scholarly journals Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1475 ◽  
Author(s):  
Cláudio Regis dos Santos Lucas ◽  
Yanne Katiussy Pereira Gurgel Aum ◽  
Edson de Andrade Araújo ◽  
Tereza Neuma de Castro Dantas ◽  
Elayne Andrade Araújo ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Surface Tension ◽  
Porous Media ◽  
Droplet Diameter ◽  
Porous Matrix ◽  
Alcohol Ethoxylate ◽  
Rock Interaction ◽  
X Ray ◽  
Size Characteristic ◽  
Xylene Isomers

The subject of rock–fluid interaction is important in cases where flow through porous media is occurring. One special case is when the fluid reacts with the porous matrix. In this case, the mass transfer and reaction rate control the dissolution pattern. This article aimed to study the interaction between an acid nanoemulsion system and a carbonate porous media. Nanoemulsions were developed to retard the rock’s dissolution and to promote the formation of conductivity channels. Nanoemulsions were prepared using ALK100 (alkyl alcohol ethoxylate) and RNX110 (alkylphenol ethoxylate) (nonionic surfactants), sec-butanol (co-surfactant), xylene isomers (oil phase), and a solution of HCl (aqueous phase). The obtained systems were characterized in terms of surface tension, droplet diameter, and reactivity. X-ray fluorescence/diffraction (XRF/XRD) and X-ray microtomography (microCT) were performed on carbonate porous media samples treated with the acid systems in order to observe the effects of the fluid–rock interaction. The results showed that the acid nanoemulsion, presenting a low oil content formulation, showed the low surface tension and droplet size characteristic of nanoemulsions. It was experimentally verified that the reactivity in the nanoemulsion media was mass-transfer-retarded, and that the wormhole pattern was verified under the studied conditions.

scholarly journals Pore-scale Mass Transfer Experiments in Porous Media by X-ray CT Scanning

2017 ◽  
Vol 105 ◽  
pp. 5079-5084
Author(s):  
Bohao Wu ◽  
Lanlan Jiang ◽  
Yu Liu ◽  
Pengfei Lv ◽  
Dayong Wang ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Ct Scanning ◽  
Pore Scale ◽  
X Ray

Combined Heat and Mass Transfer in Porous Media Heat Exchanger

2002 ◽  
Author(s):  
Adriana M. Druma ◽  
Khairul M. Alam
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Heat Exchanger ◽  
Heat And Mass Transfer ◽  
Energy Recovery ◽  
Low Cost ◽  
Porous Matrix ◽  
Air Stream ◽  
The Matrix ◽  
Heat And Moisture

A numerical and experimental study of heat and mass transfer has been carried out for an energy recovery ventilator with a porous media heat exchanger. The energy recovery ventilator selected for this study has a rotary periodic heat exchanger that can transfer heat and moisture from one air stream to another. Such heat exchangers can be operated with high effectiveness by using a low-cost porous matrix as the heat exchanger medium. The influence of porosity in the matrix has been studied numerically and the performance of the energy recovery ventilator in recovering both heat and moisture has been modeled.

Assessment of the limiting step of mass transfer in n-hexadecane biodegradation in a bubble column reactor

2010 ◽  
Vol 62 (4) ◽  
pp. 906-914 ◽  
Author(s):  
Guillermo Quijano ◽  
Sergio Huerta-Ochoa ◽  
Mariano Gutiérrez-Rojas
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Mass Transfer ◽  
Surface Tension ◽  
Aqueous Phase ◽  
Oxygen Transfer ◽  
Bubble Column ◽  
Droplet Diameter ◽  
Bubble Column Reactor ◽  
Limiting Step

A mathematical model was developed to assess limiting step of mass transfer in the n-hexadecane (HXD) biodegradation by a microbial consortium. A double Monod kinetic (oxygen and HXD) for biomass production was successfully used to describe the experimental data. Good fitting (r2 = 0.92) between the model solution and experimental data was obtained. The overall mass transfer coefficients for HXD, kLaHXD, and oxygen, kLaO2, were experimentally determined and biosurfactant production was indirectly determined through surface tension measurements in the aqueous phase. It was observed that a surface tension reduction from 65 (0 h of culture) to 47 mN m−1 (240 h of culture) was related to a decrease of 52% in the HXD droplet diameter and to an increase of 63% in kLaHXD, respect the initial values. Conversely, kLaO2 was repressed up to 37% compared to the initial value. The maximum rate analysis based on the mathematical model showed that HXD transfer was up to 5-fold lower than its consumption. On the contrary, oxygen transfer was always higher than its consumption. Thus, the limiting step under the working conditions was the HXD transfer to the aqueous phase. However, slight reductions in kLaO2 could result in oxygen transfer limitations during the last 60 h of the cultures.

Experimental Study of Natural Convective Mass Transfer from Downward Pointing Conical Surfaces in Porous Media

2007 ◽  
Vol 10 (3) ◽  
pp. 277-286 ◽  
Author(s):  
Martin J. Garland ◽  
S. U. Rahman ◽  
K. A. Mahgoub ◽  
Ahmad Nafees
Keyword(s):  
Mass Transfer ◽  
Experimental Study ◽  
Porous Media ◽  
Convective Mass Transfer ◽  
Conical Surfaces

HEAT AND MASS TRANSFER IN REACTIVE POROUS MEDIA WITH LOCAL NONEQUILIBRIUM CONDITIONS

2012 ◽  
Vol 15 (4) ◽  
pp. 329-341 ◽  
Author(s):  
A. Bousri ◽  
Khedidja Bouhadef ◽  
H. Beji ◽  
Rachid Bennacer ◽  
R. Nebbali
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Heat And Mass Transfer ◽  
Nonequilibrium Conditions
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