Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Theses/Dissertations

Chemical engineering

Materials Science and Engineering

2003

Articles 1 - 2 of 2

Full-Text Articles in Engineering

Analysis And Design Of A Calcium-Based Sulfur Sorbent For Applications In Integrated Gasification Combined Cycle Energy Systems , David Johann Ludwig Hasler Jan 2003

Analysis And Design Of A Calcium-Based Sulfur Sorbent For Applications In Integrated Gasification Combined Cycle Energy Systems , David Johann Ludwig Hasler

Retrospective Theses and Dissertations

The reactivity of various Ca-based sorbent materials in pelletized form with H2S or CO2 was investigated at high temperatures (750--880°C). An extensive study was conducted to compare the performance of sorbent pellets derived from plaster of Paris and limestone. Multicycle absorption and regeneration tests showed that plaster-based pellets out performed the limestone-based pellets primarily due to a higher surface area and mesoporosity.;The effect of pore-modifiers on the reactivity of limestone with H 2S was investigated by incorporating additives such as cornstarch, graphite and polyvinylalcohol (PVA) in the sorbent. Multicycle sulfidation and regeneration tests of the modified sorbent showed ...


Behavior Of Interfacial Micro-Defects In Aluminum And Its Oxide Film , Renchun Huang Jan 2003

Behavior Of Interfacial Micro-Defects In Aluminum And Its Oxide Film , Renchun Huang

Retrospective Theses and Dissertations

In this dissertation, numerical simulation was used to calculate the equilibrium solution composition of cylindrical nanopores in surface oxide films as a step to evaluate their possible roles in the breakdown of protective oxide films. The solution composition of such nanopores is of interest from a corrosion perspective, since they play prominent roles in several mechanisms for the breakdown of passive films leading to pitting corrosion. The chemical composition of the pore solution would determine whether rapid dissolution at the pore could initiate. The effects of nanoscale pore dimensions, solution pH and adsorbing ion borate concentration on the solution composition ...