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Reducing Of Iron Corrosion In Water Pipelines By Hydrogen Addition, Feraih Sh. Alenazey
Reducing Of Iron Corrosion In Water Pipelines By Hydrogen Addition, Feraih Sh. Alenazey
Graduate Theses, Dissertations, and Problem Reports
Water is provided to the citizenry of the Kingdom of Saudi Arabia by the desalination of seawater. The purified water is then transported through extensive pipelines to the cities where it is used. During the process of transport the water becomes polluted with soluble iron.;The corrosion of iron in the pipelines is the result of an oxidation reduction reaction. In that reaction hydrogen ion is reduced and the iron is oxidized. The hypothesis of this thesis is that the electrochemical potential of the hydrogen half-cell reaction can be reduce by dissolution of hydrogen gas in the water. If that value …
Reaction Engineering Study Of Natural Gas Hydrate Formation In Special Packed -Bed Reactors By Controlling The Boundary Layer Surfaces Of The Gas -Liquid -Solid Phases, Budhijanto Budhijanto
Reaction Engineering Study Of Natural Gas Hydrate Formation In Special Packed -Bed Reactors By Controlling The Boundary Layer Surfaces Of The Gas -Liquid -Solid Phases, Budhijanto Budhijanto
Graduate Theses, Dissertations, and Problem Reports
Natural gas hydrates (NGH) are crystalline compounds that consist of water and natural gas (NG) molecules. By hydrogen bonds, water molecules form a regular lattice structure containing many cavities. NG molecules occupy the cavities, and therefore stabilize the cavities. NGH are considered to be one of the most potential alternative world energy resources. The applications of NGH in other fields, such as NG purification, storage, and transportation, are also possible. To obtain the full benefits of all the possible applications of NGH, a full understanding of the kinetics of NGH formation is needed.;Strictly speaking, the experimental works of reproducible intrinsic …
Basic Theory And Experimental Approach To Characterize Flow And Fracture Properties Of Fine Powder Bulk Body, Wiratni Wiratni
Basic Theory And Experimental Approach To Characterize Flow And Fracture Properties Of Fine Powder Bulk Body, Wiratni Wiratni
Graduate Theses, Dissertations, and Problem Reports
This dissertation comprised two parts, which were Part I for the development of a method to characterize the fine powder flow at ambient temperature and Part II for the application of the method in fine powder aeration at elevated temperature.;The analysis conducted on fine powder aeration in Part I was based on the theory of homogeneously-aerated-expanded (HAE) emulsion phase, which viewed a system of aerated fine powders as a quasi-solid single phase.;The original aeration data from an aeration experiment (gas velocity, pressure drop, and bed height) were transformed into the new variables specifically defined for aerated fine powder (powder strain …
Alkaline Durability Tests For E-Glass/Vinyl Ester-Reinforced Polymer With Nanoclay, Shu-Kai Yeh
Alkaline Durability Tests For E-Glass/Vinyl Ester-Reinforced Polymer With Nanoclay, Shu-Kai Yeh
Graduate Theses, Dissertations, and Problem Reports
Two kinds of GFRP (glass fiber reinforced plastics) composite materials were prepared and used in this study. One was E-glass/vinyl ester glass fiber reinforced polymer (plain GFRP) and the other was nano-GFRP prepared with the addition of 1 wt% of CloisiteRTM 10A nanoclay. These samples were aged in an alkaline solution (pH = 13.2) with 3560N (800-lbs), 2225N (500-lbs) and 885N (200-lbs) of sustained load, which were 50%, 31% and 12.5% of the tensile strength, respectively. Time to failure or tensile strength reduction was measured and used to determine durability of the samples in terms of Aging Index, which was …
Real-Time Measurement Of Oxides Of Nitrogen From Heavy-Duty Diesel Engines, Aparna Aravelli
Real-Time Measurement Of Oxides Of Nitrogen From Heavy-Duty Diesel Engines, Aparna Aravelli
Graduate Theses, Dissertations, and Problem Reports
