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Miryan Cassanello

Bio: Miryan Cassanello is an academic researcher from Facultad de Ciencias Exactas y Naturales. The author has contributed to research in topics: Fluidized bed & Particle. The author has an hindex of 18, co-authored 62 publications receiving 1061 citations. Previous affiliations of Miryan Cassanello include University of Buenos Aires & National Scientific and Technical Research Council.


Papers
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Journal ArticleDOI
TL;DR: In this article, a kinetic characterization of CO 2 gasification of chars from Argentinean low-rank coals, subbituminous (SB) and high volatile bituminous, is performed by isothermal thermogravimetry.

172 citations

Journal ArticleDOI
TL;DR: In this paper, photo-Fenton mediated by ferrioxalate complexes was examined for the degradation of a synthetic cotton-textile dyeing wastewater, and the suitability of combining photo-fenton with conventional biological processes as a pre and/or post treatment was evaluated.

101 citations

Journal ArticleDOI
TL;DR: A phenomenological description and a semi-empirical two-zone model for the gas−liquid interfacial areas and the volumetric liquid-side mass-transfer coefficients in cocurrent downflow t... is proposed in this article.
Abstract: A phenomenological description and a semiempirical two-zone model are proposed for the gas−liquid interfacial areas and the volumetric liquid-side mass-transfer coefficients in cocurrent downflow t...

58 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental study of the solid phase dynamics in a three-phase fluidized bed reactor using heavy and light particles is carried out, where a radioactive particle tracking technique is employed to obtain extended time series of the tracer path.
Abstract: An experimental study of the solid phase dynamics in a three-phase fluidized bed reactor using heavy and light particles is carried out. A radioactive particle tracking technique is employed to obtain extended time series of the tracer path. The tracer has the same properties as the rest of the particles in the bed. A resealed range analysis is applied to time series of the fluctuating velocities to investigate the features of solid phase turbulence. It is found that turbulence is anisotropic. In the axial direction, the correlations between the fluctuating velocities are persistent in time, indicating a superdispersive axial dispersion of the solids. Hence a constant axial dispersion coefficient, which is traditionally used in these reactors to represent the solid phase turbulence, only constitutes a lumped parameter hardly extrapolable to different operating conditions, different systems, and different geometries. The tracer path is also analyzed according to the theory of deterministic chaos. It is found that the solids motion is chaotic. An increase in the gas flow rate increases the values of the parameters that quantify the chaotic behavior of the solids motion. This analysis is found to constitute a promising tool to determine flow regime transitions

57 citations

Journal ArticleDOI
TL;DR: In this article, a 3D gas-liquid-solid fluidized bed was studied using a noninvasive radioactive-particle tracking (RPT) technique using a multisite detection of γ radiations emitted from a single radiolabeled tracer particle.
Abstract: Local and macroscopic solids flow structure and kinematics in a 3-D gas–liquid–solid fluidized bed were studied using a noninvasive radioactive-particle tracking (RPT) technique. Based on the multisite detection of γ radiations emitted from a single radiolabeled tracer particle freely moving in the fluidized bed, RPT permitted to obtain fast sampling of 3-D trajectories of the tracer, whose physical properties were similar to those of the solids inventory. These trajectories showed the detailed motion sequences of the solid particles as entrained in the bubble wakes, fluctuating randomly or sinking deterministically in the liquid–solid emulsion. Based on measurements done in the vortical-spiral flow regime, the dynamic solids flow structure inside a three-phase fluidized bed can be viewed as a three-zone core–annulus–annulus structure: (1) a central fast-bubble flow region with the particles swirling upward; (2) a vortical flow region around the velocity inversion point with the particles momentarily captured in emulsion vortices; and (3) a relatively bubble-free descending flow region where the particles spiral down between the velocity inversion point and vessel walls. Our solids flow structure of dense fluidized beds are similar to the flow structure of liquid and/or solid in lean fluidized beds (observed through laser sheeting imaging). Measured distributions of local ensemble-averaged particle velocities and turbulence intensities were consistent with the existence of a toroidal recirculatory solids flow pattern in the bed. Measured mean circumferential ensemble-averaged radial velocity was essentially zero throughout most of the bed. The solids flow turbulence field was nonisotropic, as radial turbulence intensities were generally lower than longitudinal turbulence intensities.

