Chemical Engineering Commons^™

Enhancement Of Anaerobic Digestion Of Actual Industrial Wastewaters : Reactor Stability And Kinetic Modeling., Mahyar Ghorbanian

Electronic Theses and Dissertations

Industrial plants pay disposal costs for discharging their wastewater that can contain pollutants, toxic organics and inorganics, to the sewer based on the Biological Oxygen Demand (BOD) or Chemical Oxygen Demand (COD) of the streams. It has become increasingly expensive for industry to meet stringent regulatory standards. One solution to reduce this cost is to anaerobically degrade the COD content, which in turn generates useful methane gas that can be used to generate useful energy or heat. Anaerobic Digestion (AD) is one of the most suitable renewable resources of conversion of industrial wastewaters to bioenergy, but it is not widely …

Cfd Modeling Of Entrance And Exit Geometries Of A Wind Speed Accelerator., David Russ

Electronic Theses and Dissertations

Current wind power technology is not economically feasible throughout most of the United States due to low average wind speeds. A design for a small-scale wind concentrator device suitable for use in areas of low wind velocity was tested using computational fluid dynamics (CFD). Using a novel approach, the device seeks to accelerate incoming air above minimum velocities required for economical power generation. The novel approach employs a funnel shaped inlet with relief vents along the circumference, so as to alleviate backpressure. Both inlet and outlet sections utilize funnel shapes with both parabolic and hyperbolic regions. All geometry and mesh …

Cost Effective Human Protein C Purification From Cohn Fraction Iv-1 Using Mini-Antibody., Doh Gyeuhn Ahn 1969-

Electronic Theses and Dissertations

Protein C (PC) is an important anticoagulant, antithrombotic, and antiinflammatory in blood plasma. PC deficiency can lead to severe venous thrombotic events, including lung embolism, stroke, and heart attack. In the body, PC is activated only when it is needed, and, therefore, PC does not cause bleeding problems that currently available anticoagulants may do. Purification of PC from plasma is currently done by immunoaffinity chromatography using monoclonal antibodies (Mabs), which is very expensive. Single chain variable regions (mini-Mab) with a PC binding capability, which can be produced in recombinant E. coli , were developed for PC purification. Compared to Mabs, …

The Separation Of Zirconium And Hafnium By Distillation : Ii. An Engineering Appraisal Of Aluminum Structural Materials., Everard G. Baker

Electronic Theses and Dissertations

A compilation of references dealing with the separation of hafnium and zirconium is presented, together with an evaluation of their possibilities. It is concluded that a distillation procedure holds the greatest promise. The theory of the separation of hafnium and zirconium by distillation of suitable compounds is given and experimental investigations are presented for confirmation.

A Thermometer Technique For The Determination Of Emissivities Of Finishes., N. P. Shah 1923-

Electronic Theses and Dissertations

Two thermometer techniques for the determination of emissivities of surface coatings are presented. One procedure involving the attainment of steady state hear transfer relations in coated thermometers placed through the wall of a duct at right angles to the direction of air flow was found to give consistent results. Another procedure based upon the rate of change of thermometer temperature was found to give consistent results only with excellent control of air conditions. The emissivities of a variety of paints, varnishes and lacquers were determined for temperature range 90⁰ F. to 140⁰ F. using silver and black coatings for standardization. …

A Study Of The Effect Of Pigmentation On The Film Properties Of Ethocel : Part Ii. A Study Of The Effect Of Sun Light On The Color Of Pigments., Mansur Ahmad

Electronic Theses and Dissertations

The purpose of this investigation was to determine quantitatively the effect of pigmentation on the film properties of ethocel lacquer. This study was confined to the determination of tensile strength, percentage elongation at failure, softening and melting points of the films. Pigments were ground in the ethocel lacquer containing three parts ethocel, one part 276V-9 Dow resin and sixteen parts solvent by weight. Softening and melting points of the films were determined and were found to increase uniformly with increasing amounts of the pigments. The tensile strength of ethocel film with titanium dioxide as a pigment increased from 317 Kgm/Cm2 …

Semi-Micro Combustion, Solvent Extraction, And Oleic Acid Adsorption Of Synthetic Drying Oils : Part Ii., Isadore Nathan Cooperman

Electronic Theses and Dissertations

The rates of oxidation, solvent solubility, and oleic acid adsorption, of natural and synthetic drying oil films were studied by semi-micro analytical methods.

