Canadian Journal of Chemical Engineering

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Simulation of fine particle formation by precipitation using computational fluid dynamics
Canadian Journal of Chemical Engineering - Tập 78 Số 5 - Trang 983-993 - 2000
Damien Piton, Rodney O. Fox, Bruno Marcant
AbstractThe 4‐environment generalized micromixing (4‐EGM) model is applied to describe turbulent mixing and precipitation of barium sulfate in a tubular reactor. The model is implemented in the commercial computational fluid dynamics (CFD) software Fluent. The CFD code is first used to solve for the hydrodynamic fields (velocity, turbulence kinetic energy, turbulen...... hiện toàn bộ
Orifice Flowmeter for Measuring Extensional Rheological Properties
Canadian Journal of Chemical Engineering - Tập 80 Số 6 - Trang 1189-1196 - 2002
Pierre J. Carreau, Gabriel Ascanio, Edmundo Brito‐de la Fuente, Philippe A. Tanguy
AbstractExtensional rheological properties play an important role in processes in which the fluid is subjected to highly decelerated or accelerated flows. This paper describes an orifice flowmeter used to measure extensional properties of rheologically complex fluids at high strain rates. The operating principle of the flowmeter is based on the pressure drop due to...... hiện toàn bộ
Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT
Canadian Journal of Chemical Engineering - Tập 97 Số 11 - Trang 2781-2791 - 2019
Raoof Bardestani, Gregory S. Patience, Serge Kaliaguine
AbstractGas physisorption is an experimental technique based on equilibrium Van der Waals interactions between gas molecules and solid particles, that quantifies the specific surface area (SSA), pore size distribution (PSD), and pore volume of solids and powders. The performance of catalysts, absorbents, chromatography column materials, and polymer resins depends o...... hiện toàn bộ
Experiments with concentrated slurries of particles with densities near that of the carrier fluid
Canadian Journal of Chemical Engineering - Tập 63 Số 6 - Trang 861-869 - 1985
C. A. Shook
AbstractExperimental investigations of headlosses and particle velocity distributions have been undertaken for water slurries of polystyrene particles of diameter d50 = 0.3 and 1.4 mm. At concentrations greater than 40–45% by volume, nearly linear headloss vs. velocity relationships were obtained. These suggested lami...... hiện toàn bộ
The relative exergy array—a new measure for interactions in process design and control
Canadian Journal of Chemical Engineering - Tập 89 Số 3 - Trang 545-549 - 2011
Juan M Montelongo-Luna, William Y. Svrcek, Brent R. Young
AbstractIn this paper, we present the relative exergy array (REA), a tool to measure the relative exergetic efficiency and the controllability of a process when a proposed process and control structure is postulated. The REA is a means to compare thermodynamic efficiency for control structures of multi input–multi output processes. Although only steady‐state inform...... hiện toàn bộ
Further studies on momentum dissipation of grid jets in a gas fluidized bed
Canadian Journal of Chemical Engineering - Tập 49 Số 5 - Trang 557-561 - 1971
Leo A. Behie, M.A. Bergougnou, C. G. J. Baker, T. E. Base
AbstractFour experimental aspects of momentum dissipation of grid jets in a gas fluidized bed of cracking catalyst are reported. First, an investigation was made into the radial distribution of axial momentum for air jets issuing from vertical long nozzles into a minimally fluidized bed. The theory of Abramovich was compared with these experimental results. Second,...... hiện toàn bộ
Numerical simulation process aspects of the novel static circulating jet mixer
Canadian Journal of Chemical Engineering - Tập 89 Số 3 - Trang 460-468 - 2011
Yanfang Yu, Jian Wu, Huibo Meng
AbstractA novel jet mixer was developed in virtue of static jet mixing and the static sealing technique. In this paper, the SST κ − ω model was chosen to simulate the flow field by analysing the flow pattern of multiple jets in the novel static circulating jet mixer (SCJM). The numerical predictions of mixing ti...... hiện toàn bộ
Kinetics of leaching of tunisian phosphate ore particles in dilute phosphoric acid solutions
Canadian Journal of Chemical Engineering - Tập 77 Số 1 - Trang 136-142 - 1999
F. Ben Brahim, Arbi Mgaidi, Mohamed Elmaaoui
AbstractVan der Sluis et al.'s model was used to determine the rate of the partial dissolution of a Tunisian phosphate rock with dilute phosphoric acid (1.5 mass% P2O5). When the temperature rises from 25 to 90°C, for a given particle size, the mass‐transfer coefficients, kL...... hiện toàn bộ
Modelling of a solid dissolution in liquid with chemical reaction: Application to the attack reaction of phosphate by sulphuric acid
Canadian Journal of Chemical Engineering - Tập 92 Số 10 - Trang 1829-1838 - 2014
Nader Frikha, Amira Hmercha, Slimane Gabsi
This paper aims at the determination of the kinetics and thermodynamics of a liquid–solid reaction: the attack reaction of the phosphate ore by sulphuric acid. This reaction, which is used industrially for the production of phosphoric acid, has two stages, the first of which consists in the dissolution of phosphate ore in the diluted phosphoric acid diluted and the ...... hiện toàn bộ
The thermal and transport characteristics of nanofluids in a novel three‐dimensional device
Canadian Journal of Chemical Engineering - Tập 92 Số 12 - Trang 2185-2201 - 2014
Jogender Singh, Neha Choudhary, K.D.P. Nigam
The augmentation in heat transfer can be achieved by improving either transport phenomena with geometry perturbation or thermal conductivity of the fluid itself. In the present study, the simultaneous effects of both the geometry and improved thermal conductivity have been tried on heat transfer enhancement by using two different nanofluids (Al2...... hiện toàn bộ
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