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Showing papers in "Chemical Engineering Science in 2001"


Journal ArticleDOI
TL;DR: In this paper, the role of reaction engineering in the development of micro reaction technology is described along with new approaches to scale up based upon replication of microchemical devices and the benefits of integrating sensors for flow, temperature, and chemical composition with microfluidic reaction and control components.

1,079 citations


Journal ArticleDOI
TL;DR: In this paper, a design of a boiler with chemical-looping combustion is proposed, which involves two interconnected fluidized beds, a high-velocity riser and a lowvelocity bed.

940 citations


Journal ArticleDOI
TL;DR: In this article, a review of recent progress in research of crystallization processes of fats and lipids is reviewed with an emphasis on kinetic properties of polymorphic crystallization in pure and mixed systems.

535 citations


Journal ArticleDOI
TL;DR: In this paper, physical adsorption and photocatalytic reduction of eight environmentally significant metal ions in TiO2 suspensions of Degussa P25 and Hombikat UV100 were investigated.

380 citations


Journal ArticleDOI
TL;DR: In this article, the authors reviewed the modelling efforts on the flow patterns published in the last 30 years with relatively more focus on the last 10 years, focusing on cylindrical bubble columns where results on flow pattern could be extended to the design.

362 citations


Journal ArticleDOI
TL;DR: In this article, the use of large eddy simulations (LES) in numerical simulations of the gas-liquid flow in bubble columns is studied, and the LES shows better agreement with the experimental data than simulations using the k-var epsilon model, when the drag, lift and virtual mass forces are used, the transient behaviour that was observed in experiments can be captured.

321 citations


Journal ArticleDOI
TL;DR: In this paper, the influence of the container walls on the pressure drop of packed beds is investigated and a detailed analysis of more than 2300 experimental data points reveals the Reynolds number dependence of this effect.

312 citations


Journal ArticleDOI
TL;DR: In this article, a two-dimensional multi-fluid Eulerian CFD model with closure laws according to the kinetic theory of granular flow has been applied to study the influence of the coefficient of restitution on the hydrodynamics of dense gasfluidised beds.

300 citations


Journal ArticleDOI
TL;DR: In this paper, a methodology is presented for designing photobioreactors with tubular loop solar receivers in which the fluid is circulated by an air-lifting device, which effectively combines the relevant aspects of external irradiance-dependent cell growth, oxygen accumulation in the solar loop, oxygen removal in the air-lifting device, and hydrodynamics of the airlift system that determine the flow velocity through the solar receiver.

282 citations


Journal ArticleDOI
TL;DR: In this article, a three-dimensional dynamic Eulerian-Eulerian two-phase model is used for the modelling of bubble column hydrodynamics in the homogeneous flow regime.

273 citations


Journal ArticleDOI
TL;DR: In this paper, a commercial CFD code (CFX-5.3) is used to predict the pressure drop characteristics of packed beds of spheres that have a tube-toparticle-diameter ratio of 1.00 to 2.00.

Journal ArticleDOI
TL;DR: In this paper, the effect of surface chemistry and particle physics on the rheology of metal oxide suspensions is reviewed, and the influence of variables, including solids concentration, particle size and size distributions are examined at various interparticle interaction conditions controlled by pH, electrolyte concentration, and/or addition of various additives for both flocculated and well-dispersed suspensions.

Journal ArticleDOI
Dominique Thomas1, P. Penicot1, P. Contal1, D. Leclerc1, J. Vendel 
TL;DR: In this paper, a depth and surface filtration model has been developed based on the distinction between the fibres of the filter and deposited particles resulting in additional fibres inside the filter or on the filter surface.

Journal ArticleDOI
TL;DR: In this paper, a model is proposed which gives correlations based on di2erent mass transfer steps for Taylor 4ow in capillaries, and the overall mass transfer group kova ranges from 0.5 to 1: 5s −1, which shows that excellent mass transfer can be achieved for gas-liquid-solid reactions in monolith reactors.

Journal ArticleDOI
TL;DR: In this paper, an attempt has been made to reconcile and to critically analyze the voluminous literature available on the flow of rheologically complex fluids through unconsolidated fixed beds and fluidised beds.

Journal ArticleDOI
TL;DR: In this paper, a parametric study of natural gas production from the decomposition of methane hydrate in a confined reservoir by a depressurizing well is presented, where the one-dimensional linearized model suggested by Makogon is used in the analysis.

Journal ArticleDOI
TL;DR: In this paper, both commercially available surfactants and synthesized anti-agglomerants were tested in high-pressure apparatuses at typical pipeline conditions, and they were chosen based on their hydrophilic-lipophilic balance (HLB).

Journal ArticleDOI
TL;DR: In this article, the authors emphasize an interdisciplinary approach to multifunctional reactor design, and use examples from commercially practiced technologies to illustrate how process intensification can be achieved through multifunctionAL reactors.

Journal ArticleDOI
TL;DR: In this paper, the main purpose of an LCA is to provide a quantitative assessment of the environmental impact of products over their entire life cycle, with a view to making improvements.

Journal ArticleDOI
TL;DR: In this article, a review of the state-of-the-art models for single particle olefin polymerization models is presented, with special attention paid to particle growth, polymerization rates, concentration and temperature radial profiles, polymer microstructure, and particle morphology.

Journal ArticleDOI
TL;DR: In this paper, Positron emission particle tracking (PEPT) was used to study the motion of glass beads in a vertical axis mixer with slowly rotating flat blades, and the results showed that different sets of assumptions predicted the detailed motion more accurately in different parts of the bed.

Journal ArticleDOI
TL;DR: In this paper, the authors highlight the use of passive measurement of acoustic emissions created by a process as a potentially non-invasive, real-time monitoring technique to be used in process control.

Journal ArticleDOI
Götz Veser1
TL;DR: In this article, a sample and flexible quartz-glass-based micro-reactor design is presented for high-temperature catalytic gas-phase reactions, withstanding extremely high reaction temperatures in excess of 1000°C without any signs of degradation.

Journal ArticleDOI
TL;DR: In this article, a simple physical model for homogeneous-heterogeneous regime transition in bubble columns is developed, which is based on hydrodynamic coupling between gas and liquid phases and gives formulas for the voidage-gas flow rate dependence separately for the homogeneous regime, heterogeneous regime and transition regime.

Journal ArticleDOI
TL;DR: In this article, a methodology has been developed for the design of cooling networks to satisfy any supply conditions for the cooling tower and a model of cooling tower performance has been explored systematically.

Journal ArticleDOI
TL;DR: In this paper, population balance equations have been combined to a classical hydrodynamic Euler/Euler simulation to investigate the operation of a cylindrical bubble column, showing that two domains of superficial gas velocities can be distinguished.

Journal ArticleDOI
TL;DR: In this article, the real-time cross-sectional distributions of the gas holdups in gas-liquid and gas liquid-solid systems are measured using electrical capacitance tomography.

Journal ArticleDOI
TL;DR: In this article, a combined mass transfer-reaction kinetics-equilibrium model with the appropriate use of model parameters can effectively represent CO 2 mass transfer for the aqueous amine blends of methyldiethanolamine (MDEA) and MEA, as well as 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA).


Journal ArticleDOI
TL;DR: In this article, the authors used the modified Cahn-Hilliard equation to predict non-equilibrium morphologies in binary and ternary polymers, including dual-continuous phases, dual-dispersed phases, core-shell particles and more complex structures.