Engineering Commons^™

So2-Scrubber Technology : Double Alkali Mode, Krishna K. Rao

Theses

Double alkali (D/A) processes for the desulfurization of flue gases occupy an increasingly important role in applied technology.

D/A processes involve two steps, namely, scrubbing and regeneration. In the scrubbing step, the alkali (Na₂SO₃) reacts with SO₂. In the regeneration step the acid formed, NaHSO₃, reacts with an alkali to regenerate Na₂SO₃.

This study was focused on the regeneration step. Regenerants investigated were slurries of lime and limestone. The major factors studied were reactor configuration and mixing patterns.

These systems were investigated in a batch, backmix, and plug-flow …

Municipal Point Source Pollution In The Hackensack Meadowlands Estuary, Alfonso Augustine Hernandez

Theses

A study was performed to evaluate the effectiveness of various sewage treatment facilities in the Hackensack Meadowlands District. The study dealt with overall plant efficiencies based on percent removals of suspended solids and Biochemical Oxygen Demand although other parameters were also included.

Samples for this study were obtained from the inlet and outlet channels of the individual plants. The parameters studied were: Suspended Solids, Biochemical Oxygen Demand, Total Nitrogen, Nitrate-Nitrite Compounds, Total Organic Carbon, Orthophosphate-P, Total Oxygen Demand and Fecal Coliform. Results obtained were averaged so as to collectively represent wet and dry weather conditions.

The results indicate that most …

The Separation Of Proteins Via Parametric Pumping And Ion Exchange, Paul Albert Falcon

Theses

A pH parametric pump, coupled with ion exchange, was used in an experimental investigation to separate a protein-water binary mixture. The model system consisted of a hemoglobin-water binary mixture. A pH gradient throughout the parametric pumping column was sustained with the use of hollow fiber devices incorporating phosphate buffer circulation.

Data is presented for both batch and semi-continuous recuperative mode pH parametric pumping. Continuous pH parametric pumping for protein isolation has also been envisioned.

No attempt has been made to optimize this newly devel-oped process; however, certain parameters are suspected of controlling separation, including buffer concentration, half cycle time, packed …

The Settling Of Particles In A Square Contained Medium, Richard S. Matyas

Theses

Stokes' Law, has been standardly utilized to calculate the terminal velocity of falling particles. However, the limitation of Stokes' Law is that it does not take into account the container walls and their resulting drag forces. Extensive work with additional drag due to cylindrical container walls has been examined by many investigators. The classical and earliest is the well know Ladenburg Correction which cannot be utilized with non-cylindrical containers. This experimental thesis examines the analog of the Ladenburg relationship for a square container. This experimental thesis was undertaken to experimentally determine the value of the constant K₁ for a …

Flow Of Polymer Melt Blends Through Porous Media, James Atwood Parker

Dissertations

The flow of molten polystyrene, poly(methyl methacrylate) and three blends of these polymers has been studied in a rheogoniometer and in packed beds of unconsolidated spherical glass beads. One primary purpose of the study was to determine the behavior of polymer melt blends in porous media flow. The second major purpose of the work was to develop and test a new and powerful model for packed bed flow based upon the Huang generalized rheological constitutive equations.

Rheological characterization of the pure polymers and blends was obtained using a Roberts-Weissenberg rheogoniometer. Shear and normal stresses were measured at shear rates from …

An Experimental Study Of Separation Of Binary And Ternary Gas Mixtures By Parametric Pumping, Stephen E. Belsky

Theses

An experimental study of gas parametric pumping is presented which examines the purification of helium using silica gel to remove the impurity carbon dioxide. Low gas flow rates are used to allow adequate time for equilibrium to be approached, assuming intraparticle diffusion is the controlling mass transfer step. By varying the cycle time, at long cycle times, the effect of penetration length (a function of dynamic capacity) is indicated. Also, at low cycle time, the effects during pressure changes become more significant.

Using low flow rate improves separation effectiveness if evaluated at equal dynamic capacity. When using low flow rate …

The Effect Of Ultrasonic Vibrations And Catalyst Particle Size On The Decomposition Of Cumene, John F. Pietranski

Theses

The effect of ultrasonic vibrations on the vapor phase decomposition of cumene to benzene and proplyene was investigated using silica-aluminum as the cracking catalyst.

The system consists of a tubular reactor with a 4 inch long catalyst chamber made from 1 cm. diameter stainless steel tubing. The catalyst bed was irradiated from above by means of an ultrasonic horn.

The reactor was run at temperatures of 850 to 950°F., frequencies of 26,000 and 39,000 Hz, with a power innut of 0.30 watts/cm.² . Feed rates of 100 to 300 gms./hr. and catalyst particle sizes of 0.0209 to 0.358 cm. …

Vapor-Liquid Equilibrium At Low Pressures : Correlation Of Binary And Prediction Of Multicomponent Data, Norman I. Silverman

Theses

The Wilson equation is chosen as typical of the new correlations for activity coefficients gaining wide distribution for use in the correlation and prediction of vapor-liquid equilibria today. Vapor liquid equilibrium data for 247 binary systems have been regressed against each of ten (10) objective functions and values of the Wilson energy parameters obtained. For the typical binary system, a wide variation of the Wilson energy parameters are observed when different objective functions are used with the given set of binary data. These are each examined with respect to their capability to correlate multicomponent vapor-liquid equilibrium data for seventy-three (73) …

Air Control In A Newark City Subway Station, Robert H. Burch

Theses

During the period from June, 1974 to January, 1976, 103 24-hr samples of the air at the Broad Street station of the Newark City Subway were collected by cascade impactor. The size distributions (based on Stoke's equivalent diameters) of the total suspended particulate matter were determined gravimetrically. Samples were also analyzed by atomic absorption spectrometry to obtain information on the concentration of iron, manganese, lead, copper, zinc, and cadmium in each size fraction. The geometric mean particulate level was found to be more than twice the Federal Ambient Air Quality Standard and triple that of ambient Newark air sampled nearby. …

Non-Equilibrium Parametric Pumps For Separating Liquids Or Gases, Anil Krishna Rastogi

Theses

An experimental and theoretical study has been done of Non-Equilibrium parametric pumps. Mathematical models and computer programmes are developed for both thermal and heatless parametric pumps based on non-equilibrium conditions and linear isotherms. A mathematical study was done for thermal parametric pumps whereas both experimental and theoretical studies were made for a heatless parametric pump. The effect of different operating conditions has been investigated on the separation of NaCl-H₂O via a thermal parametric pump and He-CO₂ and He-C₃H₆ gas mixtures via a heatless parametric pump.

The experimental study of heatless parametric pumps was extended …