Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 26 for “"Batch Processes"”.
-
Optimal design and operation of batch processes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1990.
-
Synthesis of batch processes with integrated solvent recovery
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
-
Modeling and computational issues in the development of batch processes
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
-
Long-term scheduling technique for wastewater minimisation in multipurpose batch processes
… in literature on wastewater minimisation for batch processes are based on short-term scheduling techniques. When these methods are applied to longer time horizons, the computational time becomes intractable, hence the focus of this thesis. This thesis presents a methodology for simultaneous …
-
On-line Final Quality Prediction for Multiphase Batch Processes with Uneven Durations
Industrial batch processes are essential for producing high-value, low-volume products – especially in pharmaceutical, biotechnology, and specialty chemical industries. However, their inherent characteristics present significant challenges for on-line quality monitoring – transient, uneven batch …
-
Control strategies for exothermic batch and fed-batch processes A sub-optimal strategy is developed which combines fast response with a chosen control signal safety margin. Design procedures are described and results compared with conventional control.
… improving the temperature control of exothermic processes. In this thesis, a sub-optimal control strategy is developed through utilizing the dynamic, simulation tool. This scheme is built around easily obtained knowledge of the system and still retains flexibility. It can be applied to both …
-
Thermal stability criteria embedded in avanced control systems for batch process intensification
Thermal stability of batch processes is a major factor for the safe and efficient production of polymers and pharmaceutical chemicals. The prediction of thermal stability for such nonlinear, non steady-state processes is unreliable when using most stability criteria found in literature. A new …
-
Design and operational enhancements for a batch process driven supply chain
… at Eastman Kodak involves large-scale batch steps dictated by both technical and economic factors. Large-scale batch processes can lead to an unresponsive and wasteful supply chain. This thesis explores supply chain design and operational improvements that can mitigate the effects …
-
Continuous processing of multiphase reactions for pharmaceutical applications
… as an attractive alternative to the conventional batch processes. Numerous technologies have emerged to facilitate the development of continuous flow chemistry, and the benefits of flow chemistry have been successfully demonstrated for many chemistries that would otherwise be challenging in …
-
Design of a rapid, continuous, small-scale device for creating dry powders from concentrated suspensions containing active pharmaceutical ingredients
… of producing pharmaceutical compounds are large batch processes. The minimum time-to-patient for drug manufacturing is approximately 100 days. Using a continuous manufacturing process, the time-to-patient could be reduced to less than ten days. The scope of this paper encompasses the design of a …
-
CONTINUOUS-FLOW STRATEGIES FOR THE PREPARATION OF ACTIVE PHARMACEUTICAL INGREDIENTS AND RELEVANT INTERMEDIATES
… handling and improved selectivity compared to batch processes. The second part describes the use of metallaphotoredox catalysis for the synthesis of tryptamine derivatives, highlighting the potential of light-driven processes to access structurally complex motifs under mild conditions. The …
-
Design and fabrication of nanotweezers for nanomanipulation
… such devices are not fabricated using completely batch processes and lack the consistency, feature definition, and ease of production required for general use. In this project, we propose a completely batch fabricated nanotweezer designed for compatibility with the AFM. We have developed a …
-
Chemical kinetic investigation of a commercial batch reactor process
… the chemical reactions occurring during the batchwise production of a butylated melamine-formaldehyde resin, in order to optimise the efficiency and economics of the batch processes. The batch process models are largely empirical in nature as the reaction mechanism is unknown. The process …
-
Vision based iterative learning control for a roll to roll micro/nano-manufacturing system
… micro/nano-manufacturing have transitioned from batch modes of fabrication on the traditionally rigid substrates to continuous modes of fabrication on flexible substrates. The majority of these continuous systems utilize a Roll to Roll (R2R) system approach. Regardless of the manufacturing …
-
Novel Applications of Hot-Melt Extrusion Technology
… lipid carriers are multi-step and time consuming batch processes with low productivity. The low mixing efficiency coupled with high batch to batch variability makes these methods less industrial friendly. After optimization of screw configuration and process parameters, these formulations were …
-
Probing Control of Glucose Feeding in Escherichia coli Cultivations
… source that usually is glucose. In fed-batch processes the glucose feed rate can be manipulated to avoid acetate formation, but most feeding strategies require considerable process knowledge to handle process variations. On-line measurements for the relevant process variables are far …
-
Continuous synthesis of iron and aluminium-based nanoparticles
… temperature. This thesis employs continuous flow processes as an alternative to standard batch processes to address the challenge raised by nanomaterial synthesis scale-up. Continuous processes are more reproducible because they provide accurate control over fluid dynamics, heat and mass transfer. …
-
DEVELOPMENT OF FLOW PROCESSES FOR THE EFFICIENT AND SUSTAINABLE PREPARATION OF HIGH VALUE CHEMICALS
… the development and implementation of chemical processes, materials, and technologies that fulfill present needs without compromising the ability of future generations to meet theirs. Growing concerns over global pollution and resource depletion have underscored the urgency of reducing the …
-
Exception Handling in Recipe-Based Batch Control
… thesis is exception handling in recipe-based batch control. Exception handling is a critical element for achieving long-term success in batch production. It is reported to constitute 40-60 percent of the batch control design and implementation effort. Correct handling of exceptions is a key …
-
The Development of Hybrid Process Control Systems For Fluidized Bed Pellet Coating Processes
… conventional basic control for pharmaceutical batch processes has several drawbacks. The basic control often uses constant process settings discovered by trial and error. The rigid process operation provides limited process understanding and forgoes the opportunities of process optimization. …
Page 1 of 2