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Showing 1 to 20 of 30 for “"Potassium carbonate"”.
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Experimental and theoretical study of carbon dioxide absorption into potassium carbonate solution promoted with enzyme
… A novel process called Integrated Vacuum Carbonate Absorption Process (IVCAP), which employs potassium carbonate (PC) as a solvent, has been proposed. Since chemical affinity of CO2 to K2CO3 is weak compared to MEA, the regeneration of CO2-rich solution can be operated under vacuum at a …
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Thermoeconomic analysis and optimization of geothermal power cycle utilizing aqueous potassium carbonate for scrubbing superheated steam
… geothermal power plant cycle utilizing aqueous potassium carbonate as a means of scrubbing the geothermal steam. This method of scrubbing is capable of preventing the loss of superheat while removing impurities from the steam. The main impurities of interest in this case are silica and chloride, …
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Development and demonstration of a new non-equilibrium rate-based process model for the hot potassium carbonate process.
… desorption is developed and applied to the hot potassium carbonate process CO₂ Removal Trains at the Santos Moomba Processing Facility. The rate-based process models incorporate rigorous thermodynamic and mass transfer relations for the system and detailed hydrodynamic calculations for the …
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CO2 absorption into concentrated carbonate solutions with promoters at elevated temperatures
… emission sources such as power plants. The Hot Carbonate Absorption Process with Crystallization Enabled High Pressure Stripping (Hot-CAP), which employs a concentrated potassium carbonate/bicarbonate (PCB) aqueous solution as a solvent and a potassium carbonate/bicarbonate slurry for CO2 …
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The effect of carbonate concentration in cyanide metal plating solutions
… of this study was to determine the effect of carbonate concentration in copper, cadmium, silver, and gold cyanide plating solutions on the properties of the deposits and the plating range. A 267 milliliter Hull cell was used to investigate this problem. By using this apparatus the …
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Carbon dioxide capture by chemical absorption : a solvent comparison study
… of three different solvents - monoethanolamine, potassium carbonate and chilled ammonia. In this thesis, comprehensive flow-sheet models have been built for each of the solvent systems, using ASPEN Plus as the modeling tool. In order to ensure an objective and consistent comparison of the …
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Investigação de redução da cristalinidade da celulose sob a influência de diferentes misturas eutéticas.
… chloride; lactic acid/glycine; glycerol/potassium carbonate and glycerol/betaine, over a period of 4 h at a temperature of 80ºC and molar ratios of 5:1 and 10:1. The celluloses obtained in the procedure were analyzed using various techniques, such as: Fourier transform infrared …
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Synthesis, properties, and modifications of engineering polymers
… aromatic substitution reactions using the potassium carbonate/N-methylpyrrolidone synthesis route. In particular, deuterated poly(arylene ether sulfones) were synthesized in order to investigate molecular motion via deuterium NMR. The mechanical, dynamic mechanical and fracture properties …
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Synthese neuartiger Sulfonimidamide zur Anwendung in der asymmetrischen Katalyse
… of stoichiometric amounts of copper(I) salt, potassium carbonate and aryliodides or -bromides. In the last part of the thesis the synthesis of prolyl sulfonimidamides is described and their applicability as potent organocatalysts in the solvent-free asymmetric aldol reaction has been …
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Synthesis of poly(arylene ether sulfone)-polyimide segmented copolymers
… by nucleophilic aromatic substitution using potassium carbonate as base and N-methyl pyrrolidinone (NMP) as solvent. m-Aminophenol was used as an endcapper to control the molecular weight of the oligomers and to provide functional amine termination. These amine terminated oligomers can then …
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Hemiaminals : a new chemotype for organocatalysis
… E1cB elimination using ethyl bromomalonate and potassium carbonate in acetonitrile. The reactions gave high yields (76-96%) and ees (83-95%) with a good chemoselectivity profile.
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Synthesis and basic characteristics of segmented poly(arylene ether sulfone)-poly(arylate) copolymers
… This reaction was conducted in the presence of potassium carbonate and anhydrous aprotic dipolar solvents. Poly(biphenol terephthalate) and poly(oxybenzoate) were synthesized in situ as the second, potentially anisotropic, sem;crystalline segment. These segmented copolymers were synthesized …
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Microfluidic encapsulation of carbon capture materials
… were created for the encapsulation of amine- and carbonate-rich solutions. Specifically, a flow-focusing microfluidic device was used to create double emulsions composed of a photocurable polymeric shell that surrounds an aqueous carbon dioxide absorbent core. After droplet formation, the shell …
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Synthesis and characterization of poly(arylene ether)s containing phosphorus, sulfur and heterocyclic pendant moieties
… ether) formation. The results demonstrate that potassium carbonate mediated step polymerizations likely proceed with etherification of one of the phenolic groups, prior to difunctional coupling, which can achieve high molecular weight. The formation of cyclic oligomers in the step-growth …
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Synthesis and characterization of phosphorus containing poly(arylene ether) systems
… with aromatic bisphenols in the presence of potassium carbonate and dipolar aprotic solvents. The resulting poly (arylene ether phosphine oxide) s had glass transition temperatures ranging from 195 to 285°C depending on the rigidity of the bisphenol and the pendant group on the phosphorus …
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Photodecarboxylative additions to phthalimides and their application in the synthesis of AKS-186 and its analogues
… acetone and in the presence of excess amounts of potassium carboxylates, the latter generated from the corresponding carboxylic acid and potassium carbonate. The evolution of carbon dioxide was tested using barium hydroxide solutions and was deemed positive when barium carbonate precipitation was …
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Synthesis and evaluation of polyol based biolubricants from vegetable oils
… achieved under the optimum condition of 1wt% potassium carbonate as the catalyst, 130 ºC reaction temperature, 18 h reaction time and a mole ratio of FAME to TMP of 3.9. In the third study, the oxidative stability index (OSI) of the original vegetable oil, FAME and product TMP esters were all …
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High temperature alkali corrosion kinetics of low expansion ceramics
… stabilized zirconia powders mixed with sodium or potassium carbonate were investigated. Observed phases as a function of composition, temperature and time are presented. Subsolidus phase equilibria in the soda-alumina-titania system were investigated and a tentative subsolidus ternary phase …
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Synthesis and characterization of novel macromolecules/networks via side chain modifications of amorphous poly(arylene ethers)
… as the azeotroping agent, and a slight excess of potassium carbonate as the weak base was the preferred methodology. The concentration of amines along the polymer backbone was successfully controlled by varying the ratio of 3-aminophenyl-bis(4-fluorophenyl)phosphine oxide monomer relative to the …
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Sorption-Enhanced Hydrogen Production from Catalytic Steam Gasification of Coal
… pellets were prepared with different contents of potassium carbonate and calcium oxide as the catalyst and sorbent, respectively. Experiments were performed on the steam gasification of two different types of coal with these pellets in a fixed-bed reactor. Boundary Dam lignite coal (low-rank coal) …
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