Particle Velocity, Solids Hold-Up, and Solids Flux Distributions in Conical Spouted Beds Operating with Heavy Particles

Date

2016-03-23

Author

Külah, Görkem
KÖKSAL, MURAT

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

282
views

0
downloads

Conical spouted beds operating with high density particles have recently gained attention because of their potential use as nuclear fuel coaters for next-generation nuclear reactors. To design, scale-up, and manufacture these coaters, detailed investigation of local flow structure is of paramount importance. Therefore, in this study, local instantaneous particle velocity and solids hold-up and flux measurements were carried out in spouted beds having a wide range of cone angles (30, 45, 60) using zirconia particles (d(p) = 0.5, 1 mm; rho(p) = 6050 kg/m(3)). Effects of axial height, particle diameter, conical angle, and static bed height on local flow behavior were investigated. Comparisons were also made with the results of low-density particle studies. It is shown that particle velocity decreases and solids hold-up and flux increase along the bed height in the spout. The solids circulation is augmented as particle diameter and conical angle are decreased and static bed height is increased.

Subject Keywords

Industrial and Manufacturing Engineering, General Chemistry, General Chemical Engineering

URI

https://hdl.handle.net/11511/38445

Journal

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

DOI

https://doi.org/10.1021/acs.iecr.5b04496

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Mn-Cu and Mn-Cu-V mixed-oxide regenerable sorbents for hot gas desulfurization Karayilan, D; Doğu, Timur; Yasyerli, S; Dogu, G (American Chemical Society (ACS), 2005-07-06) Porous Mn-Cu and Mn-Cu-V mixed-oxide sorbents prepared by the complexation technique were tested for high-temperature removal of H2S in the presence of hydrogen gas. Sorption experiments carried out at 627 T in a fixed-bed reactor showed higher reactivity and also higher sulfur retention capacity (over 0.15 g of S/g of sorbent) for the Mn-Cu mixed oxide than for the Mn-Cu-V mixed oxide. Successive sulfidation-regeneration cycles demonstrated that the MnCu mixed oxide was also more stable than Mn-Cu-V, maint...
Energy efficiency of machining operations: A review Moradnazhad, Mariyeh; ÜNVER, HAKKI ÖZGÜR (SAGE Publications, 2017-09-01) Manufacturing processes are among the most energy intensive on earth. As negative ecological and economic impacts increase, reducing energy consumption is becoming critically important. In this article, a comprehensive overview of energy-saving strategies and opportunities for increasing energy efficiency in manufacturing operations is presented, with a focus on metal cutting processes. The issues and approaches involved in energy efficiency of machine tools and machining operations are reported in the lite...
Development of ceria and tungsten promoted nickel/alumina catalysts for steam reforming of diesel Bozdag, A. Arslan; Kaynar, A. D. Deniz; Doğu, Timur; Sezgi, Naime Aslı (Elsevier BV, 2019-12-01) Use of diesel fuel for on-board hydrogen production for auxiliary power units (APUs) through diesel steam reforming (DSR) reaction is a promising route. Coke minimization for cheap and active Ni/Al2O3 catalyst is necessary for long term operation in DSR reaction. Coke minimization with high hydrogen productivity can be accomplished through the optimization of operating conditions and promoting the Ni/Al2O3 catalyst with ceria (CeO2) and tungsten (W) which attracts attention with their coke resistive propert...
Development of organic-inorganic composite membranes for fuel cell applications Erdener, Hülya; Baç, Nurcan; Department of Chemical Engineering (2007) Hydrogen is considered to be the most promising energy carrier of the 21st century due to its high energy density and sustainability. The chemical energy of hydrogen can be directly converted into electricity by means of electrochemical devices called fuel cells. Proton exchange membrane fuel cells (PEMFC) are the most preferred type of fuel cells due to their low operating temperatures enabling fast and easy start-ups and quick responses to load changes. One of the most important components of a PEMFC is t...
Mathematical modeling of thermal decomposition of coal Guruz, GA; Uctepe, U; Durusoy, T (Elsevier BV, 2004-06-01) Pyrolysis, as a first step in all thermochemical coal conversion processes, has been investigated in detail over the years in order to evaluate the kinetic data and to establish reliable models for the complex reaction scheme. Since coal pyrolysis is not a single reaction but rather a multiplicity in different time intervals for isothermal pyrolysis, or in different time and temperature intervals for the case of heat-up, any set of parameters cannot be expected to represent data accurately over a wide range...

Citation Formats

G. Külah and M. KÖKSAL, “Particle Velocity, Solids Hold-Up, and Solids Flux Distributions in Conical Spouted Beds Operating with Heavy Particles,” INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, pp. 3131–3138, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38445.