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Mathematical Modeling and Genetic Algorithm Optimization of Reactive Absorption of H2S

05-11-2014 | Fatemeh Bashipour, Saied Nouri Khorasani, Amir Rahimi, Chemical Engineering & Technology, 2014

Abstract A rate‐based mathematical model was developed for the reactive absorption of H2S in NaOH, with NaOCl or H2O2 as the chemical oxidant solutions in a packed column. A modified mass transfer coefficient in the gas phase was obtained by genetic algorithm and implemented in the model to ...

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Effect of fiber size on structural and tensile properties of electrospun polyvinylidene fluoride fibers

18-10-2014 | Avinash Baji, Yiu‐Wing Mai, Shing‐Chung Wong, Polymer Engineering and Science, 2014

We use electrospinning to obtain polyvinylidene fluoride (PVDF) fibers and demonstrate simultaneous improvements in β‐crystal microstructure and in tensile properties of fibers with reduction of their diameter. PVDF fibers with average diameters ranging from 70 to 400 nm are obtained by ...

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Processing oxidic waste of lead‐acid batteries in order to recover lead

17-10-2014 | Traian Buzatu, Mircea Ionut Petrescu, Valeriu Gabriel Ghica, Mihai Buzatu, Gheorghe Iacob, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT The main process parameters have been investigated with a relatively new method for lead recovery from oxidic paste. The method consisting in leaching with NaOH and is also useful for processing other secondary resources (volatile dusts resulted from metallurgical extraction of lead ...

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Analysis of the transformation behaviors of a Chinese coal ash using in‐/ex‐situ XRD and SEM‐EXD

17-10-2014 | Xiongchao Lin, Caihong Wang, Jin Miyawaki, Yonggang Wang, Seongho Yoon, Isao Mochida, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT Crystal and phase transitions of a Chinese Datong coal ash were evaluated using room temperature X‐ray diffraction (RT‐XRD), in‐situ high temperature (HT)‐XRD, and scanning electron microscope combining energy dispersive X‐ray analysis (SEM‐EDX) as temperature varied from 300 °C to ...

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Statistical optimization of culture medium for the overproduction of chicken anemia virus immunogen‐ VP1 protein in a recombinant E. coli for vaccine application

17-10-2014 | Meng‐Shiou Lee, I‐Fen Lin, Guan‐Hua Lai, Yen‐Chang Lin, Ken‐Yuon Li, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT The capsid protein VP1 of chicken anemia virus (CAV) is an immunogen usually to be used when developing the diagnostic kits and subunit vaccines. In this study, a codon‐optimized VP1 gene of CAV was used to express VP1 in Escherichia coli. To establish the best culture medium for VP1 ...

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Rheology of suspensions of solid particles in power‐law fluids

15-10-2014 | Rajinder Pal, The Canadian Journal of Chemical Engineering, 2014

Abstract The viscous behaviour of concentrated suspensions of solid particles in non‐Newtonian powerlaw fluids is discussed here. After a brief review of the existing models, new models are presented for the constant shear‐rate relative viscosity of concentrated suspensions with powerlaw ...

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Development of a thermodynamic identification tool for CO2 capture by chemical absorption

15-10-2014 | Anthony Biget, Thibaut Neveux, Jean‐Pierre Corriou, Yann Le Moullec, The Canadian Journal of Chemical Engineering, 2014

Abstract The extended UNIQUAC model has been used for the representation of the thermodynamic behaviour of CO2 absorption in aqueous amine solutions. Based on available experimental data, an identification methodology has been developed to fit the extended‐UNIQUAC model parameters. In the ...

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A versatile and facile surface modification route based on polydopamine for the growth of mof films on different substrates

15-10-2014 | He Zhu, Shiping Zhu, The Canadian Journal of Chemical Engineering, 2014

Abstract Thin MOF‐5 films were grown from various substrates, which were modified by polydopamine – a bio‐inspired multi‐functional coating. A MOF‐5 mother solution was used. These supports included polypropylene (PP) fibrous membranes, PP porous membranes, and aluminum foils. SEM and XRD ...

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Effect of solution pH and influence of water hardness on caffeine adsorption onto activated carbons

09-10-2014 | Osorio Moreira Couto Junior, Inês Matos, Isabel Maria da Fonseca, Pedro Augusto Arroyo, Edson Antônio da Silva, Mari ..., The Canadian Journal of Chemical Engineering, 2014

Abstract There has been little research into the effects of the water hardness and pH of surface waters on the adsorption of caffeine on activated carbons. The aim of this study was to determine the influence of these water characteristics on different activated carbons. Caffeine adsorption ...

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Supercritical CO2 Extraction of 1‐Butanol and Acetone from Aqueous Solutions Using a Hollow‐Fiber Membrane Contactor

08-10-2014 | Teresa Moreno, Stephen J. Tallon, Owen J. Catchpole, Chemical Engineering & Technology, 2014

Abstract Porocritical extraction was applied to the separation of 1‐butanol and acetone from aqueous solutions modeling a typical acetone‐butanol‐ethanol (ABE) fermentation broth. The efficiency of two lab‐scale hollow‐fiber membrane contactors of different was studied under various flow ...

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