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Vol. 48 N° 11 Juin 2009 |
Vol. 48 N° 16 Août 2009 |
Vol. 48 N° 15 Août 2009 |
Vol. 48 N° 17 Septembre 2009 |
Vol. 48 N° 19 Octobre 2009 |
Vol. 48 N° 18 Septembre 2009 |
Vol. 48 N° 20 Octobre 2009 |
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| Titre : | Industrial & engineering chemistry research, Vol. 48 N° 17 - Septembre 2009 |
| Type de document : | Bulletin : texte imprimé |
| Paru le : | 01/12/2009 |
| Année de publication : | 2009 |
| Format : | p. 7861-8311 / ill. / 28 cm |
| Note générale : | Chemical engineering |
| Langues : | Français |
| En ligne : | http://pubs.acs.org/toc/iecred/48/17 |
Dépouillements
Article : texte imprimé
Evgeny Shafirovich, Auteur ;
Arvind Varma, Auteur
|
Coal gasification is a promising option for the future use of coal. Similarly to gasification in industrial reactors, underground coal gasification (UCG) produces syngas, which can be used for power generation or for the production of liquid hyd[...]
Article : texte imprimé
Arnab Atta, Auteur ;
S. A. Razzak, Auteur ;
K. D. P. Nigam, Auteur
|
Accepting considerable advantages of circulating fluidized beds (CFBs) over the conventional fluidized beds, there has been numerous studies on CFBs concentrating primarily on the development of gas−solid circulating fluidized beds (GSCFBs). How[...]
Article : texte imprimé
Sujata Mandal, Auteur ;
S. Mayadevi, Auteur ;
Bhaskar D. Kulkarni, Auteur
|
Layered double hydroxide materials (Zn/Al, Mg/Al, Zn/Fe) with varying composition (M2+:M3+ molar ratio, x = 3, 2, 1, and 0.33) were synthesized and evaluated for their selenium adsorption characteristics in aqueous medium. Zn/Al and Mg/Al LDHs w[...]
Article : texte imprimé
Jiawei Wang, Auteur ;
Faiza Hassan, Auteur ;
Peter I. Chigada, Auteur
|
The isomerization and oligomerization of 1-hexene was studied over ZSM-5 catalyst under sub- and supercritical conditions within a down-flow fixed bed reactor in the temperature range of 220−250 °C and pressure range 10−70 bar. The catalyst acti[...]
Article : texte imprimé
Vivek P. Utgikar, Auteur
|
Gas−liquid−noncatalytic solid reactions are typically conducted in three phase sparged reactors. Modeling of the particle size residence time distribution (RTD) and verification/validation of the models is essential for fundamental understanding[...]
Article : texte imprimé
Ganapati D. Yadav, Auteur ;
Indrakant V. Borkar, Auteur
|
Citronellyl acetate (also known as citronellol acetate) is an important perfumery chemical which can be produced both by chemical catalysis and by biocatalysis. In the current work, Novozym 435 (Candida antarctica lipase B immobilized on polyacr[...]
Article : texte imprimé
Vishwanath G. Deshmane, Auteur ;
Parag R. Gogate, Auteur ;
Aniruddha B. Pandit, Auteur
|
The present work aims at exploiting palm fatty acid distillate as a starting raw material for synthesis of biodiesel with the aim of reducing the cost of production. Esterification of palm fatty acid distillate (PFAD) with methanol in the presen[...]
Article : texte imprimé
Yi-Ning Wang, Auteur ;
Faïçal Larachi, Auteur ;
Shantanu Roy, Auteur
|
The dynamics of gas−solid flows and distribution in monolithic multichannel microcirculating fluidized-bed reactors was analyzed using a computational fluid dynamics (CFD) modeling approach. A 2D Euler−Euler multiphase model with the kinetic the[...]
