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.
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Showing 1 to 7 of 7 for “"SURFACE-DIFFUSION COEFFICIENT"”.
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Humic Substances Removal by Activated Carbon
… adsorption capacity of activated carbon and the surface diffusion coefficient of humic substances inside the adsorbent particle. The surface diffusion coefficient was also correlated with the adsorption capacity. The higher the adsorption capacity, the lower the diffusion coefficient. Based on …
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Excitation-Induced Ge Quantum Dot Growth on Si(100)-2X1 by Pulsed Laser Deposition
… the excitation laser during growth decreases the surface roughness although epitaxial growth could not be achieved.</p> <p>We have also studied the surface diffusion coefficient of Ge during pulsed laser deposition of Ge on Si(100)-(2×1) with different excitation laser energy densities. Applying …
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Oxygen reduction on platinum : an EIS study
… that ORR is rate-limited jointly by two surface chemical processes, namely, sorption/dissociation of molecular O₂ into O[delta]- a over Pt, as well as surface diffusion. Further, the novel experimental design, in conjunction with streamlined analysis techniques, provides accurate surface …
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Effect of pH on adsorption and desorption equilibria and kinetics of 2-nitrophenol and phenol onto two activated carbons.
… both carbons were described by the homogeneous surface diffusion model and it was not necessary to utilize separate terms for slow and rapid adsorption mechanisms. Also, it was found that the surface diffusion coefficient, D$\rm\sb{s},$ within the HSSD model was essentially the same at all pHs. …
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MODEL-BASED TESTING AND EVALUATION OF SORPTION MEDIA FOR REMOVING VOLATILE ORGANIC COMPOUNDS IN INDOOR AIR
… A new mechanistic model named convective & diffusion mass transfer model with variable partition coefficient (C&DMT-VP) was proposed to simulate the performance of adsorption-based air cleaning devices under the typical indoor VOC concentrations. The applications of this model were …
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Mechanisms of competitive adsorption between trace organic contaminants and natural organic matter on activated carbon
… blocking of pore entrance which reduces diffusion rate of the target compounds, and covering of surface sites which may actually enhances diffusion rate of the target compounds. The objective of this dissertation study was to further elucidate the individual competitive effects, to …
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ΜΕΛΕΤΗ ΤΩΝ ΕΠΙΦΑΝΕΙΑΚΩΝ ΚΑΙ ΔΙΕΠΙΦΑΝΕΙΑΚΩΝ ΙΔΙΟΤΗΤΩΝ ΤΗΣ ΣΤΑΘΕΡΟΠΟΙΗΜΕΝΗΣ ΖΙΡΚΟΝΙΑΣ ΚΑΙ ΣΥΣΤΗΜΑΤΩΝ ΖΙΡΚΟΝΙΑΣ ΣΕ ΕΠΑΦΗ ΜΕ ΡΕΥΣΤΑ ΜΕΤΑΛΛΑ
… FOR THE MEASUREMENT OF CONTACT ANGLES, THE SURFACE AND GRAIN-BOUNDARY ENERGIES OF POLYCRYSTALLINE CUBIC ZRO2 IN THE TEMPERATURE RANGE OF 1173 TO 152 B.K. WERE DETERMINED. THE TEMPERATURE COEFFICIENTS OF THE LINEAR TEMPERATURE FUNCTION OBTAINED, ARE EXPRESSED AS DΓSV/DT=-0431X10- 3 Z.M-2 K-1 …