An external liquid circulation is introduced into a traditional internal loop reactor in order to improve liquid circulation and increase the interface between gas and liquid phases. The effects of superficial gas velocity and external liquid circulation velocity on local and overall gas holdups are explored experimentally and numerically in the loop section of a combined gas-liquid contactor, ...

This paper presents a method of simple and multiple water fuel emulsions preparation in a liquid-liquid contactor with Couette-Taylor flow (CTF contactor). This method concerns the integration of the CTF contactor with diesel engines for the injection of just-prepared emulsions. Stable simple O/W and multiple O/W/O emulsions, both with quite narrow drop size distribution, have been prepared. Th...

Membrane gas–liquid contactors have been developed to reduce the capital cost and energy consumption of conventional CO2 absorption stripping columns. As a hybrid technology membrane separation amine absorption, these units can improve gas process by generating 400–1500% greater mass transfer area per unit volume leading smaller equipment sizes. Regeneration occur within contactor below boiling...

A tubular porous borosilicate membrane contactor was investigated for ozone gas/water mass transfer and the removal of contaminants emerging concern (CECs) in water. Ozone contact occurs on shell-side, which is coated with a photocatalyst (TiO2-P25), as gas stream fed from lumen side permeates through pores generating micro-sized bubbles uniformly delivered to annular reaction zone where contam...

The work studied the characteristics of membrane catalysts in reaction methane carbonate conversion as a model reaction. This process produces synthesis gas (a 1:1 mixture Н 2 and СО), which can be used to make many products, including synthetic fuels (in FischerTropsch process). One serious problems is presence side reactions that prevent production with required ratio products (H :CO=1:1).Mem...

In this work, 4-diethylamino-2-butanol (DEAB) as a new type of alkanolamine solvent is used for CO 2 capture in hollow fiber membrane contactor (HFMC). A model describing the gas and liquid reactions transport inside under wetting or non-wetting conditions was built. The countercurrent flow natural considered model. To investigate influence on decarburization efficiency, DEAB compared with othe...

Extraction of heavy metals in membrane contactors was investigated theoretically in this study. Extraction of Cu2+ with a kerosene solution of di(2-ethylhexyl) phosphoric acid (D2EHPA) was studied. Simulations were performed using computational fluid dynamics of mass and momentum transfer in all subdomains of a circular membrane contactor. The membrane contactor consists of three sections: lume...