This thesis consists of three phases:

I. Ultimate analysis to determine the oxygen content of a film at specific time intervals.

II. Extraction of the films to determine their solvent solubility as a function of time.

III. Oleic acid adsorption to get a correlation of the structure of the film.

Seven materials were examined:

A. Glyceryl Trilinoleate

B. Pentaerythritol Tetralinoleate

C. Pentaerythritol Oleate

D. Pentaerythritol Oleic Acid Long Oil Alkyd

E. Dipentaerythritol Linoleate

F. Pentaerythritol Linoleate

Glyceryl …

Newspaper Matrix Backing Techniques., Robert Roscoe Childs

Electronic Theses and Dissertations

The problem of developing suitable materials and techniques for the elimination of hand backing of mats was undertaken. A thermosetting resin of the resorcinol type, ad-mixed with 15 to 25 per cent short-fiber asbestos, was applied to the mats both as a paste and in the form of a partially cured resin sheet. Its use was discontinued since its inherent insulating properties and warpage were found to be undesirable.

After experimenting with several other backing materials and methods, the following procedure was concluded to be feasible:

(1) Spraying sodium silicate solution upon a sheet of blotting paper.

(2) Pressing the …

Relative Volatility Of Esters In Ethyl Alcohol-Water-Ester System., Yi-Chung Chang

Electronic Theses and Dissertations

The relative volatillities of five branch-chained esters with respect to ethyl alcohol in mixtures of ethyl alcohol and water containing small amounts of esters were determined experimentally. The results could be used in the design of distillation columns for ethyl alcohol purification.

For alcohol concentrations of more than 50 mol per cent, the increase of relative volatility of the esters was inversely proportional to the alcohol concentration. For dilute concentrations of less than 30 mol per cent the increase in volatility was very rapid, and the rates of increase were different for different esters. No simple quantitative correlation was established …

A Study Of Diffusion In Distillation., Joseph G. Duffey

Electronic Theses and Dissertations

A study of the mass transfer phenomena in fractional distillation was made. Small scale single slot, single cap apparatus was used to obtain the necessary experimental data.

The mass transfer coefficient KgA was calculated using several combinations of liquid and vapor compositions in the menthanol - water system under static liquid conditions. The correlation showed that KgA held about constant over the entire range of concentrations.

The problem of bubble area was studied and reasonable estimations of area, bubble frequency, and time of rise were made. This information is to be incorporated into the calculation of the mass transfer coefficient …

Utilization Of Unwashed Low Grade Phosphate Rock., Stanley Goldsmith 1924-

Electronic Theses and Dissertations

No abstract provided.

Plywood Adhesive Development., Edward J. Dowd

Electronic Theses and Dissertations

This thesis is primarily a study of two-step plywood adhesives made with varying amounts of phenol, 1, 3, 5 xylenol, resorcin, and formaldehyde. Each resin was evaluated by using it as the adhesive in making plywood. The plywood was then tested for shear strength and wood failure after a four hour boil.

Procedures are given for making and testing various straight phenolic resins and resins modified with 1, 3, 5 xylenol or resorcin, or comibinations of both of these accelerating resins.

The straight phenolic resins gave boil-proof bonds, but the curing cycle was too long. Those phenolics modified with 1, …

Accelerated Curing Of Superphosphate Fertilizer., Gus W. Leep

Electronic Theses and Dissertations

Simultaneous drying of curing superphospate is shown to be of definite value in increasing the available P2O5 content. Raw superphosphate heated to 80 degrees C., and analysed after 1 hour, 4 hours, 24 hours, and 48 hours of curing contained 16.92%, 19.67%, 20.66%, and 20.78% of available P2O5 respectively. For the same periods of time samples cured at room temperature contained 15.28%, 17.1%, 17.7%, and 18.82% of available P2O5. There was a larger amount of P2O5 available after 4 hours heating than after 48 hours at room temperature. This increase represented a 12:1 time-ratio in favor of the heated sample. …

High Temperature Coatings For Aircraft., Arthur Hoff Isaacs 1924-

Electronic Theses and Dissertations

No abstract provided.