54 citations


Cited by
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Journal ArticleDOI
TL;DR: The use of vegetable oils for making biodiesel due to its less polluting and renewable nature as against the conventional petroleum diesel fuel has been renewed interest in the use of biodiesel.

1,088 citations

Journal ArticleDOI
TL;DR: In this article, a review of the most relevant papers dealing with photo-Fenton processes at neutral pH is presented, where suitable criteria for choosing chelating agent and operating conditions are proposed.
Abstract: The occurrence of new emerging contaminants in surface waters has recently grabbed increased attention of the scientific community. The adoption of Advanced Oxidation Processes (AOPs) represents an efficient strategy to remove recalcitrant compounds from aqueous streams and achieve high mineralization levels. Amongst AOPs, the photo-Fenton process has been widely investigated due to the possibility of using a renewable energy source (i.e., solar energy) and low concentration of catalyst. On the other hand, the use of photo-Fenton process is restricted to acidic pH values, with associate high operating costs for industrial scale applications. To overcome these drawbacks, photo-Fenton processes modified by adding selected chelating agents can be successfully performed at neutral pH. The present review aims at examining and comparing the most relevant papers dealing with photo-Fenton processes at neutral pH that appeared in the literature so far. Such papers were classified by chelating species adopted. In particular, for each iron(III)-ligand complex, the mechanism of photolysis, the speciation diagram, the light absorption properties, the quantum yields, biodegradation and toxicity, and some example of applications are reported. As a conclusion, suitable criteria for choosing chelating agent and operating conditions in photo-Fenton processes at neutral pH are proposed.

581 citations

Journal ArticleDOI
01 Jan 2011-Energy
TL;DR: In this paper, a brief review of the coal gasification with CO2 as a diluent is presented, where coal rank, pressure, temperature, gas composition, catalyst and the minerals present inside the coal, heating rate, particle size, and diverse reactor types.

451 citations

01 Jan 2016
TL;DR: The elements of chemical reaction engineering is universally compatible with any devices to read as discussed by the authors and is available in our book collection and an online access to it is set as public so you can download it instantly.
Abstract: Thank you very much for reading elements of chemical reaction engineering. As you may know, people have search numerous times for their favorite books like this elements of chemical reaction engineering, but end up in malicious downloads. Rather than reading a good book with a cup of coffee in the afternoon, instead they juggled with some harmful bugs inside their desktop computer. elements of chemical reaction engineering is available in our book collection an online access to it is set as public so you can download it instantly. Our book servers saves in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the elements of chemical reaction engineering is universally compatible with any devices to read.

430 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of the process conditions such as heating rate, temperature and particle size on the product distribution, gas composition and char reactivity was studied in a free-fall reactor at pilot scale.
Abstract: This paper deals with rapid pyrolysis of agricultural residues such as olive waste and straw at high temperature (800 -1000degreesC) in a free-fall reactor at pilot scale. The conditions are of interest for gasification in fluidized beds where rapid pyrolysis plays an important role as first stage. The objective of the work is to study the effect of the process conditions such as heating rate, temperature and particle size on the product distribution, gas composition and char reactivity. A higher temperature and smaller particles increase the heating rate resulting in a decreased char yield. The cracking of the hydrocarbons with an increase in the hydrogen content is favoured by a higher temperature and by using smaller particles. Wood gives more volatiles and less char than straw and olive waste. The higher ash content in agricultural residues favours the charring reactions. The higher lignin content in olive waste results in a higher char yield in comparison with straw. Chars from olive waste and straw are more reactive in gasification than chars from birch because of the higher ash content.

377 citations