Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 25 for “"Selective adsorption"”.
-
Separation of n-paraffins by selective adsorption
… Due to the shortage of information on the adsorption of multicomponent systems in the open literature, the present investigation was initiated to study the effect of feed flowrate, temperature, and zeolite particle size on the height of mass transfer zone (MTZ) and the dynamic capacity of …
-
Desing of selective adsorption materials for the remova lof hazardous organic compounds
Tesis con mención internacional y por compendio de publicaciones
-
SELECTIVE ADSORPTION OF DIBENZOTHIOPHENES ON ACTIVATED CARBONS WITH METAL SPECIES DEPOSITED ON THEIR SURFACES
"The objective of this thesis is an investigation of influence of porosity, surface chemistry, material composition and effects of metals oncarbon adsorbents in desulfurization of liquid fuels. Materials are derived from poly (4-styrenesulfonic acid-co-maleic acid) salts (sodium or transition …
-
Synthesis and characterization of membrane with molecularly imprinted polymers for selective adsorption of triclosan
Submitted in fulfillment of the requirement for the degree Master of Applied Sciences in Chemistry, Durban University of Technology, Durban, South Africa, 2019.
-
Modification of Milk Fat Globule Membrane Composition by Selective Adsorption and Its Effect in Functionality
… properties of the creams could be obtained by selective interaction of the silicates with some of the cream components. The modified creams were successfully used in the manufacture of low-fat dairy spreads and their textural and rheological properties demonstrated that treatment with the …
-
INVESTIGATION OF CHELATING DYE IMPREGNATED RESINS FOR THE SELECTIVE ADSORPTION AND SEPARATION OF TRACE METALS FROM AQUEOUS SOLUTIONS
… dyes by either covalent bonding or physical adsorption respectively. Large particle size polystyrene resins were used for preliminary investigations of dye loading and metal retaining capacities. After crushing resins to an intermediate particle size, capacity factors (k' values) and metal …
-
Nucleic base-directed adsorption of colloids and polyelectrolytes
… of this work has been the advancement of selective adsorption techniques by use of new interactions and development of new approaches to the directed assembly of colloidal species. The ability to control the assembly from solution of complex and composite surface arrays by chemical …
-
Adsorption of binary vapor mixtures into solids
The adsorption isotherms for ethanol-cyclohexane, ethanol-benzene, and benzene-cyclohexane vapor mixtures on Cab-O-Sil and on Graphon at 20, 30, and 40°C were measured at constant total pressure. The adsorption isotherms for the pure components were also obtained. The ethanol/Graphon isotherms were …
-
A multiscale theory to determine thermodynamic properties of confined fluids
… properties, such as density profiles, adsorption, local pressure tensor, surface tension, and solva- tion force of confined fluids as compared to the MD simulation results. Next, we extend the EQT-cDFT approach to confined fluid mixtures and demonstrate it by simulating a mixture of …
-
Nanotemplate creation and self-assembly on the (111) surface of gold
… processes are successfully combined in achieving selective adsorption of CH 3SH on Co/Au(111) network--a prototype nanotechnology for directed self-assembly of molecular elements on large, multifunctional templates with a nm size unit cell. The thermal evolution of Co/Au(111) system is …
-
The determination of heat transfer characteristics for the improved design of a heat exchanger for a moving bed system composed of air and activated carbon
… to the gaseous flow. The gases are separated by selective adsorption. Of basic importance for successful operation is the heating of the adsorbent to obtain desorption. Considerable difficulty in achieving this transfer of heat is encountered because of the non-conducting nature of the adsorbent. …
-
Periodic Mesoporous Organosilica: Preparation Characterization and Applications of Novel Materials
… as chromatography, chiral catalysis, sensing or selective adsorption. Periodic mesoporous organosilicas (PMOs) represent an interesting class of hybrid silica materials because of the wide variety of bridging organic groups which can be incorporated within the precursors [(OR)3Si-R-Si(OR)3] …
-
Speciation of inorganic aluminum solutions and modeling their kinetics and mechanisms of adsorption on selected solids
Kinetics and mechanisms of Al adsorption on Ca-saturated kaolinite, montmorillonite, and peat were studied using miscible displacement methods. Unneutralized and partially neutralized Al solutions (OH/Al=1.0) were leached through monomineralic columns and effluent analyzed for monomeric and …
-
Fabrication and Characterization of Electrical Contacts for Charge Transport Study in Molecular Electronics.
… with the single molecule conduction. The selective adsorption of SAM on Au plates by means of electron supply is proposed to develop the pliable manipulation of self-assembling molecular elementary devices. The method is applied to the two metal patterns, which is an electrical test-bed …
-
Silica Nanoparticle-Based Platform for Rare Earth Element Recovery and Separation
… motivate the development of sustainable, selective, and scalable REE separations. Nanostructured materials, such as those incorporating silica nanoparticles (SiO2 NPs), are promising materials to incorporate into REE separations due to their high surface area, tunable surface chemistry and …
-
Fabrication of nanostructured surfaces with well-defined chemistry using particle lithography
… for electroless deposition of iron oxide and selective adsorption of gold nanoparticles. New imaging strategies using atomic force microscopy (AFM) were developed for mapping magnetic domains and elastic compliance at size regimes below 100 nm. The AFM-based imaging mode is referred to as …
-
Sorption, Transport and Gas Separation Properties of Zn-Based Metal Organic Frameworks (MOFs) and their Application in CO₂ Capture
Adsorption, separation and conversion of CO₂ from industrial processes are among the priorities of the scientific community aimed at mitigating the effects of greenhouse gases on the environment. One of the main focuses is the capture of CO₂ at stationary point sources from fossil fuel emissions …
-
Development of adsorbent materials for phosphate recovery
… synthesis of adsorbent materials for phosphate selective adsorption, its recovery through multiple adsorption and desorption cycles, followed by its reuse for fertilizer production. Overall, this thesis demonstrates the efficient recovery and reusability of phosphate from aqueous solutions with …
-
Catalyst immobilization techniques for continuous flow synthesis
… to the salen catalyst. Use of continuous flow selective adsorption reactors to enhance catalytic processes is presented. Continuous feeds of a homogeneous catalyst into a sorbent where the catalyst displays an affinity for the sorbent results in accumulation of the catalyst in the packed bed. …
-
Study of peptide-mineral interactions
… the aspect ratio of ZnO crystals formed via an adsorption-growth inhibition mechanism. However the addition of a GGGC-tag on GT-16 weakens the adsorption of GT-16 on the (10-10) face of ZnO crystals. This gave rise to selective adsorption of GT-16 on the (0002) face, with a greater reduction of …
Page 1 of 2