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Experimental investigation of steam‐CO2‐foam flooding: combination of CO2‐foam flooding and steam injection as an effective enhanced oil recovery (EOR) method in heavy oil reservoirs

01-Apr-2015 | H. Nejatian Daraei, E. Khodapanah, E. Sahraei, Asia-Pacific Journal of Chemical Engineering, 2015

ABSTRACT The effects of steam‐CO2‐foam flooding on the recovery of medium–heavy crude oil have been studied using sand pack models under reservoir conditions of 1550 psi and 131 °F. In order to investigate the enhanced oil recovery (EOR) potential of steam‐CO2‐foam flooding, three different ...

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Novel electrical conductive hybrid nanostructures based on PA 6/MWCNTCOOH electrospun nanofibers and anchored MWCNTCOOH

28-Mar-2015 | João Paulo Ferreira Santos, Aline Bruna da Silva, Uttandaraman Sundararaj, Rosario E.S. Bretas, Polymer Engineering and Science, 2015

Electrical conductive nanostructures made of nanofibers of poly (amide 6) (PA6) with carboxyl functionalized multiwall carbon nanotubes (MWCNTCOOH) and anchored MWCNTCOOH were produced. The nanotubes were surface activated with carboxyl groups, dispersed in formic acid and added to a formic acid ...

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Analysis of a blast due to inadvertant mixing of ammonium sulfate and sodium hyplochlorite

26-Mar-2015 | Graeme W. Norval, Process Safety Progress, 2015

Ammonium sulfate and sodium hypochlorite are common industrial chemicals, often used together in water treatment. The consequences of mixing hypochlorite (chlorine) solution with ammonia solutions are well understood within the chlorine industry; detonable chloramines are produced. This ...

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Enhancement of electric properties of polypyrrole by copper electrodeposition

13-Mar-2015 | Chikouche Imene, Sahari Ali, Zouaoui Ahmed, Tingry Sophie, The Canadian Journal of Chemical Engineering, 2015

Abstract Polypyrrole films (2–3.5 µm thick) were electrosynthetized in organic media by potentiodynamic electropolymerization on silicon surfaces. To improve the electronic conductivity of the polypyrrole films, elemental copper was electrodeposited directly on the film surface by simple ...

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Stability of Three‐Phase Water‐Particle‐Oil Systems

10-Mar-2015 | Izabela Polowczyk, Anna Bastrzyk, Tomasz Koźlecki, Zygmunt Sadowski, Chemical Engineering & Technology, 2015

Abstract The stability of three‐phase systems consisting of oil and a solid phase dispersed in aqueous solutions is examined. To achieve a sufficiently hydrophobic surface of the solid particles, the surface of glass microspheres was modified with ionic surfactants. The destabilization ...

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LTA/Poly(1‐trimethylsilyl‐1‐propyne) Mixed‐Matrix Membranes for High‐Temperature CO2/N2 Separation

04-Mar-2015 | Ana Fernández‐Barquín, Clara Casado‐Coterillo, Miguel Palomino, Susana Valencia, Angel Irabien, Chemical Engineering & Technology, 2015

Abstract Mixed‐matrix membranes (MMM) consisting of poly(1‐trimethylsilyl‐1‐propyne) (PTMSP) as continuous matrix and small‐pore LTA‐framework zeolites with Si/Al ratios from 1 (commercial zeolite A) to ∞ (ITQ‐29) as dispersed phase were prepared by solution casting. The thermal stability of ...

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Robust Multiobjective Optimization Applied to Optimal Control Problems Using Differential Evolution

04-Mar-2015 | Davi L. Souza, Fran S. Lobato, Rubens Gedraite, Chemical Engineering & Technology, 2015

Abstract Robust optimization is an approach for modeling optimization problems under uncertainty where the modeler aims at finding decisions that are optimal for the worst‐case realization of the uncertainties within a given set of values. Typically, the original uncertain optimization problem ...

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Effect of fluid velocity on radioactive ion retention by fluidized bed reactor

21-Feb-2015 | Mohamed Abdelaziz, Azza H. Ali, Hesham F. Elbakhshawangy, Sameh H. Othman, The Canadian Journal of Chemical Engineering, 2015

This study is concerned with the design, construction, simulation, and pre‐operation of a fluidized bed reactor for low level radioactive waste treatment by a new chelating resin. In this respect a new mathematical model is suggested to account for the effect of fluid velocity and to determine ...

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Heat Transfer Phenomena of Power Law Fluids in Double‐Pass Heat Exchangers with Isoflux Conditions

18-Dec-2014 | Chii‐Dong Ho, Gwo‐Geng Lin, Thiam Leng Chew, Wei‐Hao Lan, Cheng‐Yi Lin, Chemical Engineering & Technology, 2014

Abstract A new design of conjugated heat transfer in double‐pass parallel‐plate laminar countercurrent operations of power law fluids under wall isoflux was investigated experimentally and theoretically. The analytical solutions were obtained with a superposition model by introducing an ...

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Analytical solution of turbulent pipe flow according to second‐gradient theory

17-Dec-2014 | H. Biglarian, H. Beyrami, Q. Dorosti, A. Sattari, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT This paper presents a gradient theory of grade two based on an axiomatic conception of a nonlocal continuum theory for materials of grade n. The general classical model of linear momentum equation that is depending on the second‐order strain rate tensor and its gradients up to grade ...

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