Enhancement of CO2 Removal Efficacy of Fluidized Bed Using Particle Mixing

Abstract

The present study proposes a cost-effective assisted fluidization technique of particle mixing to improve the carbon capture effectiveness of a fluidized bed containing fine adsorbent powder. Using activated carbon as the adsorbent, we mixed external particle of Geldart group B classification in different fractions to examine the effectiveness of the proposed strategy of particle mixing. Four different particle-mixing cases were considered by varying the amount of added particle—0, 5, 10, and 30 wt %—on external particle-free basis. The inlet flow of the nitrogen was fixed, while two different flows of carbon dioxide were used. The adsorption experiment consisted of a three step procedure comprising purging using pure nitrogen, followed by adsorption with fixed inlet CO2 concentration, and finally the desorption step. Inlet flows of both nitrogen and CO2 were separately controlled using electronic mass flow controllers with the help of data acquisition system (DAQ). The CO2 breakthrough was carefully monitored using the CO2/O2 analyzer, whose analog output was recorded using the DAQ. Best results were obtained with 10% external particles. This is in conformity with the results of our previous study of bed hydrodynamics, which pointed to clear improvement in the fluidization behavior with particle mixing.

Synthesis and Use of Valsartan Metal Complexes as Media for Carbon Dioxide Storage

“…Materials used to adsorb CO 2 should have an excellent adsorption capacity and the ability to be regenerated and reused several times without losing their efficiency [19]. Zeolites, silica, and activated carbon-containing materials have been tested as storage media for CO 2 [20][21][22][23][24]. However, little success has been achieved with these materials, either because they are strongly hydrophilic, as in zeolites, or they have poor gas selectivity, as in activated carbons [25,26].…”

Porous Aromatic Melamine Schiff Bases as Highly Efficient Media for Carbon Dioxide Storage

“…The adsorption capacity of calcium oxide is limited but sufficiently high to facilitate its use as an effective medium for CO 2 capture. Several other materials such as ionic liquids in a solid matrix [27], zeolites [28], silica [29], and those containing activated carbons [30][31][32] have been evaluated as CO 2 sorbents. Some of these materials possess unique thermal properties, high chemical stability, high surface area, tunable chemical structures, recyclability, and reusability.…”

Dynamics of partially collapsing pulsed fluidized bed

“…These techniques mainly employ strategies to mitigate the effect of IPFs. [ 6,10–25 ] For example, mechanical vibrations have been utilized to improve the fluidization behaviour and suppress segregation phenomenon along the bed height, [ 20,25 ] leading to better quality products. [ 26 ] Barletta et al [ 21 ] studied the effect of frequency and acceleration on the fluidization behaviour of FCC powder by monitoring the pressure drop and the bed height.…”