Notwithstanding the numerous studies in the last decades to prevent runaway reactions, the maintenance of stability in chemical reactors is still a current issue in industrial chemical plants. There is an urgent need to implement an efficient and robust algorithm capable of detecting in advance anomalous behaviours of the reactor temperature during exothermic processes, in order to take appropr...

The effects of sonication, potassium ferrate (K2FeO4) oxidation and their simultaneous combination (called “sono-oxidative pre-treatment”) on chemical properties and anaerobic digestion of waste activated sludge (WAS) were investigated and compared comprehensively. Based on chemical parameters, the optimum operating conditions were found to be 0.3 g K2FeO4/g total solids (TS) dosage for 2-h ind...

The past two decades have seen far-reaching progress in the development of microfluidic systems for use in the chemical and biological sciences. Here we assess the utility of microfluidic reactor technology as a tool in chemical synthesis in both academic research and industrial applications. We highlight the successes and failures of past research in the field and provide a catalogue of chemis...

We introduce a new type of pulse coupling between chemical oscillators. A constant inflow of inhibitor in one reactor is interrupted shortly after a time delay after a sharp spike of activity in the other reactor. We proved experimentally and theoretically that this reversed inhibitory coupling is analogous to excitatory coupling. We did this by analyzing phase response curves, dependences of d...

The first considered problem is the problem of arising dynamic dissipative structures in the chemical reactor volume. The mathematical model of heat and mass transfer in the tubular through-reactors has been submitted. The model consists of the diffusion-kinetic equations for two reagents under the first-order reversible reaction and heat transfer equation with allowance for the latent heat of ...

On the basis of the stochastic reactor model Partially Stirred Plug Flow Reactor (PaSPFR) a model is developed that accounts for soot and NOx formation in the distributed combustion regime. This is done by means of the joint composition probability density function (PDF). The composition vector consists of the species mass fraction in the gas phase, enthalpy, and four moments of the soot partic...

INTRODUCTION Thin films of different materials like metals, oxides, sulphides, etc., can be deposited by the Chemical Aerosol Deposition Technology (CADT). A liquid aerosol is used to transport the chemical reactants to the vicinity of a heated subslrate. Conditions are set to obtain an heterogeneous reaction (CVD mode) between the evaporated reactants and the substrate (Maatman et al. 1988). T...

Title of Dissertation: MODELING AND SIMULATION OF A TUNGSTEN CHEMICAL VAPOR DEPOSITION REACTOR Hsiao-Yung Chang, Doctor of Philosophy, 2000 Dissertation directed by: Assistant Professor Raymond A. Adomaitis Department of Chemical Engineering Chemical vapor deposition (CVD) processes are widely used in semiconductor device fabrication to deposit thin lms of electronic materials. Physically based...

In this paper, control of a non-isothermal continuous stirred tank reactor in which two parallel autocatalytic reactions take place has been addressed. The reactor shows chaotic behavior for a certain set of reactor parameters. In order to control the product concentration, an optimal state feedback controller has been designed. Since concentrations of reactor species are ...

In this study, a novel continuous reactor has been developed to produce high quality methyl esters (biodiesel) from palm oil. A microporous TiO2/Al2O3 membrane was packed with potassium hydroxide catalyst supported on palm shell activated carbon. The central composite design (CCD) of response surface methodology (RSM) was employed to investigate the effects of reaction temperature, catalyst amo...