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Showing 1 to 20 of 99 for “"Separation Processes"”.
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Novel materials for membrane separation processes
The aim of this work was to synthesise a series of hydrophilic derivatives of cis-1,2-dihydroxy-3,5-cyclohexadiene (cis-DHCD) and copolymerise them with 2-hydroxyethyl methacrylate (HEMA), to produce a completely new range of hydrogel materials. It is theorised that hydrogels incorporating such …
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The application of electrophoresis to separation processes
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1958
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Tools for efficient design of multicomponent separation processes
<p>Separations account for as much as 85% of plant operating costs in chemical production; it is therefore important that they be designed with energy efficiency in mind. This can only be achieved if two things are achieved: the complete space of design options is known, and an accurate way is …
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Simulation and optimization of hot syngas separation processes in integrated gasification combined cycle
… loss. It is therefore important to develop processes that remove these impurities from syngas at an optimally high temperature in order to maximize the energy efficiency of an IGCC plant. The high temperature advanced syngas cleanup technologies are presently at various stages of development …
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RECOVERY AND SEPARATION PROCESSES IN THE RECYCLING CHAIN OF POLYAMIDE PLASTIC MATERIALS TO OBTAINECO-SUSTAINABLE RAW MATERIALS
… were effective, but solvent B allowed better separation, reducing contamination and preserving the possibility to reuse PU. Moreover, by adjusting the composition of the solvent mixture, it was possible to tune the selectivity of the process, either favouring the dissolution of polyamide or …
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Literature Review on Li⁺/Na⁺ and Li⁺/K⁺ Separation Processes Compatible with Multistage MSED/NF Lithium Extraction System
… separated out using membrane-based desalination processes like monovalent-selective electrodialysis (MSED) or nanofiltration (NF). The Lienhard Research Group has developed a multistage MSED or NF system to extract lithium from brine. This system still must address the separation of Li⁺ from Na⁺ …
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Infinite dilution activity coefficient measurements of different organic solutes in cyrene as a potential green solvent for chemical separation processes
This dissertation is submitted in the fulfilment of the requirements for the degree of Master of Engineering in Chemical Engineering, Durban University of Technology, Durban, South Africa, 2024.
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Irreversibilities and nonidealities in desalination systems
… the actual performance obtained. Least work of separation for a desalination system is derived and generalized to apply to all chemical separation processes driven by some combination of work, heat, and chemical energy (fuel) input. At infinitesimal recovery, least work reduces to the minimum …
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Scalable Synthesis and Separation Performance of Covalent Organic Framework and Contorted Polyamide Membranes
Separation processes are imperative to industries including chemical manufacturing, resource recovery and product purification. Conventional separation processes like distillation and solvent extraction are energy and chemical intensive with large environmental footprints. Membrane separation …
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Scalable Synthesis and Separation Performance of Covalent Organic Framework and Contorted Polyamide Membranes
Separation processes are imperative to industries including chemical manufacturing, resource recovery and product purification. Conventional separation processes like distillation and solvent extraction are energy and chemical intensive with large environmental footprints. Membrane separation …
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The application of separation indices to multistage systems
The applications of the extent of separation and the extent of purification to multistage separation processes have been studied in detail. Neither index is suitable for stage-to-stage calculations in such processes. This is due to the fact that, at any stage, both indices depend only on the outlet …
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A New Computational Model to Augment the Design of Microfluidic Separations: Electric Field Assisted, Hydrodynamic Chromatography
… computational model to simulate the microfluidic separation of like-charged particles in a continuous flow environment. By accomplishing this task the model can be used to optimize future fractionations by tailoring the process parameters to the properties of the target particles. The primary goal …
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Simulation and Comparison of Operational Modes in Simulated Moving Bed Chromatography and Gas-Phase Adsorptive Separation
… optimization of adsorptive and chromatographic separation processes. The first part focus on the simulation and comparison of operational modes in simulated moving bed (SMB) chromatography for separation and purification in bioprocesses. The second part includes the simulation of gas-phase …
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Design of Mixed-Solvent Extraction and Size-Exclusion Simulated Moving Bed Chromatography to Recover Valuable Compounds from Electronic Waste
… waste steam at a rate of 3-5% per year. Two separation processes are developed to efficiently recover these valuable compounds.
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Advancing Industrial Decarbonization: Evaluating the State of Organic Membrane Technology for Class-Based Hydrocarbon Separation
Industrial organic chemical separations are major contributors to carbon dioxide (CO$_2$) emissions in the energy industry, contributing to global temperature rise. As membrane separations have successfully reduced energy requirements in water purification and desalination, their application in …
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Post precipitation treatment of copper sulphide particles to improve settleability
… particle formation in precipitation-based separation processes results in sub-optimal solid-liquid separation that can be alleviated by the production of more crystalline particles or agglomerates. In order to enhance agglomeration and settling, investigations on the effect of dissolved …
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Separación de aminoácidos y derivados utilizando resinas impregnadas de extractante
… la aplicación industrial. __________________ Separation of amino acids (α-phenylglycine and aspartic acid) and by-products (betaine), as they are biocompounds of food and pharmaceutical interest, was carried out with a new extraction technology using extractant-impregnated resins. This study …
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The effects of isotopic separation on closed nuclear fuel cycles
… outcomes of removing a single isotope during separation processes. Two strategies for managing the removed isotope are considered. The first strategy looks at removal of a short to intermediate lived isotope from a mass stream to be recycled and subsequently recycling its decay daughter in a …
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