AIChE Journal

Publisher: American Institute of Chemical Engineers, John Wiley & Sons

Description

The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering.

  • Impact factor
    2.58
  • 5-year impact
    2.54
  • Cited half-life
    0.00
  • Immediacy index
    0.61
  • Eigenfactor
    0.02
  • Article influence
    0.77
  • Website
    AIChE Journal website
  • Other titles
    AIChE journal (Online), AIChE journal, American Institute of Chemical Engineers journal
  • ISSN
    1547-5905
  • OCLC
    43667889
  • Material type
    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

John Wiley & Sons

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • See Wiley-Blackwell entry for articles after February 2007
    • On personal web site or secure external website at authors institution
    • Not allowed on institutional repository
    • JASIST authors may deposit in an institutional repository
    • Non-commercial
    • Pre-print must be accompanied with set phrase (see individual journal copyright transfer agreements)
    • Published source must be acknowledged with set phrase (see individual journal copyright transfer agreements)
    • Publisher's version/PDF cannot be used
    • Articles in some journals can be made Open Access on payment of additional charge
    • 'John Wiley and Sons' is an imprint of 'Wiley-Blackwell'
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: A power-law expression is proposed for correlating the temperature dependence of infinite-dilution activity coefficients for nonelectrolyte solute-solvent binary pairs and for pairs including an ionic liquid: where θij = 0 for Lewis-Randall ideal solutions, θij = 1 for classic enthalpy-based Scatchard-Hildebrand regular solution and van Laar models, and -5 < θij < 5 for most real binaries. The exponent θij is a function of partial molar excess enthalpy and entropy such that. Real binaries are classified into seven types corresponding to distinct domains of and θij. The new method provides a framework for correlating phase-equilibrium driven temperature effects for a wide variety of chemical and environmental applications. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014; 60(10):3675-3690.
  • [Show abstract] [Hide abstract]
    ABSTRACT: With the increasing attention toward sustainable development, biomass has been identified as one of the most promising sources of renewable energy. In order to convert biomass into value-added products and energy, an integrated processing facility, known as an integrated biorefinery is needed. To date, various biomass conversion systems such as gasification, pyrolysis, anaerobic digestion, fermentation, etc. are well established. Due to a large number of technologies available, systematic synthesis of a sustainable integrated biorefinery which simultaneously considers economic performance, environmental impact and energy requirement is a challenging task. In order to address this issue, multi-objective optimization approaches are used in this work to synthesize a sustainable integrated biorefinery. In addition, a novel approach (incremental environmental burden) to assess the environmental impact for an integrated biorefinery is presented. To illustrate the proposed approach, a palm-based biomass case study is solved. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The dynamic adsorption behavior of CO2 under both non-isothermal and nearly isothermal conditions in silica supported poly(ethylenimine) (PEI) hollow fiber sorbents (Torlon®-S-PEI) is investigated in a rapid temperature swing adsorption (RTSA) process. A maximum CO2 breakthrough capacity of 1.33 mmol/g-fiber (2.66 mmol/g-silica) is observed when the fibers are actively cooled by flowing cooling water in the fiber bores. Under dry CO2 adsorption conditions, heat released from the CO2-amine interaction increases the CO2 breakthrough capacity by reducing the severity of the diffusion resistance in the supported PEI. This internal resistance can also be alleviated by prehydrating the fiber sorbent with a humid N2 feed. The CO2 breakthrough capacity of prehydrated fibers is adversely affected by the release of the adsorption enthalpy (unlike the dry fibers); however, active cooling of the fiber results in a constant CO2 breakthrough capacity even at high CO2 delivery rates (i.e., high adsorption enthalpy delivery rates). In full RTSA cycles, a purity of 50% CO2 is achieved and the adsorption enthalpy recovery rate can reach ˜ 72%. Studies on the cyclic stability of uncooled fiber sorbents in the presence of SO2 and NO contaminants indicate that exposure to NO at 200 ppm over 120 cycles does not lead to a significant degradation of the sorbents, but SO2 exposure at a similar high concentration of 200 ppm causes 60% loss in CO2 breakthrough capacity after 120 cycles. A simple amine re-infusion technique is successfully demonstrated to recover the adsorption capacity in poisoned fiber sorbents after deactivation by exposure to impurities such SO2. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • Teh C. Ho, Benjamin S. White
    [Show abstract] [Hide abstract]
