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Filtering by: Creator Levien, Keith L. Remove constraint Creator: Levien, Keith L. Degree Field Chemical Engineering Remove constraint Degree Field: Chemical Engineering Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis

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  • 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

  • Simulation and optimization of an offshore natural gas process

    Creator:
    Chaiwanakupt, Nopasit
    Abstract:
    The principal objective of this study was to investigate process simulation and optimization of an existing offshore natural gas process which needed profitability improvements. Optimization was done using two alternative approaches: a global approach (response surface methodology) or a local approach (successive quadratic programming). The global approach was characterized by...
    Resource Type:
    Masters Thesis
    Full Text:
    Process Abstract approved: Keith L. Levien The principal objective of this study was to investigate