A systematic approach for on-the-fly mechanism reduction is proposed in this paper. The approach consists of element flux analysis and dynamic generation of reduced mechanisms during reactive flow computation. At each time step of the computation, a reduced mechanism is generated based on local conditions and no previous information or analysis is necessary. The approach is demonstrated in a pl...

Calculations of total reactor size have been made for the over bed combustion region of an incinerator, for a given area firing rate, assuming a variation in the completeness of reaction (conversion) "in the stirred section. As conversion increases, the overall reactor size drops to a minimum at 85 percen t con­ version and then rises again. At this minimum, the overbed heigh t required was cal...

A CSTR is an Continuously Stirred Tank Reactor with the main function of agitation and to achieve constant composition. It has an important role in chemical process plants. A CSTR has an higher degree of nonlinearity when compared with other chemical reactors, this is mainly due to the temperature variations that occur because of uncertainity in feed. Hence, temperature control is a strenuous t...

This paper introduces a robust strategy for stabilizing complex industrial processes exemplified by a complex chemical reactor. The design uses a combination of backstepping methods and Lyapunov-based techniques for implementing a robust feedback controller. A model-reference-like virtual system is proposed to accomplish both asymptotic stability and satisfactory transient performance. The cont...

The research investigated the production of Biohythane in a two-phase anaerobic digestion process treating food waste as substrate. Preliminary batch assays were carried out at initial organic loadings of 15, 20, 25 and 30 kg TVS m -3 , in stirred 1.5-l reactors at 55 °C. The results showed all hydrogen was produced within the first 24 hours after feeding and the highest load tested gave the ma...

This paper offers an H-infinity (H∞) controller-based disturbance rejection along with the utilization of water wave optimization (WWO) algorithm. H∞ controller is used to synthesize guaranteed performance certain applications as well it provides maximum gain at any situation. The proposed work focuses on conflicts continuous stirred-tank reactor (CSTR) such variation in temperature and product...

Increasingly, there are severe environmental controls in the mining industry. Because of lack of technological advances, waste management practices are severely limited. Most of the wastes in the milling industrial effluents are known to contain cyanides and it is recognized that after extraction and recovery of precious metals, substantial amounts of cyanide are delivered to tailings ponds. Th...

A method for the prediction of the interactions within complex reaction networks from experimentally measured time series of the concentration of the species composing the system has been tested experimentally on the first few steps of the glycolytic pathway. The reconstituted reaction system, containing eight enzymes and 14 metabolic intermediates, was kept away from equilibrium in a continuou...

A multivariable nonlinear control strategy which accounts for unmeasured state variables and input constraints is developed for the free-radical polymerization of methyl methacrylate in a continuous stirred tank reactor. Monomer concentration and reactor temperature are controlled using a technique which combines nonlinear input–output decoupling and linear model predictive control. Input const...

In this paper, we present an adaptive extremum seeking control scheme for nonisothermal continuous stirred tank reactors subject to reactor temperature constraints. Only limited knowledge of the reaction kinetics is assumed with no direct measurement of the reaction mixture composition. An adaptive learning technique is introduced to construct an optimum seeking algorithm that drives the system...