Article : texte imprimé
R. Kaji, Auteur ;
D. Zhao, Auteur ;
P. Licence, Auteur
|
Gas bubbling through a column of ionic liquid has been investigated using high-speed video and a conductivity method to measure a cross-sectionally averaged void fraction. For comparison, other liquids with similar physical properties, e.g., a g[...]
Article : texte imprimé
Shad W. Siddiqui, Auteur ;
Yinan Zhao, Auteur ;
Alena Kukukova, Auteur
|
The confined impinging jet reactor (CIJR) has attracted wide interest in the past few years because of the efficient micromixing that it offers. In this work, the CIJR is characterized over a wide range of mixing conditions, using three measures[...]
Article : texte imprimé
Muhammad F. Irfan, Auteur ;
Sang Done Kim, Auteur ;
Muhammad R. Usman, Auteur
|
The NO reduction over CuO/γ-Al2O3 catalyst in a bubbling fluidized bed reactor has been determined on the basis of the two-phase model at the maximum conversion temperature of 300 °C. This temperature is critical as it deals maximum conversion, [...]
Article : texte imprimé
Masahiro Tokumura, Auteur ;
Takashi Katoh, Auteur ;
Hiroki Ohata, Auteur
|
Ozone decolorization and mineralization of azo dye Orange II were examined. In order to elucidate the dynamics of the oxidation process by ozone, the rate-based model consisting of the rates of chemical reaction and gas−liquid mass transfer was [...]
Article : texte imprimé
Hyun-Seob Song, Auteur ;
Doraiswami Ramkrishna, Auteur
|
A strategy is presented for scrutiny of the quasi-steady-state (QSS) approximation in metabolic modeling that involves tracking dynamic data on extracellular products in so-called flux, as well as yield vector spaces when the substrate uptake fl[...]
Article : texte imprimé
Radmila Jevtic, Auteur ;
P. A. Ramachandran, Auteur ;
Milorad P. Dudukovic, Auteur
|
Cyclohexane oxidation is the first step in the currently used technology for production of Nylon-6 and Nylon-6,6 which employs a two-stage process. In the first stage, cyclohexane is oxidized with air to 4−8% conversion at about 80% selectivity [...]
Article : texte imprimé
Zhengjie Zhu, Auteur ;
Carlos A. Dorao, Auteur ;
D. Lucas, Auteur
|
In this work, a cross-sectional averaged two-fluid model combined with a population balance model is applied to simulate the flow field and the bubble size distributions in a two-phase bubble column. The Martinez-Bazan breakage kernel and a modi[...]
Article : texte imprimé
Ahmed A. Youssef, Auteur ;
Muthanna H. Al-Dahhan, Auteur
|
Most industrial applications involving bubble columns require the addition of internals for heat exchanging. However, most academic research on bubble columns has been performed in hollow (empty) ones. Hence, the impact of internals on the hydro[...]
Article : texte imprimé
Shailesh Nagarkar, Auteur ;
Avinash Patil, Auteur ;
Ashish Lele, Auteur
|
We provide some new insights into the kinetics and mechanism of sol−gel transition as it pertains to regenerated silk fibroin, which is the principle structural protein of silkworm silk fiber. Silk fibroin was dissolved in lithium bromide and di[...]
Article : texte imprimé
Paul Stevenson, Auteur ;
Seher Ata, Auteur ;
Geoffrey M. Evans, Auteur
|
A force balance is presented for a particle attached to the surface of a larger bubble that oscillates such as it would immediately after a coalescence event. Similar previous analyses have neglected the Basset history force, the added mass of t[...]
Article : texte imprimé
Chandra S. Sharma, Auteur ;
Devendra K. Upadhyay, Auteur ;
Ashutosh Sharma, Auteur
|
Carbon xerogel microspheres were synthesized by inverse emulsion polymerization of resorcinol with formaldehyde, followed by pyrolysis at 900 °C under nitrogen atmosphere. We have studied the effect of various synthesis parameters, including dil[...]