New emissions regulations and performance requirements imposed on modern diesel engines encourage the development of improved tools for emissions measurements. This study investigated one of the improved tools for NOx emissions measurement. Objectives of this thesis included measurement, comparison and prediction of NOx emissions from heavy-duty diesel engines using two different NOx analyzers. Steady state and transient tests were conducted on six heavy-duty diesel engines in the WVU Engine and Emissions Research Center (EERC). NOx emissions were measured using a conventional Rosemount NOx analyzer and a Cambustion fast response NOx analyzer. The Rosemount analyzer sampled dilute emissions whereas the fast …
Hybrid Neural Networks Models For A Membrane Reactor, Mohammed Al-Yemni
Hybrid Neural Networks Models For A Membrane Reactor, Mohammed Al-Yemni
Graduate Theses, Dissertations, and Problem Reports
Artificial neural networks (ANN) have become an established discipline and have gained extensive interest within chemical engineering. In recent years, research effort has focused on the use of "hybrid artificial neural networks" (HANN) models that combine both the deterministic and the ANN elements. Several methods have been proposed for combining ANN with first principle relations. In this thesis, a new hybrid scheme, which is similar to that developed by Kasprow for a space-independent and time-dependent fed-batch microbial reactor, was developed for a space-dependent steady-state enzymatic reactor. This scheme combines ANN with mass balances and assumed rate expressions. It was shown …
Moisture Diffusion Through Neat And Glass-Fiber Reinforced Vinyl Ester Resin Containing Nanoclay, Hiteshkumar T. Rana
Moisture Diffusion Through Neat And Glass-Fiber Reinforced Vinyl Ester Resin Containing Nanoclay, Hiteshkumar T. Rana
Graduate Theses, Dissertations, and Problem Reports
Moisture diffusion was studied through neat resin as well as glass-fiber reinforced vinyl ester samples, both containing up to 5 wt% montmorillonite clay. Transient and steady-state diffusion experiments were carried out with both neat resin as well as glass-fiber reinforced samples. Effect of saline and alkaline solutions on the process of diffusion was studied. It was found that the diffusivity decreased due to the presence of nanoclay in polymer. SEM images of FRPs were taken after two months of immersion in distilled water at room temperature. The SEM images revealed that the presence of clay indeed protected the glass-fibers. Effect …
In-Situ, Near Real-Time Acquisition Of Particle Movement In Rotating Drum Coating Equipment, Sandeepa Sandadi
In-Situ, Near Real-Time Acquisition Of Particle Movement In Rotating Drum Coating Equipment, Sandeepa Sandadi
Graduate Theses, Dissertations, and Problem Reports
The uniformity of coating applied to large particles and tablets in rotating-drum coating devices is of significant interest to the Pharmaceutical Industry, especially when the coating contains active material or provides a sustained release barrier for drug transport in a functional coat. As tablets move around the coating drum, they periodically spend time at the surface of the avalanching layer and pass through the spray zone. During this time they receive amounts of coating solution proportional to both the time spent in the spray zone and the area exposed to the spray. The purpose of this research was to quantify …
Modeling Of Product Variability In Fluidized Bed Coating Equipment, Ku Zilati Ku Shaari
Modeling Of Product Variability In Fluidized Bed Coating Equipment, Ku Zilati Ku Shaari
Graduate Theses, Dissertations, and Problem Reports
Particle coating in fluidized bed equipment is common practice for improving the properties of solid products, particularly in the pharmaceutical, food and agricultural industries. In this thesis, the application of particle coating to pharmaceutical products utilizing the Wurster-column coating process is addressed. This technique is extensively used in the pharmaceutical industry for precision drug coating and modified release coating of tablets and pellets.;The simulation of particle movement in fluidized beds has been successfully developed using Monte Carlo simulation. Raw velocity and voidage data for each region of a semicircular fluidized bed, obtained by Subramanian (2001), are used in the simulation. …