Index Catalog // ScholarsArchive@OSU

Use of orthogonal collocation in the dynamic simulation of staged separation processes

Creator:: Matandos, Marcio
Abstract:: Two basic approaches to reduce computational requirements for solving distillation problems have been studied: simplifications of the model based on physical approximations and order reduction techniques based on numerical approximations. Several problems have been studied using full and reduced-order techniques along with the following distillation models: Constant Molar Overflow, Constant...
Resource Type:: Masters Thesis
Full Text:: L. Levien Two basic approaches to reduce computational requirements for solving distillation

The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide

Creator:: Yi, Jung-Seok
Abstract:: The extraction of pentachlorophenol (PCP) from pressure treated wood wafers with supercritical carbon dioxide has been studied. Experimental data were obtained for the effects of pressure (17.5 - 25.0 MPa), temperature (313 - 353 K), flow rate (1 - 3 ml/min at supercritical conditions), and sample size (0.8 x 10...
Resource Type:: Masters Thesis
Full Text:: Pentachlorophenol from Pressure Treated Wood Using Supercritical Carbon Dioxide Abstract Approved : Keith L

Experimental studies of internal model control

Creator:: Couturier, Patrick
Abstract:: A review of Single-Input Single-Output Internal Model Control (IMC) is presented, showing its relationships to the Dahlin algorithm, PID type controllers for simple models with and without deadtime and Smith predictor control. The effect of errors in the time constant and the gain of a first order model with deadtime...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy Dr. Keith Levien A review of Single-Input Single-Output Internal Model Control (IMC

Dynamic modeling of thermal treatment of timber poles

Creator:: Sahle-Demessie, Endalkachew
Abstract:: The temperature-time-location relationships during steam conditioning and pressure treatment of timber poles have been studied and mathematical models that take into account both the thermal properties of the poles and the parameters of the treatment process have been developed. Although much work has been previously done in this area, the...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Redacted for Privacy Keith Levien The temperature-time-location relationships during

Solubility of biocides in pure and modified supercritical carbon dioxide

Creator:: Junsophonsri, Sarawadee
Resource Type:: Masters Thesis
Full Text:: Modified Supercritical Carbon Dioxide. Abstract approved: Keith L. Levien A continuous flow apparatus

Physical and numerical approximations of reactive distillation dynamics

Creator:: Pavarajarn, Varong
Abstract:: Two approaches to reduce computational requirements for solving reactive distillation problems have been studied: simplification of the model using physical assumptions and numerical approximation using an orthogonal collocation technique. The results of a full-order model with time dependent stage molar holdups was compared to published steady-state experimental data and was...
Resource Type:: Masters Thesis
Full Text:: Reactive Distillation Dynamics. Abstract approved: Keith L. Levien Two approaches to reduce

Diffusion coefficients of biocides in supercritical carbon dioxide

Creator:: Kittidacha, Witoon
Resource Type:: Masters Thesis
Full Text:: like to express my appreciation to my major professor, Dr. Keith L. Levien for his support, patience

Computer assisted design of humidification equipment

Creator:: Harvey, Glenn B.
Abstract:: A computer assisted design model, developed for undergraduate students to teach the basic principles of humidification design, is developed and presented. Beginning with the development of the differential equations, the conversion to numerical code is presented, followed by a series of applications to mechanical draft in cooling towers, natural draft...
Resource Type:: Masters Thesis
Full Text:: approved: Redacted for Privacy Dr. Keith Levien A computer assisted design model, developed for

Modeling large temperature swings in heat regenerators using orthogonal collocation

Creator:: Kokron, Carlos J.
Abstract:: This thesis examines the transient performance of packed bed heat regenerators when very large temperature differences are involved. The effects of gas temperature on the key gas physical properties of velocity, density and heat capacity were studied via simulation. Three models were developed and compared. The first model (HRKDV) considers...
Resource Type:: Masters Thesis
Full Text:: L. Levien This thesis examines the transient performance of packed bed heat regenerators when very

Phase behavior of multicomponent mixtures of complex molecules in supercritical fluids

Creator:: Hassan, Ali (Ali Humaid)
Resource Type:: Dissertation
Full Text:: Mixtures of Complex Molecules in Supercritical Fluids Abstract approved: Keith L. Levien Supercritical

ScholarsArchive@OSU

Use of orthogonal collocation in the dynamic simulation of staged separation processes

The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide

Experimental studies of internal model control

Dynamic modeling of thermal treatment of timber poles

Solubility of biocides in pure and modified supercritical carbon dioxide

Physical and numerical approximations of reactive distillation dynamics

Diffusion coefficients of biocides in supercritical carbon dioxide

Computer assisted design of humidification equipment

Modeling large temperature swings in heat regenerators using orthogonal collocation

Phase behavior of multicomponent mixtures of complex molecules in supercritical fluids

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