Plywood Adhesive Development., Jesse R. Goza 1922-2013

Electronic Theses and Dissertations

No abstract provided.

Cigarette Resistant Finish : Ii. Glue Applicator Design : Iii. Preliminary Study Of Rubber-Phenol Co-Polymers, Glenn T. Martin 1922-1984

Electronic Theses and Dissertations

No abstract provided.

Semi-Micro Combustion And Solvent Extraction Of Natural And Synthetic Drying Oils, Part I., Man Mohan Moudgill

Electronic Theses and Dissertations

No abstract provided.

Fiberboard From Wood Chips : Ii. Diffusion Of Water Through Glue Lines In White Oak Veneer : Iii. Factors Affecting Plate Efficiency Of Bubble Cap Distillation Columns., Dwight L. Mckay 1924-2012

Electronic Theses and Dissertations

No abstract provided.

Froth Flotation Of Phosphate Rock., David L. Spitzer 1923-2012

Electronic Theses and Dissertations

No abstract provided.

Water And Water Vapor Barriers For Structural Plywood : Ii. Core Void Fillers For Structural Plywood., James Van Dyck Fear

Electronic Theses and Dissertations

This thesis presents the results of an investigation conducted to improve the weather resistance of plywood assemblies used in prefabricated housing manufacture. Specifically, this work involved water sealers for edge joints (called edge sealers), the prevention of surface transfer of water vapor through plywood (called vapor barriers), and fillers for structural defects in the wood (called core void fillers). Two edge sealers for plywood were developed that were considered successful in resisting water permeation. One was a quick drying paint formulated by the addition of 30 per cent leaded zinc oxide to 70 per cent Arco primer paint No. 156. …

A Substitute For Wood Veneer., Edwin R. Arbegust

Electronic Theses and Dissertations

This thesis is a report of an investigation for a substitute for wood veneer to be used as face material for wire-bound boxes. The fiberboard substitute was made using a heavy paper backing with a wood waste mixture of chips and sawdust with various types of adhesive binders. The following adhesives were used singly and in mixtures: Starch, sodium silicate, asphalt emulsion, animal glue, urea resin with a wheat flour extender, rosin, and casein. The composition and test results of the fiberboard panels made in the laboratory are reported.

High Temperature Coatings., Irvin Henry Lutz

Electronic Theses and Dissertations

This thesis is a report on coatings exclusive of the porcelain enamels which may be used at temperatures as high as 750*F., and also a description of the properties of the more heat resistant resins of commerce. The method of preparation and testing of the various coatings investigated in this research is given, and the results are tabulated and discussed. Best results were obtained with Dow Corning silicones of the 800 series heavily pigmented with either zinc dust or aluminum bronze, and with glycerol phthalate -- silicone coatings pigmented with aluminum bronze.

Solvent Extraction Of Fish Oil., Alan T. Thomas 1921-2001

Electronic Theses and Dissertations

No abstract provided.

The Destearination Of Menhaden Fish Oil By Use Of A Votator And An Auxiliary Plate And Frame Filter Press., Douglass White 1920-2013

Electronic Theses and Dissertations

No abstract provided.

A Correlation Of Plate Efficiencies In Fractionating Columns., Earl K. Stigger 1920-2007

Electronic Theses and Dissertations

No abstract provided.

Characteristics Of A Falling Film Distillation Column., Edward J. Kimmel 1920-

Electronic Theses and Dissertations

No abstract provided.

The Development Of An Ethocel Automobile Touch-Up Lacquer And A Suitable Sanding Surfacer : Ii. A Study Of The Physiological Effect Of Color Using The Munsell Color Notation., Thaddeus Andrew Peake 1919-1999

Electronic Theses and Dissertations

No abstract provided.

Graphical Analysis Of Certain Diffusion Problems., Wylie C. Kirkpatrick 1918-2008

Electronic Theses and Dissertations

No abstract provided.

Aircraft Finishes For Elevated Temperatures., Wilbur Louis Hayne 1922-

Electronic Theses and Dissertations

No abstract provided.

Heat Sealing Properties Of Ethyl Cellulose Modified Lacquers., William B. Moore 1924-2015

Electronic Theses and Dissertations

No abstract provided.