Bubble column (BC) or slurry bubble column (SBC) reactor has emerged as one of the most promising devices in chemical, biochemical and environmental engineering operations because of its simple construction, isothermal conditions, high heat and mass transfer rates, and on-line catalyst addition and withdrawal. The present work has been carried out to characterize the dynamics of three-phase flo...

Plug flow in microcapillaries or microchannels offers significant advantages for the development of microfluidic applications and recently triggers many interests and studies. Recirculation is formed within liquid plugs due to the presence of interfaces. This paper presents an analytical model to investigate the recirculation flow and the flow resistance in microcapillaries with circular cross ...

The oxidation kinetics for products of fast pyrolysis at low temperatures (<600 °C) are not well-known. These will be important in an effort to model autothermal pyrolysis, which has been recently developed intensify the process but occurs much lower than combustion. This study determines global rates 400–600 °C three pyrolysis: levoglucosan, xylose, and acetic acid. Experiments were performed ...

This paper proposes a thermodynamical pseudo Hamiltonian formulation of Continuous Stirred Tank Reactor model in which takes place some chemical reaction. This is done both in the isothermal and non isothermal cases. It is shown that the Gibbs free energy and the opposite of entropy can be chosen as Hamiltonian function respectively. For the non isothermal case, the so called Interconnection an...

abstract the goal of this research is simulating an optimum reactor to eliminate greenhouse gases, mainly co2, through combined cycle in stacks of power plant, using a strong base (sodium hydroxide) thinned by water. during this process sodium bicarbonate salt is generated together with water and the produced salty water is desalinated and its useful salts are also extracted. four scenarios hav...

In this study, the modeling of low-temperature catalytic abatement NOX and N2O from tail gases in a weak nitric acid plant utilizing single-pressure 0.716 MPa system was performed. A one-reactor concept assumes that first bed, is reduced by ammonia on commercial vanadia–alumina catalyst, second decomposed proprietary nickel–cobalt catalyst. The kinetics decomposition Cs/Ni0.1Co2.9O4 catalyst ex...

The thermal deactivation of TEM-1 β-lactamase was examined using two experimental techniques: a series of isothermal batch assays and a single, continuous, non-isothermal assay in an enzyme membrane reactor (EMR). The isothermal batch-mode technique was coupled with the three-state "Equilibrium Model" of enzyme deactivation, while the results of the EMR experiment were fitted to a four-state "m...

This contribution aims at emphasizing the importance of ideal reactors in field environmental engineering and education corresponding engineers. The exposition presents mass flow governing equations (batch, completely mixed flow, plug reactors) as particular cases derived from integral version conservation a chemical/biological species. In case transient problems simple kinetics, such expressio...

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...

A mesophilic anaerobic digestion reactor fed with maize straw was investigated in a plug flow for 150 days. The process performance evaluated through the stable, unstable, and recovery stages. Results obtained this study showed that maintained stable within approximately two months, but gradual depletion of trace elements (Fe, Co Ni) significant accumulation volatile fatty acids (8.07 g/L) occu...