Article : texte imprimé
Derek W. Griffin, Auteur ;
Duncan A. Mellichamp, Auteur ;
Michael F. Doherty, Auteur
|
A simple classification procedure for determining optimal steady-state operating policies for plants with recycle has recently been developed by Griffin et al. to cover complex process chemistries. (Griffin, D. W.; Mellichamp, D. A.; Doherty, M.[...]
Article : texte imprimé
Pan Li, Auteur ;
Hideki Tsuge, Auteur ;
Keiko Itoh, Auteur
|
A large quantity of dimethyl sulfoxide (DMSO) wastewater is discharged from washing and rinsing processes in semiconductor manufacturing industry. Traditional biological treatment is known to be difficult for the treatment of DMSO-containing was[...]
Article : texte imprimé
Manojkumar Ramteke, Auteur ;
Santosh K. Gupta, Auteur
|
Several of the recent optimization techniques have been adapted from nature. The elitist nondominated sorting genetic algorithm with the adapted jumping gene operator (NSGA-II-aJG) is one such evolutionary technique inspired by genetics. This al[...]
Article : texte imprimé
Robert A. Urban, Auteur ;
Bhavik R. Bakshi, Auteur
|
Despite the popularity of life cycle assessment (LCA) for understanding the broader implications of technological alternatives, it faces challenges due to difficulties in defining the analysis boundary, uncertain data, and ignoring the role of e[...]
Article : texte imprimé
Sanjay P. Mishra, Auteur ;
Vilas G. Gaikar, Auteur
|
A simple and rapid method based on hydrotropic solubilization is developed for isolation of forskolin from coleus forskohlii roots. The plant cells are permeabilized by aqueous hydrotrope solutions followed by extraction and solubilization of fo[...]
Article : texte imprimé
Y. He, Auteur ;
N. G. Deen, Auteur ;
M. van Sint Annaland, Auteur
|
Numerical simulations were performed of a turbulent gas-particle multiphase flow in a circulating fluidized bed riser using a hard-sphere discrete particle model (DPM) for the particle phase and the Navier−Stokes equations for the gas phase, whe[...]
Article : texte imprimé
Deepak Goel, Auteur ;
Vivek V. Buwa, Auteur
|
Gas−liquid flow in microchannels is of fundamental importance to many engineering applications involving microreactors, monolith reactors, microheat exchangers, and several other microfluidic devices. Slug flow, characterized by motion of long b[...]
Article : texte imprimé
Population balance modeling of liquid-liquid dispersions in homogeneous continuous-flow stirred tank
Singh, K. K., Auteur ;
S. M. Mahajani, Auteur ;
K. T. Shenoy, Auteur
|
This work presents population balance modeling to predict representative drop sizes and drop size distributions in dispersions of dilute phosphoric acid in a mixture of n-paraffin, tributyl phosphate, and di-2-ethyl hexyl phosphoric acid (D2EHPA[...]
Article : texte imprimé
Sarah M. Monahan, Auteur ;
Rodney O. Fox, Auteur
|
The multiphase flow simulated in this work corresponds to the pseudo-2D bubble-column experiments at Delft University of Technology (Harteveld et al. Can. J. Chem. Eng. 2003, 81, 389−394). As in the work of Monahan and Fox (AIChE J. 2007, 53, 9−[...]
Article : texte imprimé
Yann Bouremel, Auteur ;
Michael Yianneskis, Auteur ;
Andrea Ducci, Auteur
|
Novel three-dimensional methodologies suitable for the characterization and quantification of the deformation dynamics resulting from vortical structures in stirred vessels are presented. The analytical approaches are developed in the context of[...]
Article : texte imprimé
Kalekudithi Ekambara, Auteur ;
R. Sean Sanders, Auteur ;
K. Nandakumar, Auteur
|
The behavior of horizontal solid−liquid (slurry) pipeline flows was predicted using a transient three-dimensional (3D) hydrodynamic model based on the kinetic theory of granular flows. Computational fluid dynamics (CFD) simulation results, obtai[...]
