Studies on absorption of carbon dioxide in the rotating packed bed (RPB) were performed with two different types metal foam packing, and liquid absorbents: 30 wt.% solutions N-methyldiethanolamine water, without addition 0.2 carbonic anhydrase. Different rotation speeds, gas flow rates investigated. Results evaluated using normalized interphase molar flow. Increased speeds phase positively affected mole CO2, but high limited operating window due to flooding. The anhydrase significantly...

The paper presents the development of a model for ozone treatment in dynamic bed different microorganisms (

The behavior of continuous and discrete phases in countercurrent spray drying process is described the article. Literature our own experimental results on system are presented mechanism moisture evaporation hydrodynamics phase discussed. Negative values particle velocity were found chamber, which confirmed existence recirculation zones where agglomeration particles took place. An increase mean size with distance from nozzle caused by column was also observed. High sensitivity discrete-phase...

A kinetic model of carbon dioxide absorption within an internal a rotating packed bed (RPB) apparatus was developed using experimental data. Kinetics the chemical reaction between and aqueous solution N-methyldiethanolamine with without carbonic anhydrase additive were determined in flat phase contact surface batch stirred reactor implemented into model. Overall pressure drop efficiency metal foam modeled compared measurements. The model's predictions CO2 fit mostly 20% error range....

Abstract The article presents a full set of spray drying experiments for selected products performed in co-current tower developed at Lodz Technical University. enabled identification process and atomization parameters (feed properties, feed rate temperature, agent air flow rate, ratio, etc.) on degradation kinetics, structure, particle residence time, final product properties. Drying temperature measurements showed, all cases, the initial increase gas envelope caused by expansion then...

Carbon dioxide is considered the most important contributor to global warming effect. To reduce greenhouse gas emissions, CO2 should be separated from exhaust stream in a selective way. The often applied technology capture gases reactive absorption aqueous amine solutions, which currently widely used different industrial applications. efficiency of this could improved by applying high-gravity technologies that intensify mass transfer and can enable substantial equipment size reduction...

The work presents the comparison of two spray drying techniques: conventional concurrent and novel technique; that is, flame (FSD) in terms energy consumption quality final product. amount consumed to dry maltodextrin solutions showed for similar moisture evaporation rate equivalent operating parameters process, was 5 30% lower FSD process. produced bulk apparent densities powder and, due shorter time, content fractured particles with classical

Results of the experiments on drying skin-forming material sprayed with two nozzles in counter-current pilot spray dryer are presented article. Phase Doppler Anemometry (PDA) measurements were conducted above, between, and below spraying upward downward which allowed us to track changes particle size distribution (PSD) velocities tower for different nozzle configurations. The analysis PSD shows that pointing downwards, zone was observed under lower whereas agglomeration develops between...

A rapid prototyping method was developed for quick and inexpensive design of various geometrical solutions rotating packed bed internals. Sixteen geometries were designed with the use 3D modeling software subsequently 3D-printed, if possible. The printed packings tested dry pressure drop to reject ones generating too high air flow resistance. Eventually, wet effective mass transfer area generated in specified conditions. An evaluation compare results from different determine geometry most...

The paper presents an experimental analysis of the spray drying conditions on product properties in a pilot plant counter-current dryer with swirling air flow. influence slurry – atomizing ratio, flow rate and swirl number efficiency process was examined. increase ratio promotes agglomeration, ultimately leading to development wet, coarse granules. Through experimentation, slurry-to-atomizing-air can be optimized maximize capacity (i.e. acceptable vs. total dried powder) energy whilst...

The article presents the results of experimental and theoretical study on mechanism, quality interactions phase hydrodynamics in flame spray drying (FSD) process. impact FSD parameters temperature patterns, particle size distribution, residence time, color index, caramelization product have been determined. For time shorter than flame, index final was 84.9 5-hydroxymethylfurfural (HMF) content 228.3 mg/kg, whereas when (0.03 s) (1 s), lower values (18.7), HMF (116.2 mg/kg) were obtained product.

Abstract The main aim of the study presented in this article was to develop and test a method determine spray-drying kinetics laboratory scale. A special measuring tunnel obtain evaporation rate similar conditions observed column designed, built tested. Extensive studies drying for maltodextrin were performed different air flow rates temperatures. Test runs repeatability technique showed satisfactory agreement between subsequent measurements, which confirms accuracy developed method. An...

This article presents results of preliminary studies on a novel spray drying method; i.e., with simultaneous ignition sprayed medium, termed Flame Spray Drying (FSD). Preliminary FSD trials were carried out to determine the concentration flammable component at which flame could be initiated and combustion process sustained for two materials different thermal sensitivity (i.e., maltodextrin ceramic powder) components: ethyl alcohol sunflower oil. The analysis temperature distributions in...

The work presents the fundamental research of dispersed phase flow during flame spray drying. Particle dynamics analysis and laser Doppler anemometry technique were applied to determine particle size distribution velocity distribution. Results study showed that stable combustion longer length observed for coarse (large droplets, low atomization pressure, small spraying angle, concentration droplets in spray). residence time zone is main factor affecting increase diameters due puffing....

A method for pressure drop prediction using Computational fluid dynamics (CFD) was designed and validated experimentally with a set of baffle-based geometry types Rotating Packed Bed's packings. The methodology served as foundation CFD optimisation tool internal based on minimal drop. baffles in the were characterized by five parameters: bottom top rounding, external baffle inclination angle. Based variables, 78 different created subjected to tool. optimal manufactured, simulation results...

A method for pressure drop prediction using Computational fluid dynamics (CFD) was designed and validated experimentally with a set of baffle-based geometry types Rotating Packed Bed’s packings. The methodology served as foundation CFD optimisation tool internal based on minimal drop. baffles in the were characterized by five parameters: bottom top rounding, external baffle inclination angle. Based variables, 78 different created subjected to tool. optimal manufactured, simulation results...