    ABSTRACT: The growing need to produce ultra-clean fuels from hydrocarbon mixtures such as petroleum fractions and residues has put increasing pressure on refiners to achieve deep conversions. It is imperative to be able to predict the behavior of such mixtures at high conversions as functions of their properties and reactor type. To this end, treating the reaction mixture as a continuum greatly simplifies the analysis and modeling of the conversion process. However, the continuum approximation can become invalid at very high conversions. Previously, we examined the validity of the approximation for various reactions in plug flow reactors. The present work develops validity conditions for first-order reaction mixtures in reactors with different mixing intensities. In general, backmixing widens the range of validity. In certain cases the continuum approximation is valid at arbitrarily high conversions. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Experimental and numerical investigations were conducted to study the effect of unsteady mass transfer on the dynamics of an organic droplet released in quiescent water. The situation is important and relevant to deep sea oil spill scenario. The droplet contains two components, one is heavier (immiscible) than water and other is lighter (miscible). When released, with an initial mixture density (890-975 kg/m3) lower than that of surrounding water, droplet rises in the column. The mass transfer of lighter solute component into water causes the droplet density to increase and droplet sinks when the density exceeds that of water. A mass transfer correlation accounting for the loss of the solute, based on Reynolds, Grashoff and Schmidt numbers was developed. A 2D axisymmetric CFD model accounting for species transport was developed to emulate the experimental observations. The study also helped in identifying dominant mass transfer mechanisms during different stages of droplet motion. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Spherical architectures of nickel-aluminum layered double hydroxide (NiAl-LDH) with hydrotalcite-like nanoflakes as building blocks were facilely fabricated by precipitation reaction in aqueous solution without any surfactants and organic solvents. Growth of such unique structure undergoes preorganization of primary nanospheres of colloidal amorphous aluminum hydroxide (AAH) in solution, followed by nucleation and crystallizaion of LDH from exterior to interior of AAH spheres by an in situ transformation mechanism. The structure and morphology of LDH spheres depend on both starting raw materials and synthetic parameters including reaction time, reaction temperature and aqueous ammonia dosage. NiAl-LDH sphere as positive electrode material delivers improved rechargeable and discharge-capacity, with the highest discharge capacity of 173 mAh g-1 at a current density of 30 mA g-1 within a potential range from -0.1 to 0.45 V in 10 mol L-1 KOH solution, due to the faster diffusion processes in the spherical architecture than the powder sample. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Instantaneous concentrations of reactive species are simultaneously measured in a planar liquid jet with a second-order chemical reaction A + B R in order to investigate the statistical properties of the chemical reaction rate and the validity of models which have been proposed for concentration correlation. The jet flow contains the reactant A and the ambient flow contains the reactant B. The results show that the concentration correlation of the reactants makes a negative contribution to the mean reaction rate, and this contribution is important in the downstream direction. The concentration correlation changes owing to the chemical reaction. The effects of the chemical reaction on the concentration correlation change with the flow location and the Damköhler number. The concentration correlation predicted by the Toor’s model and the three-environment (3E) model are compared with the experimental results. The results show that these models fail to accurately estimate the concentration correlation. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Clarifying the disintegration mechanism of aggregates in multiphase fluid flow coupled with beads and particulates is important for the optimum design of a wet dispersion process using a stirred media mill. Thus, we develop a numerical method for simulating multiphase flow with beads and particulates using a discrete element method and computational fluid dynamics, and we employ the four-way coupling simulation to study the fluid-bead-particulate-coupled phenomenon that occurs in a simple shear box. The results show that the dominant force causing aggregate disintegration is the fluid force, rather than the bead contact force, because aggregates rarely collide with beads, contact force of which is too small to disintegrate aggregates. Furthermore, aggregates with strong aggregation force are effectively disintegrated by the fluid flow with a dominant high pure-shear rate induced near the bead surfaces by the expansive force, rather than the compressive force. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Dynamic behaviors in a three-dimensional confined impinging jets reactor (CIJR) under excitation were experimentally studied by a flow visualization technique at 75≤Re≤150. The effects of inlet Reynolds numbers (Re), excitation frequencies and excitation amplitudes on the oscillation behaviors in CIJR have been investigated by a Particle Image Velocimetry (PIV) and a high-speed camera. Results indicate that the excitation in the inflow of the opposed jets can induce periodic oscillation of the impingement plane along the axis, whose oscillation frequency is equal to the excitation frequency. At Re≤100, the induced axial oscillation can further cause a deflective oscillation with a frequency nearly equal to the excitation, and the scale of the vortex in the impingement plane is well regulated by the excitation frequency. At Re=150, the excitation of amplitude less than 20% has insignificant effect on the deflective oscillation existing in CIJR. A semiempirical formula has been proposed to predict the oscillation amplitude of the impingement plane in CIJR under excitation. