The Imperfectly Stirred Reactor (ISR) is a model for strongly recirculating reacting flows where the conditional means of the reactive scalars are assumed to be spatially uniform and statistically stationary. This model is based on the Conditional Moment Closure (CMC) method and involves very simplified equations which can be solved at very little computational cost. The governing parameters in these equations are the averaged probability density functions (pdf), the residence time and the chemical mechanism.
Continuous stirred tank reactor is a typical chemical reactor with complex non linear dynamic characteristics. There has been considerable interest in its state estimation and real time control based on mathematical modeling. However, the lack of understanding of the dynamics of the process, the highly sensitive and non linear behavior of the reactor, has made it difficult to develop the precise mathematical modeling of the system. Efficient control of the product concentration in CSTR can be achieved only through accurate model. Here attempts are made to ease the modeling difficulties using AI techniques such as Fuzzy logic. Simulation results demonstrate the effectiveness of Fuzzy logic control technique. The system is a stirred tank reactor with two flows of liquid enter the system and another flow exits the tank with the formation of product. Simulink was employed to design a model for this system in the simulation environment. This work is aimed for utilization by researchers, industrialists’ and students. Furthermore it will be especially relevant and useful for the students of Electrical Engg. and Chemical Engg. for carrying out research in the area of simulation of CSTR.
This study aims to present the results obtained from the simulation of a flat plate photocatalytic reactor using CFD code FLUENT. For various turbulence models, the simulation results showed the computed flow features for inlet and outlet components of the flat plate reactor under different flow regimes.In addition the performance of the photocatalytic reactor for pollutant degradation was observed to depend on the reactor’s hydrodynamics. The results reported here suggest the importance of fluid mixing in the flat plate reactor since the reaction takes place only at the fluid-catalyst interface.The effect of inlet positions and roughness elements on the flow and mass transport of formic acid in the reactive module has been examined which provides significant insight for the efficient design of the flat plate reactor.
Reactive dyes have been identified as problematic compounds in wastewater from textile industries as they are water soluble and cannot be easily removed by conventional aerobic biological treatment systems. The bioflocculant is effective in flocculating a kind of reactive soluble dye (Cibacron yellow FN_2R) in aqueous solution. A bioflocculant–producing bacterium was isolated from wastewater and sediments of Close Drainage Systems (CDS) located at the Prai area of Penang, Malaysia. The treat-ability of a reactive dye (Cibacron yellow FN_2R) by sequencing batch reactor and the influence of the dye on concentration on system performance were investigated in this study. Employing reactive dye by Sphingomonas paucimobilis bacteria at sequence batch reactor is a novel approach of dye removal. The book shows a bioflocculant produced by Sphingomonas paucimobilis was effective for the reduction of dye (Cibacron Yellow FN-2R).
As companies, industries and societies acknowledge sustainable development as a more rational paradigm than unconstrained growth; frameworks and tools are being developed and applied to perform the shift from the “throughput” economy towards a “circular” economy. This research proposes a model/tool for rapid assessment of regional material flow management potentials, in terms of optimisation possibilities of regional material and energy flows and stocks, with emphasis on associated Green House Gas emissions. Users of the model would be academic, research, planning, and management entities devoted to assess and streamline regional material and energy flows.