Results 11 to 20 of about 122,499 (296)

Surfactant Adsorption Isotherms: A Review [PDF]

open access: yesACS Omega, 2021
The need to minimize surfactant adsorption on rock surfaces has been a challenge for surfactant-based, chemical-enhanced oil recovery (cEOR) techniques. Modeling of adsorption experimental data is very useful in estimating the extent of adsorption and, hence, optimizing the process.
Shams Kalam   +3 more
doaj   +5 more sources

Use of Microfluidic Capillary Electrophoresis for the Determination of Multi-Component Protein Adsorption Isotherms: Application to High-Throughput Analysis for Hydrophobic Interaction Chromatography [PDF]

open access: yesPharmaceutics, 2021
Chromatography is a widely used separation process for purification of biopharmaceuticals that is able to obtain high purities and concentrations. The phenomena that occur during separation, mass transfer and adsorption are quite complex.
Elena Lietta   +5 more
doaj   +2 more sources

Surface areas and adsorption energies of biochars estimated from nitrogen and water vapour adsorption isotherms [PDF]

open access: yesScientific Reports
Nitrogen adsorption isotherms, along with the BET model for interpretation, are recommended for estimating biochar surface area. The frequently measured small surface areas of biochars contrast with their high sorption and cation exchange capacities.
Kamil Skic   +5 more
doaj   +2 more sources

Investigation of isotherms of differential heat-entropy adsorption of carbonyl sulfide in CaA zeolite during gas purification [PDF]

open access: yesE3S Web of Conferences, 2023
The task of this research cycle was to measure adsorption isotherms (а) in the temperature range from 273 to 373 K, based on isotherms measured at different temperatures, to calculate isosteric heats (Qd) and entropies (∆Sd) of adsorption in order to ...
Mamadjonova Mohfora, Olimjon Nuridinov
doaj   +1 more source

Isotherms of differential heat and entropy adsorption of carbonyl sulfide in zeolite NaX when cleaning gases [PDF]

open access: yesE3S Web of Conferences, 2023
The task of this research cycle was to measure adsorption isotherms (а) in the temperature range from 273 to 373 K, based on isotherms measured at different temperatures, to calculate isosteric heats (Qd) and entropies (∆Sd) of adsorption in order to ...
Ergashev Oybek, Nuridinov Olimjon
doaj   +1 more source

Release of proteins via ion exchange from albumin-heparin microspheres [PDF]

open access: yes, 1992
Albumin-heparin and albumin microspheres were prepared as ion exchange gels for the controlled release of positively charged polypeptides and proteins.
Bae, You Han   +5 more
core   +17 more sources

Mathematical modeling of adsorption isotherms of water vapour on polymeric ionites used in agrochemical practice [PDF]

open access: yesE3S Web of Conferences, 2023
Polymeric ion-exchange materials (ionites) are used in agriculture to make substrates for complete and long-term plant nutrition. The main nutrients in bound form are contained on the ion-exchange groups of the ionite. The degree of dissociation of these
Ivanov I.V., Ivanova O.K.
doaj   +1 more source

Adsorption of water on the fine fractions of Finnish tills [PDF]

open access: yesBulletin of the Geological Society of Finland, 1986
This study deals with adsorption of water from the vapour phase on till samples at 25°C. The dry weights were determined after drying the samples in an oven at 105°C.
A. Kellomäki, P. Nieminen
doaj   +1 more source

Adsorption of binary hydrocarbon gas mixtures on activated carbon: Theoretical prediction of the binary equilibrium data

open access: yesEnergy Reports, 2020
Experimental binary equilibrium data for the adsorption of hydrocarbon mixtures on activated carbon at given temperature are presented and discussed. Pure-component adsorption isotherms were fitted by using Langmuir model.
Sang Chul Jung   +2 more
doaj   +1 more source

Modelling Methane Adsorption Isotherms on Shale at Different Temperatures

open access: yesAtmosphere, 2022
Prediction of adsorption isotherms under different temperatures is significant to reserve estimation of shale gas reservoirs. Based on the Polanyi adsorption potential theory and Langmuir adsorption theory, a method was presented to predict adsorption ...
Dongqing Zhang
doaj   +1 more source

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