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Feedback Linearizing Control Strategies For Chemical Engineering Applications., Michael James Kurtz
Feedback Linearizing Control Strategies For Chemical Engineering Applications., Michael James Kurtz
LSU Historical Dissertations and Theses
Two widely studied control techniques which compensate for process nonlinearities are feedback linearization (FBL) and nonlinear model predictive control (NMPC). Feedback linearization has a low computational requirement but provides no means to explicitly handle constraints which are important in the chemical process industry. Nonlinear model predictive control provides explicit constraint compensation but only at the expense of high computational requirements. Both techniques suffer from the need for full-state feedback and may have high sensitivities to disturbances. The main work of this dissertation is to eliminate some of the disadvantages associated with FBL techniques. The computation time associated with solving a …
The Production Of Glucooligosaccharides By Leuconostoc Mesenteroides Atcc 13146 And Lipomyces Starkeyi Atcc 74054., Sun Kyun Yoo
The Production Of Glucooligosaccharides By Leuconostoc Mesenteroides Atcc 13146 And Lipomyces Starkeyi Atcc 74054., Sun Kyun Yoo
LSU Historical Dissertations and Theses
Glucooligosaccharides of less than DP 10 were produced either by mixed cultures of Leuconostoc mesenteroides ATCC 13146 and L. starkeyi ATCC 74054, or by an acceptor reaction produced by Leuconostoc mesenteroides ATCC 13146. The yields of glucooligosaccharides produced by mixed culture and acceptor reaction reached up to 49 and 90% of theoretical yield. The composition of carbohydrates at the end of fermentation by mixed culture was 31.4% oligosaccharides, 17.6% dextran, 31.4% mannitol, 2.1% fructose, and 2.4% of sucrose. The composition of carbohydrates at the end of fermentation by acceptor reaction was 32.7% pannose, 30.4% branched isomaltotetraose (DP 4), 21.7% branched …
Characterization Of Aminoalkylcarbamoyl Cellulosic And Chitosan Derivatives For Use In Cosmetic Formulation., Melissa Ann Manuszak Guerrini
Characterization Of Aminoalkylcarbamoyl Cellulosic And Chitosan Derivatives For Use In Cosmetic Formulation., Melissa Ann Manuszak Guerrini
LSU Historical Dissertations and Theses
Polymer and surfactant interactions have been a subject of intense research due to industrial applications utilizing a polymer-surfactant system, such as cosmetic formulation. A series of aminoalkylcarbamoyl cellulose derivatives were prepared from the amidation of methylcarboxymethyl cellulose. These derivatives were quaternized with either iodomethane, or hydroxypropyl trimethylammonium chloride, or epichlorohydrin and dimethylamine to yield polyquaternary ammonium salts. The focus of this dissertation is the characterization of a family of these compounds based on N,N$\sp\prime$,-dimethylethylene diamine. As these compounds are similar to Polyquaternium 10, a quaternized hydroxyethyl cellulose derivative, the solution properties have been characterized; antimicrobial activity and keratin affinity have …
Evaluation Of Alternative Gases For Immiscible Cyclic Injection., Sara Shayegi
Evaluation Of Alternative Gases For Immiscible Cyclic Injection., Sara Shayegi
LSU Historical Dissertations and Theses
Cyclic gas injection processes have been primarily restricted to the use of pure CO$\sb2$ or CO$\sb2$ that has been slightly contaminated with reservoir gases. However, it is difficult to employ CO$\sb2$ in certain circumstances due to transport, economic, or corrosion problems. This study presents the results of laboratory investigations of the cyclic gas injection process using methane, nitrogen and combinations of these gases with CO$\sb2$. Cyclic gas injections were performed at immiscible conditions in consolidated sandstone cores that contained waterflood residual oil under analogous conditions to previous cyclic CO$\sb2$ injections for comparative purposes. Pure methane recovered approximately the same amount …