Article : texte imprimé
Jianhua Chen, Auteur ;
Ning Yang, Auteur ;
Wei Ge, Auteur
|
This article investigates the two regime transition points for bubble columns with the so-called dual-bubble-size (DBS) model featuring the utilization of a stability condition to analyze the compromise between dominant mechanisms. Our previous [...]
Article : texte imprimé
Krishna Vijayaraghavan, Auteur ;
Alex Nikolov, Auteur ;
Darsh Wasan, Auteur
|
Recent experiments on the foamability of liquid particle suspensions (with a particle size varying from nanometers to micrometers in diameter and in the absence of any surfactants) have shown that the foamability correlates well with the degree [...]
Article : texte imprimé
M. R. Rampure, Auteur ;
S. M. Mahajani, Auteur ;
V. V. Ranade, Auteur
|
Most laboratory bubble columns are equipped with sieve plate spargers. The sieve plate spargers are known to lead to nonuniform gas distribution. It is important to account for such nonuniform gas distribution at the sparger in the computational[...]
Article : texte imprimé
A. A. Kulkarni, Auteur ;
V. S. Kalyani, Auteur
|
Two-phase flow in mini-channels (1 mm × 1.5 mm × 430 mm and 1.5 mm × 0.5 mm × 430 mm serpentine channel geometry) made in different materials (SS 316, PMMA and Teflon) was studied at different flow rate ratio (0.66, 1.0 and 1.56) of the two immi[...]
Article : texte imprimé
C. P. Stemmet, Auteur ;
Jaap C. Schouten, Auteur ;
T.A. Nijhuis, Auteur
|
This paper presents the use of UV−vis and Raman spectroscopy to measure the state of a solid in a multiphase reactor. A slurry of particles and a packed bubble column were used. As this study is a proof of principle a model for an active catalys[...]
Article : texte imprimé
Asima Shaukat, Auteur ;
Yogesh M. Joshi, Auteur ;
Ashutosh Sharma, Auteur
|
In this paper, we study deformation, failure, and breakage of visco-elastic thin films of aging laponite suspension under a tensile deformation field. Aqueous suspension of laponite is known to undergo waiting time dependent evolution of its mic[...]
Article : texte imprimé
A. A. Soares, Auteur ;
J. Anacleto, Auteur ;
L. Caramelo, Auteur
|
The heat transfer characteristics from a circular cylinder immersed in power law fluids have been studied in the mixed convection regime when the imposed flow is oriented normal to the direction of gravity. The continuity, momentum, and thermal [...]
Article : texte imprimé
Yogesh M. Joshi, Auteur
|
A scaling model is developed to correlate relaxation time distribution of soft glassy materials to ultimate recovery. We propose that in the limit of creep-recovery time smaller than age, time translational invariance can be applied to aging sof[...]
Article : texte imprimé
Sandra Orvalho, Auteur ;
Marek C. Ruzicka, Auteur ;
Jiri Drahos, Auteur
|
Experiments were performed in a laboratory scale bubble column, to investigate the effect of electrolytes (inorganic salts) on the behavior of bubbly mixtures. Aqueous solutions of three salts were studied, Na2SO4 (p.a. grade), NaCl (p.a. grade)[...]
Article : texte imprimé
Jyeshtharaj B. Joshi, Auteur ;
Mandar V. Tabib, Auteur ;
Sagar S. Deshpande, Auteur
|
Most chemical engineering equipment is operated in the turbulent regime. The flow patterns in this equipment are complex and are characterized by flow structures of wide range of length and time scales. The accurate quantification of these flow [...]
Article : texte imprimé
Channamallikarjun S. Mathpati, Auteur ;
Mandar V. Tabib, Auteur ;
Sagar S. Deshpande, Auteur
|
There have been several approaches in the literature to identify and characterize flow structures qualitatively as well as quantitatively. In the first part of this review, the methodologies and applications of various experimental fluid dynamic[...]
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