors

Problem statement

At lab-scale, the ultimate goal of a catalytic reactor is to provide (1) reliable kinetic information, neglecting or controlling other phenomena (heat-mass transfer and hydrodynamics); (2) high-throughput data to amplify the results, accelerate model and catalyst discoveries; and (3) results with the minimum requirements of reactants and wastes generated. The pillars of these reactors are quality, quantity, and safety.

We design, build and test different laboratory-scale reactors. Our strategy involves creating and testing reactor prototypes while modeling these using our workflow. We have high-speed cameras, probes, and other measuring instruments to understand the reactor behavior. We focus on packed-, fluidized-bed, and multiphase reactors:

In packed bed reactors, we focus on forced dynamic and operando reactors. These are the quintessence of information-driven reactors where the dynamics can involve flow changes, temperature, pressure, partial pressure, presence of activity modifiers (poissons, H2O…). In operando reactors, we follow a spectro-kinetic-deactivation-hydrodynamic approach to resolve the individual steps involved. In fluidized bed reactors, we focus on downers and multifunctional reactors (circulating, multizone or two-zone, Berty reactors) We focus on trickle-bed, slurry, and bio-electrochemical reactors in multiphase bed reactors.

Al pilot-plant scale, we aim to reach the maximum productivity levels while solving the growing pains: the scale-up. Based on a robust kinetic model obtained in the intrinsic kinetic reactor (lab-scale) and using computational fluid dynamics, we design, build, and operate pilot plants. At this stage, we seek partnerships with investment or industrial enterprises to make these pilot plants.

Goals

  • Multifunctional fluidized bed reactors ⇒ multizone, circulating...
  • Packed bed membrane reactors
  • Forced dynamic reactors ⇒ pulsing, SSITKA...
  • Forced dynamic operando reactors ⇒ DRIFTS, TPSR...
  • Operando reactors
  • Spray fluidized bed reactors
  • Downer reactor I ⇒ micro downer
  • Downer reactor II ⇒ counter-current and scale-up
  • Batch Berty reactor ⇒ short contact time
  • Multiphase reactors ⇒ trickle bed and slurry
  • High throughput experimentation (HTE) reactors
  • Photo-thermal and bioreactors
  • Reactor visualization and prototyping lab
  • Spatio-temporal hydrodynamic characterization and validation

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Sustainable Energy Production from Domestic Wastewater via Bioelectrochemical Reactors Using MXene Efficient Electrodes Decorated with Transition Metal Nanoparticles

by Kolubah, Hedhili, Hassine, Díaz-Rúa, Drautz-Moses, Obaid, Ghaffour, Saikaly, Mohamed, Castaño
J. Environ. Chem. Eng. Year: 2024 DOI: https://doi.org/10.1016/j.jece.2024.113793

Abstract

This study investigates the role of iron oxide (Fe2O3)-MXene (Ti3C2) based anode on microbial growth to generate clean energy from wastewater using a mediator less MFCs. We combine physical, chemical, and biological methods (microbe metabarcoding) to elucidate the engineered anode structure and the impact of Fe2O3 /Mxene on the growth of microbes, the electron transfer process, and generated power. The results demonstrate that Fe2O3 in the engineered anode facilitates the microbes-anode interaction that improves the attachment of a biofilm predominantly consisting of Acidomonas methanolica(75 % of read counts), which engages in extracellular electron transfer by leveraging the Fe redox cycle during MFC operations, achieving a power density of 2.7 W m–2 and a notable current density of 15 A m–2. The results open perspectives for understanding the role of transition metal oxide in the rational design of anodes targeting specific microbe populations for the practical application of MFCs.

Keywords

EPB CRE