Thesis (Ph. D.)--University of Queensland, 2001. / Includes bibliographical references.

No description available.

No description available.

Thesis (Ph. D.)--University of Minnesota, 1918.

Thesis (Ph. D.)--University of Chicago, 1920. / "Private edition, distributed by the University of Chicago libraries."

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 85-91).

Th.--Sci. phys.--Grenoble 1, 1985.

Single-walled dahlia-like carbon nanohorns treated with H2O2 for 3hrs at 150 ℃ were used as sorbent in a study of CO2 adsorption. This treatment ensures that the nanohorns are open and they have their interior space available for adsorption. Volumetric adsorption measurements on open spherical aggregates of dahlia-like single walled carbon nanohorns were performed at seven different temperatures between 158.66 K and 208.68 K. The waiting time for reaching the equilibrium pressure after adding a dose increased with sorbent loading. Unlike Ne and CF4 adsorption isotherms measured on similar substrate which have two distinct substeps present in the isotherms, the adsorption data for CO2 has a single very broad step present between the lowest coverage and saturation. Results for the loading dependence of the isosteric heat indicate that this quantity depends non-monotonically on the amount of CO2 adsorbed. The effective specific surface area of the open single walled carbon nanohorns sample obtained in this study are compared with the ones obtained with other carbon nanohorn samples; the results clearly indicate that nanohorns are open.

The Polanyi Equilibrium Theory proposes that a characteristic curve exist which can, after the application of certain abscissa scale factors, describe the adsorption of all compounds on a given carbon. A study was undertaken, using published data from several sources on a variety of compounds and carbons to challenge the most fundamental aspects of the Polanyi Adsorption Equilibrium Theory. Its effectiveness as a predictive model was tested by constructing characteristic curves and comparing the observed isotherm data to the Polanyi predictions. The results support the existence of the characteristic curve. However, in several instances, experimental data was required to accurately determine the required scale factors. Data from several compounds indicates that these scale factors can be estimated from a single data point. A comparison of predicted to observed scale factors indicates that polarizability is effective in providing only an approximation of the true abscissa scale factors. An additional adjustment for adsorbate density is required to correct for the theorized inefficient packing of the solids in the carbon pores. However, after these empirically determined scale factors are applied, an accurate depiction of the data results.

[No abstract available] / Science, Faculty of / Chemistry, Department of / Graduate