For establishing hydrate-based technologies for natural-gas storage/transport, CO2 capture from industrial flue gases, etc., we need appropriate guidelines for the scale-up of hydrate production/processing equipment from laboratory scales to industrial scales. This paper aims to provide technical remarks on the scale-up of hydrate-forming reactors, the central components of hydrate production/p...

Anaerobic treatment is applied extensively of removal of organic pollutants (COD) from wastewater. It is more competitive than aerobic treatment in applications where the quantity of COD to be removed is large. The major fraction of COD is converted to useful methane gas, and only a small fraction becomes waste sludge. The COD loading rate of anaerobic reactors is higher than that of aerobic re...

Almost all available literature correlations to predict the volumetric gas /liquid mass transfer coefficient, kLa in agitated reactors are systemsor operating conditions-dependent. In this study, two back-propagation neural networks (BPNNs), one dimensional and one dimensionless were developed to correlate kLa for numerous gas /liquid systems in both surface-aeration reactors (SAR) and gas-indu...

The formation of acetate by Acetobacterium woodii was studied systematically in batch-operated stirred-tank reactors at different hydrogen and carbon dioxide partial pressures in the gas phase. 48 parallel stirred-tank reactors on a millilitre-scale as well as stirred-tank reactors on a litre-scale were applied for the detailed reaction engineering analysis of hydrogenotrophic acetate formation...

Conventional airlift contactor (UT-ALC) was modified to improve its performance. The modified system (CDT-ALC) was tested for gas hold-up characteristics. Hydrodynamic environment depends on gas hold-up. New system reported 50 % higher gas hold-up. Linear relation between superficial gas velocity and fractional gas hold-up were developed from experimental data for both the reactors.

This report describes our efforts of a one-year, exploratory study on the physics necessary to advance the development of a low power, small scale, air separation unit (ASU) based on non-equilibrium plasma discharges (PD-ASU). Our research focus is aimed at i) preliminarily design and selection of the test geometry of the air passage, plasma electrodes and discharge type, ii) constructing a pro...

The pulsed detonation (PD) gun technology was applied for the autothermal high-temperature conversion of natural gas and atmospheric-pressure oxygen-free allothermal gasification liquid/solid organic wastes by detonation-born ultra-superheated steam (USS) using two flow reactors essentially different volume: 100 40 dm3. Liquid solid were waste machine oil wood sawdust, with moisture ranging fro...

This work presents a brief introduction on the basics of fiber-optical sensors and an overview focused on the applications to measurements in multiphase reactors. The most commonly principle utilized is laser back scattering, which is also the foundation for almost all current probes used in multiphase reactors. The fiber-optical probe techniques in two-phase reactors are more developed than th...