Combustion Study of DDGS Char from Steam-O2 Blown CFB Gasifier and Charcoal Using Thermogravimetric Analysis and COMSOL Multiphysics®
X. Meng, W. de Jong, A.H.M. Verkooijjen
TU Delft, Delft, The Netherlands
To obtain reliable kinetic data for the modeling of Dried Distiller’s grains with Soluble (DDGS) gasification using a 100 kWth steam-O2 blown circulating fluidized bed (CFB) gasifier, the combustion behavior of partially gasified residual DDGS char and pure charcoal as a comparison has been investigated using thermogravimetric analysis (TGA). Two conversion models, volume reaction model (VRM) ...
Effects of Flow and Diffusion on Blood Coagulation in Platelet Poor Plasma: a Two-way Coupling Between Hemodynamics and Biochemistry
D. Magnabosco[1,2], H. van Ooijen, B. Bakker, R. van den Ham
Politecnico di Milano, Milan, Italy
Philips Research, Eindhoven, The Netherlands
Enzyme reactions, blood flow and diffusion in human vasculature play interacting and fundamental roles in blood coagulation. In this complex mechanism, the balance between blood and clot is a delicate equilibrium, whose tight regulation is vital to avoid pathologies such as bleeding and thrombosis. The secondary hemostasis triggered by tissue factor in platelet poor plasma is studied up to ...
S. Mahajani, S. Srikantiah, G. Samdani, A. Ganesh, P. Aghalayam
Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India
Indian Institute of Technology Madras, Chennai, India
UCG is a process which converts coal to syn gas at the underground coal seam itself. UCG can help meeting the rising energy demand by utilizing coal resources that otherwise would be too deep, or of poor quality, or simply not economical to mine. As UCG takes place, a cavity is formed underground in the coal seam which grows three-dimensionally. The objective of this work is to develop a two ...
B. Castro-Dominguez, R. Ma, A. G. Dixon, Y. H. Ma
Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA, USA
The optimization of operating conditions in multitube membrane modules is highly complex. The multiple physics and irregular geometries involved create a challenge for predicting their behavior. This work analyzes the performance of H2 purification through a module containing seven membranes. Using experimental parameters, a 3-D model was devised, specifying the membrane as a reacting boundary ...
A. Warning, A. K. Datta
Department of Biological & Environmental Engineering, Cornell University, Ithaca, NY, USA
Predictive food microbiology currently first requires experimental data for growth on fresh produce and then fitting an empirical or semi-empirical model to the data, making extrapolation to other conditions (temperature, type of produce) difficult. Herein, we develop a mechanistic model for the growth of human pathogenic bacteria (Escherichia coli O157:H7 and Salmonella spp.) on spinach using ...
Numerical Modeling of the Original and Advanced TEMKIN Reactor for Catalysis Experiments in Laboratory Scale - new
D. Götz, M. Kuhn, P. Claus
Ernst-Berl-Institute/Chemical Technology II, Darmstadt, Germany
Many industrial, especially heterogeneously catalysed, processes are characterised by a strong interaction between the reaction kinetics and transport phenomena. Because experiments in laboratory scale can be very time- and cost-intensive, Temkin andKul’kova developed a new reactor design for the direct testing of industrial catalysts. Based on this concept of linearly alternating catalyst and ...
Three-Dimensional Percolation Properties Simulation of a Marine Coating Based on Its Real Structure Obtained from Ptychographic X-Ray Tomography - new
B. Chen, M. Guizar-Sicairos, G. Xiong, L. Shemilt, A. Diaz, J. Nutter, N. Burdet, S. Huo, F. Vergeer, A. Burgess, I. Robinson
London Centre for Nanotechnology, University College London, London, UK
Paul Scherrer Institute, Villigen, Switzerland
AkzoNobel Co. Ltd., Sassenheim, Netherlands
AkzoNobel (UK) Co. Ltd., Tyne and Wear, UK
We present quantitative nano-scale analysis of the 3D spatial structure of an anticorrosive aluminium epoxy barrier marine coating obtained by ptychographic X-ray computed tomography (PXCT) [1-3]. We then use COMSOL Multiphysics® software to perform simulations on the acquired real 3D structure to demonstrate how percolation through this actual 3D structure impedes ion diffusion in the ...
M. Sramek, J. Weiss, R. Kohlus
Department of Food Processing Engineering, Institute of Food Science and Biotechnology, Hohenheim University, Stuttgart, Germany
Department of Meat Science and Food Physics, Institute of Food Science and Biotechnology, Hohenheim University, Stuttgart, Germany
The mathematical model is closely related to the development of a novel drying method for high viscous and sticky materials. The foamed state facilitates diffusive moisture transport and therefore accelerating the drying process. Moreover the dried porous material can be easily converted into the powder. The mathematical modelling aimed at evaluating the complex drying process as basic ...
V. Runkana, A. Pareek, P. Arora
Tata Consultancy Services, Pune, Maharashtra, India
Indian Institute of Technology Delhi, New Delhi, Delhi, India
Limited drug efficacy, undesirable temporal changes in drug concentration and patient non-compliance due to frequent dosing schedule have given impetus to design of controlled drug release systems . Biodegradable polymers due to their favorable and tunable properties and biocompatibility have found widespread use in the field of controlled drug delivery . Exploratory in vitro experiments ...
O. Silva , E. Abarca , J. Molinero , U. Kautsky 
 Amphos 21 Consulting, Barcelona, Spain
 Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden
Radionuclide sorption is often simulated using a lumped approach where retention processes are represented by the distribution coefficient (Kd), which relates the radionuclide mass retained in the solid phase to its aqueous concentration. Classical Kd-based simulations rely on two strong assumptions: Kd depends on soil properties and is constant in time. However, sorption processes depend also ...