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: This work addresses the operation of lithium ion batteries in discharge and charge processes. A simple phenomenological model is developed in order to predict all variables values. A set of algebraic and differential equations is derived taking into account salt and Lithium balances in electrodes, in the separator, and in particles. Balances are developed for finite volumes and appropriate average values of several variables such as concentrations, current densities, and electrochemical reaction rates are introduced. Definitions of current densities as volume fraction functions are critical issues in the computations. Experimental values taken from the literature for discharge processes are predicted very accurately. Constant salt concentration in the separator can be assumed and consequently the model can be analytically solved. Charge and discharge times, initial cell capacity, lost capacity and relaxation times are easily estimated from simple equations and cell parameters. The limiting processes taking place during cell discharge can be determined. Energy efficiency and capacity usage are quantified for cycles. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Phase resolved PIV measurements were carried out to assess the flow dynamics occurring in orbitally shaken bioreactors of cylindrical geometry when working fluids of increasing viscosity are considered. Study of the phase-resolved flow characteristics allowed to built a Re-Fr map, where four quadrants associated to different flow regimes are identified: in-phase toroidal vortex (low Fr, high Re), out-of-phase precessional vortex (high Fr, high Re), in-phase single vortex (low Fr, low Re), out-of-phase counter-rotating toroidal vortex (high Fr, low Re). Turbulence levels are found to be significant only in the top right quadrant (high Fr, low Re) and scaling of the turbulent kinetic energy obtained with fluid of varying viscosity is obtained by employing the ratio of the operating Froude number to the critical Froude number associated to the mean flow transition, Fr/Frc. Estimates of the mean flow strain deformation as well as of the flow dissipative scale are provided, while a comparison is made between the flow circulation times obtained for different regimes. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: A multi-scale model is presented to elucidate protein adsorption and transport behaviors in ion-exchange chromatography (IEC) adsorbent particles that have either an open pore structure or charged dextran polymers grafted into the pores. Molecular dynamics (MD) simulation is used to determine protein diffusion and partitioning in different regions of the adsorbent pore, and these outputs are used in numerical simulations of mass transfer to determine the intraparticle protein concentration profile and the mass transfer rate. Modeling results indicate that, consistent with experimental observations, protein transport can be faster in the polymer-grafted material compared to the open pore case. This occurs when favorable partitioning of protein into the polymer-filled pore space is combined with relatively high protein mobility within this region. The modeling approach presented here should be applicable to proteins and adsorbents with different properties, and could help elucidate the factors that control adsorption and transport in various IEC systems. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The shear and extensional behavior of two aqueous gum solutions, namely (i) 1-20 g/L guar gum 1and (ii) κ/ι-hybrid carrageenan solutions (5-20 g/L), are shown to exhibit Giesekus-fluid behaviour when in the semi-dilute regime. In this regime a common set of Giesekus fluid parameters described both shear and extensional behavior. A new analytical result describing the extension of a Giesekus fluid in the filament stretching geometry is presented. This also gave reasonable predictions of the Trouton ratio. Higher concentration guar solutions, in the entangled regime, yielded different Giesekus fluid parameters for extension to those for simple shear. The extensional data for all concentrations of both gums collapsed to a common functional form, similar to that reported for cake batters2; the limits of the new filament thinning expression provide insight into this behaviour. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: In coalescence and break-up modeling, vortex number density and size distributions of turbulent vortices are required in order to calculate the rate of interaction between continuous and dispersed phases. Existing number density models are only valid for the inertial subrange of the energy spectrum and no model of the vortex number density, valid for the entire energy spectrum, is available. In the present study, the number density of the turbulent vortices were studied and modeled for the entire energy spectrum including the dissipative, inertial and energy containing subranges. It was observed that the new number density model depends on vortex size, local turbulent kinetic energy and dissipation rate. Moreover, the new number density model was validated by the number density distributions quantified in a turbulent pipe flow. The turbulent vortices of the pipe were identified and labeled using a vortex-tracking algorithm that was developed recently by the authors. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • Xue‐jing Yang, Peng‐fei Tian, Xiao‐man Zhang, Xin Yu, Ting Wu, Jing Xu, Yi‐fan Han
