The effect of employing four different reactor models, Zeldovich–von Neumann–Döring (ZND), constant volume (CV), pressure (CP), and the Shock routine from Chemkin, to perform detonation-relevant chemical modeling was assessed. simulation results were compared in terms characteristic length scales analyses with representative mixtures: $$\hbox {H}_{2}{-}\hbox {O}_{2}{-}\hbox {N}_{2}$$ , {NO}_{2}...

in this study, decolorization of the diazo dye, reactive black 5 (rb5) in a coprinus cinereus peroxidase-catalyzed reaction has been investigated. a bisubstate kinetic model for the reaction rate based on the ping-pong mechanism was assumed for the enzymatic decolorization. experimentswere conducted at different rb5 and hydrogen peroxideconcentrations in a batch mannerto estimate the intrinsic ...

This paper deals with a modeling environment for systematic chemical process design through a Computer-Aided Modeling System (CAMS), whose potential is highlighted through a case study. In particular, the capability of ICAS-MoT (an integrated modeling environment) to build, analyze, manipulate, solve and visualize mathematical models is shown. Our main interest is to use models for process desi...

The high silica Mn-substituted MFI metallosilicate catalyst with Si/Al molar ratio of 220 and Si/Mn molar ratio of 50 was successfully synthesized by hydrothermal method. The catalyst sample was appropriately characterized by XRD, FE-SEM, EDX and BET techniques. The Mn-substituted MFI metallosilicate has not been reported as the potential catalyst for the methanol to propylene (MTP) reaction. T...

This report discusses control of dissolved oxygen in a bioreactor where the oxygen supply is manipulated using the stirrer speed. In batch and fed-batch cultivations the operating conditions change significantly which may cause tuning problems. Analysis using a linearized process model shows that the process dynamics is mainly affected by changes in the volumetric oxygen transfer coefficient KL...

We discuss the impact of recent experimental results on the determination of atmospheric neutrino oscillation parameters. We use all published results on atmospheric neutrinos, including the preliminary large statistics data of Super-Kamiokande. We re–analyze the data in terms of both νμ → ντ and νμ → νe channels using new improved calculations of the atmospheric neutrino flux. We compare the s...

Introduction Corona discharges are discussed in this paper as one example of pulsed atmospheric discharges. Other configurations used are the dielectric barrier and the packed bed reactor. Here only the volume discharge will be discussed and not the surface discharge that also plays a role in these last two cases. The paper is divided in two parts. Fundamental processes that are important in co...

Due to the recent increase of natural gas production in the U.S., utilizing natural gas for higher-value chemicals has become imperative. Direct methane aromatization (DMA) is a promising process used to convert methane to benzene, but it is limited by low conversion of methane and rapid catalyst deactivation by coking. Past work has shown that membrane separation of the hydrogen produced in th...

This paper uses the operation of a pulp bleaching reactor as a platform for the illustration and discussion of several ideas involving use of the stationary probability density function in process control. A computer simulation of the partial differential equations, derived from first-principles, describing the bleaching reactor is used to represent the true process. Empirical, discrete-time mo...

Six advanced reactor concepts have been selected for Generation-IV reactors and are being investigated worldwide to meet the challenging goals of effective resource utilization and waste minimization (sustainability), improved safety, enhanced proliferation resistance, and reduced system cost. [1] The six systems are very high temperature reactor (VHTR), sodium-cooled fast reactor (SFR), superc...