31 documents found, page 1 of 4

Intensified bioprocess for the anaerobic conversion of syngas to biofuels

Syngas, composed mainly of CO, H2 and CO2 can be produced from several sources, including coal, oil and natural gas, tar sands, recalcitrant wastes and biomass. Syngas can be a potential feedstock for the sustainable production of biofuels and bulk chemicals. The selective biological conversion of syngas is a possible alternative to the chemical route. Nevertheless the biological route remains rather unexplored...

Intensified bioprocess for the anaerobic conversion of syngas to biofuels

Liquid backmixing in oscillatory flow through a periodically constricted meso-tube

This paper deals with the measurement and modelling of axial liquid dispersion in a 4.5 mm internal diameter tube provided with smooth-periodic constrictions (meso-tube) in steady and oscillatory flow conditions. The residence time distribution (RTD) in the meso-tube was monitored for a range of fluid oscillation frequency (f) and amplitude (x0) at laminar flow. The RTD response was modelled with three hydrodyn...

Process intensification using a meso-scale oscillatory flow reactor

Meso-technologies are currently triggering a paradigm change in the design of chemical and biochemical processes. Mass and heat transfer rates can readily be maximised in smaller, sustainable, cheaper and safer plants, whilst virtually reducing the design of (bio) process unit operations to the intrinsic kinetics of the system. A novel meso-scale reactor running with oscillatory flow mixing was recently develop...

Microalgae as a source of starch

For millennia, aquatic environments have been a source of food, minerals and natural products. Concomitant to the increase in human population and its needs, there is an urge for the discovery and sustainable development of new resources. Among aquatic microorganisms, microalgae are a very interesting source of a wide range of compounds. Photosynthetic microalgae are microorganisms that can convert solar energy...

Powering process intensification in an oscillatory flow meso-reactor

Enhanced gas-liquid mass transfer of an oscillatory constricted-tubular reactor

The mass transfer performance has been tested for gas-liquid flow in a new tubular reactor system, the oscillating mesotube (OMT), which features the oscillatory movement of fluid across a series of smooth constrictions located periodically along the vertical 4.4 mm internal diameter tube. The effect of the fluid oscillations (frequency,f, and center-to-peak amplitude, x(0), in the range of 0-20 s(-1) and 0-3 m...

The bubble size distribution and O2 mass transfer in an oscillating, meso-scale...

This work aims at characterizing bubble size distribution and its control in a small-scale, constricted tube in the presence of an oscillating flow. From previous works, it became clear that the full modelling of the dispersed gas -liquid flow in the constricted tube requires a deeper clarification of the impact of tube geometry and the hydrodynamic parameters on the observed values of the oxygen mass transfer ...

The intensification of gas–liquid flows with a periodic, constricted oscillator...

The experimental study of gas dispersion in a vertical periodically, constricted, oscillatory meso-tube (OMT) is herein presented. Water was continuously pumped through the OMT in the laminar flow regime along with an oscillatory flow component superimposed into the net flow in a range of fluid oscillation frequency (f) and centre-to-peak amplitude (x0) of and 0–3 mm, respectively, in the presence of a very low...

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