نتایج جستجو برای: co2 foam
تعداد نتایج: 85572 فیلتر نتایج به سال:
With the increased popularity of foam rolling as a means of recovery, it is important to establish the exact manner in which the practice is useful. The purpose of this study was to examine the impact of foam rolling on recovery between two 800 m runs. Sixteen trained males (mean ± sd; age, 20.5 ± .5 yr; average 800 m treadmill run time, 145.2 ± 1.8 s) participated in the study, using a randomi...
A series of high-capacity, amine impregnated sorbents based on a cost-effective silica foam with ultralarge mesopores is reported. The sorbents exhibit fast CO2 capture kinetics, high adsorption capacity (of up to 5.8 mmol g 1 under 1 atm of dry CO2), as well as good stability over multiple adsorption– desorption cycles. A simple theoretical analysis is provided relating the support structure t...
Despite the increasing interest in CO2 foam flooding for enhanced oil recovery applications, it is challenging to have a successful field operation as the performance of the surfactant is often affected by the presence of crude oil and salinity of the water. It is also challenging to dispose of huge amounts of water associated with the field operation. Due to the incompatibility of the produced...
This paper describes a technique for achieving a compact aqueous spray that incorporates CO2 into the spray at low temperatures (T < 10 °C) and high pressures (P > 10 MPa). A high-pressure spray apparatus was used to explore the effects of temperature (4-25 °C), nominal CO2 mole fraction (0-0.12), in-line filter pore size (0.5-7 μm), and additives on the high-pressure (12-19 MPa) water spray pa...
Electrically conductive polycarbonate foams containing a low concentration of graphene nanoplatelets (0.5 wt.%) were produced with variable range of expansion ratio by applying a high pressure batch foaming process using sc-CO2. The structure of the foams was assessed by means of SEM, AFM and WAXS, and the electrical conductivity was measured in the foam growing direction. Results showed that e...
The functionality of casein that was precipitated by batch by a novel process using CO2 was investigated for solubility in water and NaCl, foam stability, overrun, emulsion activity index, and emulsion stability. These properties were compared with those of acidified casein and Na caseinate prepared in the laboratory, commercial acid casein, and commercial Na caseinate and Ca caseinates. The pH...
The expansion product from the sulfuric acid dehydration of para-nitroaniline has been characterized and studied for CO2 adsorption. The X-ray photoelectron spectroscopy (XPS) characterization of the foam indicates that both N and S contents (15 and 9 wt%, respectively) are comparable to those separately reported for nitrogenor sulfur-containing porous carbon materials. The analysis of the XPS ...
The manufacture of biopolymers foams with poly-lactic acid (PLA) and thermoplastic starch (TPS) using the green process of extrusion assisted by supercritical CO2 is a promising way towards new applications. A parametric study evidenced that the porosity is strongly correlated with the die temperature, CO2 content and TPS load. To get a high porosity, die temperature has to be diminished to blo...
This paper focuses on combining resistivity and pressure measurements to determine the effectiveness of foam as a mobility control method. It presents theoretical framework describe expected changes during CO2-foam displacements. With this objective, we first provide equations estimate for systems then utilize two distinct models quantify these effects. Using analytical solutions based fraction...
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