Thesis (Ph. D.)--University of Wisconsin--Madison, 1980. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 161-165).

Thesis (M.S.)--University of Wisconsin--Madison, 1965. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 70-72.

Thesis--Wisconsin. / Includes bibliographical references (leaf 186).

Thesis (Ph. D.)--University of Oregon, 2005. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 102 - 112). Also available for download via the World Wide Web; free to University of Oregon users.

Many geochemical processes involve the reaction of an aqueous phase with minerals with which the aqueous phase is not in equilibrium. Prediction of the change in the composition and in the number of moles of phases and of aqueous species as the system proceeds toward overall equilibrium is made possible by differential equations formed from mass balance, mass action, ionic strength and activity of water equations. The equations developed by Helgeson, Brown, Nigrini and Jones (1970) have been examined and alternate forms of the differential equations which constrain reaction progress have been proposed. These new equations include correct terms for the change in the mass of water, the change in the activity of water and the change in the number of moles of each endmember of the solid solution phases. The equations have been formulated to allow a more efficient algorithm for numerical evaluation. General forms for all equations are presented. A FORTRAN program for the calculation of mass transfer in an isothermal and isobaric system and a description of the program are given. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

archives@tulane.edu / 1 / Xiao Li

No description available.

Several types of research are ongoing throughout the world, to discover economical and reliable techniques to create hydrogen, and propagate the vision of a hydrogen economy. This research examines a COMSOL Multiphysics 5.4 heat transfer model for a hydrogen production system consisting of a retort with two different heat sources, namely a heat tape and an infrared (IR) lamp. The main objective was to compare the two heat sources and find out which one offers a better technique for producing hydrogen by raising the internal center core temperature of the retort from ambient to the highest temperature, preferably 700℃, within the shortest time possible and using less power consumption in attaining the targeted temperature. Through this study, it was established that the IR lamp could potentially help with energy savings by using just 4 kWh to reach the targeted temperature within an hour.

xiv, 133 leaves : illustrations.

No description available.