Search results for "ammonium"

showing 10 items of 1070 documents

Performance of a RED system with ammonium hydrogen carbonate solutions

2016

The use of closed-loop salinity gradient power (SGP) technologies has been recently presented as a viable option to generate power using low-grade heat, by coupling a SGP unit with a thermally-driven regeneration process in a closed loop where artificial solutions can be adopted for the conversion of heat into power. Among these, the closed-loop reverse electrodialysis (RED) process presents a number of advantages such as the direct production of electricity, the extreme flexibility in operating conditions and the recently demonstrated large potentials for industrial scale-up. Ammonium hydrogen carbonate (NH4HCO3) is a salt suitable for such closed-loop RED process thanks to its particular …

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciSettore ING-IND/25 - Impianti ChimiciMechanical engineeringSalt (chemistry)Ocean Engineering02 engineering and technology010501 environmental sciences7. Clean energy01 natural sciencesHeat-to-powerPhase (matter)Waste heatReversed electrodialysisReverse electrodialysiOsmotic powerSalinity gradient powerProcess engineeringAmmonium hydrogen carbonate0105 earth and related environmental sciencesWater Science and Technologychemistry.chemical_classificationSettore ING-IND/24 - Principi Di Ingegneria Chimicabusiness.industry021001 nanoscience & nanotechnologyPollution6. Clean waterPower (physics)Reverse Electrodialysis Salinity Gradient Power SGP heat engine Waste heat Ammonium hydrogen carbonateElectricity generationchemistryScientific method0210 nano-technologybusinessAmmonium hydrogen carbonate; Heat engine; Heat-to-power; Reverse electrodialysis; