Microscale Simulations of Catalyst Deactivation During Gas-Phase Upgrading of Biomass Pyrolysis Vapors
P. N. Ciesielski , D. Robichaud , B. Donohoe , M. Nimlos ,
 Biosciences Center, National Renewable Energy Laboratory, Golden, CO, USA
 National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO, USA
Catalytic fast pyrolysis is a process by which biomass may be converted into liquid hydrocarbon transportation fuels and chemical co-products that are alternative to their petroleum-derived counterparts. Chemical compounds in raw pyrolysis vapor have high oxygen content and therefore must be deoxygenated in order to meet specifications for hydrocarbon fuels. One strategy to accomplish this is ...
D. Sampietro , E. Abarca , M. Bayer , S. Jordana , J. Molinero , T. Tanaka , S. Hashimoto , T. Iwatsuki , H. Onoe , H. Saegusa 
 Amphos 21 Consulting, Barcelona, Spain
 Obayashi Corporation, Tokyo, Japan
 Japan Atomic Energy Agency, Gifu, Japan
The Japan Atomic Energy Agency (JAEA) is carrying out an URL (Underground Research Laboratory) project in Mizunami city, central Japan. The project is a purpose-built generic URL project that is planned for a scientific study of the deep geological environment in fractured crystalline rock as a basis of research and development for geological disposal of nuclear waste. The concrete material ...
Fundamental Three Dimensional Modeling and Parameter Estimation of a Diesel Oxidation Catalyst for Heavy Duty Trucks
A. Holmqvist and C.U.I. Odenbrand
Department of Chemical Engineering, Faculty of Engineering, LTH, Lund University, Lund, Sweden
Mathematical optimization can be used as a computational engine to generate the best solution for a given problem in a systematic and efficient way. In the context of monolithic converter systems, the parameter estimation problem (or inverse problem) is solved using Partial Differential Equations (PDE)-based models of the physical system coupled with an optimization algorithm. These problems are ...
Numerical Modeling and Performance Optimization Study of a Dehumidification Process in Nuclear Waste Storage
Sogin Spa, Rome, Italy
One of the main parameters to consider during the nuclear waste storage design phase is the drum corrosion risk. The humid-air corrosion models available in literature predict that, for carbon steel, the phenomena start to become appreciable for relative humidity (RH) values close to 65%. In general, the corrosion rate increases exponentially with relative humidity above the RH threshold. To ...
A. Fayolas , M.G. Sanku, M. Pascoa, M. Xynou
KTH Royal Institute of Technology, Stockholm, Sweden
The objective of the study is to investigate the chiral separation of Tröger’s base enantiomers using batch chromatography. Because of its resolution, chromatography is often the preferred method for chiral separations. The separation of Tröger’s base is resolved by using the COMSOL Multiphysics® software. It is modeled by one dimension geometry, having the length of the column set and computed ...
Computational Multiphysics to Optimize Humidification Chamber for a Novel PEM Fuel Cell Power System Used in Automobile Application - new
Tata Motors, Bengaluru, Karnataka, India
Proton Exchange Membrane (PEM) fuel cells are quickly becoming an attractive technology due to their ability to meet increasing energy demands in a cleaner, more efficient way compared to existing methods. A fuel cell is an electrochemical device which converts the chemical energy of a fuel and an oxidant directly into electricity without the intermediate step of classical, chemical combustion ...
D. Dalle Nogare and P. Canu
Department of Chemical Engineering Principles and Practice, University of Padova, Padova, Italy
This work investigates the effects of boundary conditions on the species profiles in heterogeneous catalysis, with low Péclet systems. Hydrogen combustion in Helium was chosen because of the high diffusivities. Furthermore, already at T=300°C over a Pt catalyst, kinetics is very fast and the composition gradients at the inlet extremely steep. The issue is analyzed with 1D models, ...
G.M. Mule, A.A. Kulkarni
CSIR - National Chemical Laboratory, Pune, Maharashtra, India
Stirred tanks are widely used in the pharmaceuticals, chemical and paint industries for variety of operations. The fractal impeller is an impeller having a novel design, developed by CSIR-National Chemical Laboratory, Pune, India. The power number of fractal impeller is relatively lower than the conventional impellers. The mixing performance is also relatively better than the conventional ...
E. Gkanas, S. Makridis, E. Kikkinides, A. Stubos
Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
Environmental Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR 'Demokritos', Agia Paraskevi, Athens, Greece
Hydrogen storage in a metal hydride bed, uses an intermetallic alloy that can absorb efficiently high amounts of hydrogen by chemical bonding resulting to metal hydrides. This alloy is capable of absorbing and desorbing hydrogen while maintaining its own structure. The heat, mass and momentum transfer in a metal-hydride reactor is mathematically described by energy, mass and momentum balance ...
G. Salazar Duarte, B. Schürer, C. Voss, D. Bathen
Linde AG, Munich, Germany
Universität Duisburg-Essen, Duisburg, Germany
Pressure Swing Adsorption (PSA) and Temperature Swing Adsorption (TSA) are commonly used for separation/purification of gas mixtures in industrial processes. The cycle time of industrial TSA processes usually ranges from several hours to days. The reason for this long cycle time is the usage of purge gas for heating and cooling the system (direct heating), which limits the application of TSA ...