A study to further simulation research of a commercial chemical vapor deposition (CVD) reactor is presented. A simulation is created using the computational fluid dynamics software package, Fluent (version 4). The variation of gas temperature inside the reactor system, as a function of gas flow rate, is examined. Data is collected for trials of several initial flow rates and iterations. Results...

A large number of chemical, bio-chemical and pollution-control processes use heterogeneous fixed-bed reactors. The use of finite hollow cylindrical catalyst pellets can enhance conversion levels in such reactors. The absence of the pellet core can significantly lower the diffusional resistance associated with the solid phase. This leads to a better utilization of the catalytic material, which i...

INTRODUCTION Muhiphase reactors with fixed beds of catalyst particles contacted by either cocurrent downflow (Trickle-Bed Reactors) or cocurrent upflow (Packed Bed Column) of gas and liquid, are widely used in petroleum, petrochemical and chemical industries, environmental, biochemical and electrochemical processing, etc In many cases the gaseous reactant is sparingly soluble in the liquid phas...

A novel plasma-driven catalysis (PDC) reactor with special structure was proposed to remove vehicle exhaust gas. The PDC reactor which consisted of three quartz tubes and two copper electrodes was a coaxial dielectric barrier discharge (DBD) reactor. The inner and outer electrodes firmly surrounded the outer surface of the corresponding dielectric barrier layer in a spiral way, respectively. Na...

The paper presents a control system design oriented analysis of a semi-batch reactor used for tanning waste recovery. The analysis is performed with the help of modelling and simulation means and provides useful information for optimal control design of the process. INTRODUCTION The tannery is an essential industry process today. Its product is a natural hide. Some of the leather properties (su...

in this paper, startup performance of upflow anaerobic hybrid reactor and upflow anaerobic sludge blanket reactors in anaerobic treatment of distillery spentwash has been studied under identical conditions of operation. various effluent characteristics like ph, electrical conductivity, chemical oxygen demand, biochemical oxygen demand and total solids and other process parameters like biogas pr...

Title of Document: MULTIPLEXED CHEMICAL SENSING AND THIN FILM METROLOGY IN PROGRAMMABLE CVD PROCESS. Yuhong Cai, Doctor of Philosophy, 2005 Directed By: Professor Gary W. Rubloff, Department of Materials Science and Engineering and the Institute for Systems Research Mass spectrometry (mass spec) has proven valuable in understanding and controlling chemical processes used in semiconductor fabric...

The neutron eccmomy of a fast reactor is not so significantly affected by neutron capture in the structural materials in the core as is that of a thermal reactor. First, most neutron-capture cross sections increase with de­ creasing neutron energy, and the neutron population of the liquid-metal fast breeder reactor (Lhl FI~R) contains a far lower percentage of thermal neutrons than does that (I...

This study addresses the development of a compact reactor for oxidative steam-reforming of methanol (OSRM) to produce hydrogen in autothermal mode for fuel cells. The string reactor uses catalytically active brass wires with a diameter of 500 mm placed in parallel into a tube. The micro-channels in the reactor for gases are formed between the wires presenting hydrodynamics similar to the one in...

This work deals with using a method of artificial intelligence, namely the evolutionary algorithm SOMA, for static optimization of a chemical batch reactor, for the purpose to improve its behavior in uncontrolled state and predictive control. The importance of this problem is increasing with growing demand for special products made in batch reactors. The optimizations has been performed in seve...