Showing papers in "Chemical Engineering Science in 2013"

TL;DR: The aim of this review is to highlight recent advances in hydrogen selective membranes along with the advances for the different types of membrane reactors available (from packed bed to fluidized bed, from micro-reactors to bio-membrane reactors).

TL;DR: In this paper, composites with different types of MWCNTs (MWCNTs-OH, MWC NTs) were successfully prepared for use as bone replacement materials.

TL;DR: In this paper, the effect of porosity on the internal fluid flow and quantify the drag force on particles in packed beds is studied by a parallel lattice Boltzmann (LB) model.

TL;DR: In this article, the authors provide a comprehensive review of nanoporous 1D and 2D materials and discuss the applications of such materials in areas relating to molecular transport and separation, e.g. gas and liquid-phase separations, water purification, and ion-conducting membranes.

TL;DR: This work is using the CUDA technology for the particle simulation and introducing a coupling methodology with a commercial CFD-code and CUDA-based DEM-code running on the GPU suitable for large-scale simulations.

TL;DR: In this article, the authors performed an extensive series of gas hydrate formation and dissociation experiments in a 4-inch diameter flowloop at the ExxonMobil research facility at Friendswood, TX.

TL;DR: In this paper, a comprehensive experimental and modeling study of selective catalytic reduction of NO x with NH 3 was carried out on Fe-ZSM-5 and Cu-chabazite (CHA) catalysts.

TL;DR: In this paper, the capacity of dense suspensions of solid particles to transfer concentrated solar power from a tubular receiver to an energy conversion process by acting as a heat transfer fluid was demonstrated.

TL;DR: 3-D simulations of wormhole formation in carbonate rocks using a two-scale continuum model and a sensitivity analysis of the dissolution process with respect to acid injection rate, dissolution rate constant and rock properties such as initial average permeability, heterogeneity and permeability–porosity relationships.

TL;DR: In this paper, simultaneous membrane distillation-crystallization (SMDC) hybrid desalination technology for concurrent productions of pure water and salt crystal from the saturated brine solutions has been investigated.

TL;DR: In this paper, the authors present a numerical study based on the discrete element method (DEM) to investigate the transverse mixing of wet particles in a rotating drum, where the effects of liquid surface tension, the drum rotation speed and the filling level on particle mixing were investigated.

TL;DR: In this article, the overlapping clusters are passed through a watershedding algorithm in order to segment the groups of bubble object areas into individual bubbles, thus leaving only solitary bubbles within an image.

TL;DR: In this article, the mechanism with which nanobubbles promote physiological activity was investigated using germination tests and nuclear magnetic resonance (NMR) relaxation-time measurements, which indicated that the number of NBs was positively correlated with the T2 value of the water.

TL;DR: In this paper, a possible catalytic oxidation mechanism in the Fe@ACFs/H2O2 system was discussed, which may be a feasible approach for the elimination of widely existing pollutants.

TL;DR: In this article, the possibility of producing low grade crude palm oil (LGCPO)-based biodiesel using a two-stage process in which a phosphonium-based deep eutectic solvent (P-DES) and an alkali are used as catalysts.

TL;DR: In this article, a polyamide/polyacrylonitrile (PAN) composite membrane with enhanced mechanical properties and water permeability for osmotic power generation has been fabricated.

TL;DR: In this article, the authors investigated hydrate formation characteristics with synthetic natural gas at different mono-ethylene glycol (MEG) concentrations by measuring hydrate onset time and subcooling temperature.

TL;DR: In this article, the fluid, particle and collision dynamics inside a fluidized bed granulator are described in detail using coupled DEM-CFD simulations, and three different granulator configurations are compared in terms of their particle-particle interactions, using criteria such as the average particle velocity, angular velocity, average particleparticle and particle-wall collision velocity and the collision frequency.

TL;DR: In this article, the effect of Weber number on spreading of droplets of three different liquids namely water, isopropyl alcohol and acetone was studied using a high speed camera.

TL;DR: In this paper, a numerical framework for simulating biomass fast pyrolysis is developed, where a multi-fluid model is applied to simulate the multi-phase hydrodynamics while global reaction kinetics is used to describe the physicochemical conversion.

TL;DR: In this paper, the authors proposed a lift of the reversible port-hammian system to control contact systems defined on the Thermodynamic Phase Space, which is canonically endowed with a contact structure associated with Gibbs' relation.

TL;DR: In this article, the authors developed a model describing the fuel reactor in the chemical-looping combustion with coal (CLCC) process, which is used to simulate the performance of the 1MWth CLCC rig built in the Technology University of Darmstadt.

TL;DR: In this paper, the perovskite-derived structures are compared, such as the oxygen semi-permeation, the coefficient of thermal expansion, and the chemical stability at high temperature under a reducing atmosphere.

TL;DR: In this paper, the authors report on the destabilization of oil-in-water macro-emulsions prepared with diesel oil dispersed in a continuous water phase and stabilized by an anionic surfactant.

TL;DR: In this article, the 3D full-loop CFD isothermal simulation of a transparent plexi-glass small-scale CFB carbonator built by IFK for the hydrodynamic investigation of the CFB reactor, utilized for the Ca-L process is presented.

TL;DR: In this article, the pathways of H 2 O enhanced Mg(OH) 2 carbonation at elevated temperatures and CO 2 pressures (up to 673 K and 1.52 MPa) in the presence of steam and in the slurry phase were investigated.

TL;DR: In this article, a new solver (catalyticFOAM) is proposed for the solution of Navier-Stokes equations for complex and general geometries for reacting flows at surfaces, based on a detailed microkinetic description of the surface reactivity.

TL;DR: In this paper, the storage capacity, induction time and induction temperature of CO2 hydrates were investigated on pure water, SDS solutions, THF solutions and mixtures of THF and SDS.

TL;DR: In this article, a structure-dependent multi-fluid model (SFM) was proposed to keep the physical nature of these mesoscale structures in mathematical formulation, and the SFM was reduced to the conventional two-fluide model (TFM) as well as the hydrodynamic equations of the bubble-based and cluster-based EMMS (energy minimization multiscale) models by assuming different simplifications of structures.

TL;DR: In this paper, a new colourimetric technique using an oxygen sensitive dye was developed, based on the reduction of a colorimetric indicator in presence of oxygen, this reduction being catalysed by sodium hydroxide and glucose.