    [Show abstract] [Hide abstract]
    ABSTRACT: Iron oxychloride (FeOCl) supported on mesoporous silica (SBA-15), as a Fenton-like solid catalyst for phenol degradation, showed supreme activity for production of hydroxyl radical (HO·) by H2O2 decomposition, and the generation capacity was comparable to the conventional Fenton reagent (Fe2++H2O2). The structure of FeOCl was characterized with multi spectroscopies. The generation of HO· species during the reaction was detected using 5,5- dimethyl-1-pyrroline N- oxide (DMPO) trapped electron paramagnetic resonance (EPR). Furthermore, the kinetics in detail was driven for the creation and diffusion of HO· by H2O2 decomposition over FeOCl, which follows a first-order rate through a two-step reaction. With the combination of the catalyst structure and kinetic parameters, the plausible mechanism for H2O2 decomposition during the oxidative degradation of phenol was rationalized. As a Fenton-like solid catalyst, FeOCl/SBA-15 is a promising alternative for the removal of low-level organic contaminates from water. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Fire exposure of tanks used for the storage and transportation of liquefied gases under pressure may cause complex heat and mass transfer phenomena that may contribute to compromise the integrity of the vessels in accident scenarios. Heat transfer through vessel lading results in the heat-up of the internal fluid and the increase of vessel internal pressure. However, local temperature gradients in the liquid phase cause liquid stratification phenomena that result in a more rapid vaporization and pressure build-up in the liquid phase. These fundamental phenomena were analyzed by a Computational Fluid Dynamic (CFD) model. The model was specifically focused on the early steps of vessel heat-up, when liquid stratification plays a relevant role in determining the vessel internal pressure. A two-dimensional transient simulation was set up using ANSYS FLUENT in order to predict the evolution of the liquid and vapor phases during the tank heat up. The model was validated against available large scale experimental data available for liquefied petroleum gas (LPG) vessels exposed to hydrocarbon fires, and was applied to case studies derived from recent accidental events in order to assess the expected time of pressure build-up in different fire scenarios. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 08/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The sedimentation of a fibre suspension near a vertical wall is investigated numerically. Initially, the near-wall convection is an upward backflow, which originates from the combined effects of the steric-depleted layer and a hydrodynamically-depleted region near the wall. The formation of the hydrodynamically-depleted region is elucidated by a convection-diffusion investigation, in which fibres are classified according to the different directions in which they drift. For fibres with sufficiently large aspect ratio, the initial near-wall backflow keeps growing. However, the backflow reverses to downward flow at later times if the aspect ratio is small. This is due to the fibre-wall interactions which rotate fibres to such angles that make fibres drift away from the wall, inducing a dense region and a correspondingly downward flow outside the initial backflow. Moreover, the steric-depleted boundary condition is of secondary importance in the generation and evolution of the near-wall convection. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 08/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this work, a new chemical product, i.e. photo-reversibly switchable hydrophobic surface coating, was synthesized by atom transfer radical polymerization (ATRP) and graft-from method based on molecular design. Focusing on the strategy of new product development from the chemical product engineering perspective, the product characterization, switching mechanism analysis, performance evaluation and model interpretation were carried out to confirm the new product manufacture and to ensure the product application with a following aging test. The results show that the product enables surfaces to have reversibly switchable wettability and excellent stability after a month-long test with eight irradiation cycles. Additionally, the wetting behavior of silicon surface can be tuned between hydrophilicity and hydrophobicity based on blank sample using the surface engineering technique (decorated with functional film and surface roughening). The product presented here can be utilized for constructing a hydrophobic surface with photo-induced controllable wettability in moisture-resistance, and it also offers a new technique for the manipulation of liquids in microfluidic devices. © 2014 American Institute of Chemical Engineers AIChE J, 2014
    AIChE Journal 08/2014;

Related Journals