scholarly journals Functionalization of polymers using an atmospheric plasma jet in a fluidized bed reactor and the impact on SLM-processes

2014 ◽  
Author(s):  
M. Sachs ◽  
A. Schmitt ◽  
J. Schmidt ◽  
W. Peukert ◽  
K-E Wirth
Keyword(s):  
Fluidized Bed ◽  
Plasma Jet ◽  
Fluidized Bed Reactor ◽  
Atmospheric Plasma ◽  
Functionalization Of Polymers ◽  
The Impact

Treatment of polymer powders by combining an atmospheric plasma jet and a fluidized bed reactor

2018 ◽  
Vol 325 ◽  
pp. 490-497 ◽  
Author(s):  
Marius Sachs ◽  
Jochen Schmidt ◽  
Wolfgang Peukert ◽  
Karl-Ernst Wirth
Keyword(s):  
Fluidized Bed ◽  
Plasma Jet ◽  
Fluidized Bed Reactor ◽  
Atmospheric Plasma ◽  
Polymer Powders

Functionalization of polymer powders for SLS-processes using an atmospheric plasma jet in a fluidized bed reactor

2015 ◽  
Author(s):  
Marius Sachs ◽  
Adeliene Schmitt ◽  
Jochen Schmidt ◽  
Wolfgang Peukert ◽  
Karl-Ernst Wirth
Keyword(s):  
Fluidized Bed ◽  
Plasma Jet ◽  
Fluidized Bed Reactor ◽  
Atmospheric Plasma ◽  
Polymer Powders

scholarly journals Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater

2021 ◽  
Vol 12 ◽  
Author(s):  
Yeray Asensio ◽  
María Llorente ◽  
Alejandro Sánchez-Gómez ◽  
Carlos Manchon ◽  
Karina Boltes ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Vibrio Fischeri ◽  
Fluidized Bed Reactor ◽  
Classical Solutions ◽  
Cyclic Voltammograms ◽  
Toc Removal ◽  
Pharmaceutical Pollutants ◽  
Promising Solution ◽  
Wastewater Pollutants ◽  
The Impact

The capacity of electroactive bacteria to exchange electrons with electroconductive materials has been explored during the last two decades as part of a new field called electromicrobiology. Such microbial metabolism has been validated to enhance the bioremediation of wastewater pollutants. In contrast with standard materials like rods, plates, or felts made of graphite, we have explored the use of an alternative strategy using a fluid-like electrode as part of a microbial electrochemical fluidized bed reactor (ME-FBR). After verifying the low adsorption capacity of the pharmaceutical pollutants on the fluid-bed electrode [7.92 ± 0.05% carbamazepine (CBZ) and 9.42 ± 0.09% sulfamethoxazole (SMX)], our system showed a remarkable capacity to outperform classical solutions for removing pollutants (more than 80%) from the pharmaceutical industry like CBZ and SMX. Moreover, the ME-FBR performance revealed the impact of selecting an anode potential by efficiently removing both pollutants at + 200 mV. The high TOC removal efficiency also demonstrated that electrostimulation of electroactive bacteria in ME-FBR could overcome the expected microbial inhibition due to the presence of CBZ and SMX. Cyclic voltammograms revealed the successful electron transfer between microbial biofilm and the fluid-like electrode bed throughout the polarization tests. Finally, Vibrio fischeri-based ecotoxicity showed a 70% reduction after treating wastewater with a fluid-like anode (+ 400 mV), revealing the promising performance of this bioelectrochemical approach.

scholarly journals CFD-DEM Simulation of Biomass Pyrolysis in Fluidized-Bed Reactor with a Multistep Kinetic Scheme

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5358
Author(s):  
Tao Chen ◽  
Xiaoke Ku ◽  
Jianzhong Lin ◽  
Henrik Ström
Keyword(s):  
Particle Size ◽  
Fluidized Bed ◽  
Pyrolysis Temperature ◽  
Pyrolysis Product ◽  
Kinetic Scheme ◽  
Fluidized Bed Reactor ◽  
Char Yield ◽  
Thermochemical Conversion ◽  
Lagrangian Description ◽  
The Impact

The pyrolysis of biomass in a fluidized-bed reactor is studied by a combination of a CFD-DEM algorithm and a multistep kinetic scheme, where fluid dynamics, heat and mass transfer, particle collisions, and the detailed thermochemical conversion of biomass are all resolved. The integrated method is validated by experimental results available in literature and a considerable improvement in predicting the pyrolysis product yields is obtained as compared to previous works using a two-fluid model, especially the relative error in the predicted tar yield is reduced by more than 50%. Furthermore, the evolution of light gas, char and tar, as well as the particle conversion, which cannot easily be measured in experiments, are also revealed. Based on the proposed model, the influences of pyrolysis temperature and biomass particle size on the pyrolysis behavior in a fluidized-bed reactor are comprehensively studied. Numerical results show that the new algorithm clearly captures the dependence of char yield on pyrolysis temperature and the influence of heating rate on light gas and tar yields, which is not possible in simulations based on a simplified global pyrolysis model. It is found that, as the temperature rises from 500 to 700 °C, the light gas yield increases from 17% to 25% and char yield decreases from 22% to 14%. In addition, within the tested range of particle sizes (<1 mm), the impact on pyrolysis products from particle size is relatively small compared with that of the operating temperature. The simulations demonstrate the ability of a combined Lagrangian description of biomass particles and a multistep kinetic scheme to improve the prediction accuracy of fluidized-bed pyrolysis.

Surface modification of particles in a plasma jet fluidized bed reactor

1997 ◽  
Vol 88 (1-3) ◽  
pp. 226-231 ◽  
Author(s):  
Takanobu Hanabusa ◽  
Shigeyuki Uemiya ◽  
Toshinori Kojima
Keyword(s):  
Surface Modification ◽  
Fluidized Bed ◽  
Plasma Jet ◽  
Fluidized Bed Reactor

Removal of microcystin-LR from drinking water with TiO2-coated activated carbon

2004 ◽  
Vol 4 (5-6) ◽  
pp. 21-28
Author(s):  
S.-C. Kim ◽  
D.-K. Lee
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Synergistic Effect ◽  
Fluidized Bed ◽  
Continuous Flow ◽  
High Surface ◽  
High Surface Area ◽  
Fluidized Bed Reactor ◽  
Exterior Surface ◽  
Tio2 Particles

TiO2-coated granular activated carbon was employed for the removal of toxic microcystin-LR from water. High surface area of the activated carbon provided sites for the adsorption of microcystin-LR, and the adsorbed microcystin-LR migrated continuously onto the surface of TiO2 particles which located mainly at the exterior surface in the vicinity of the entrances of the macropores of the activated carbon. The migrated microcystin-LR was finally degraded into nontoxic products and CO2 very quickly. These combined roles of the activated carbon and TiO2 showed a synergistic effect on the efficient degradation of toxic microcystin-LR. A continuous flow fluidized bed reactor with the TiO2-coated activated carbon could successfully be employed for the efficient photocatalytic of microcystin-LR.

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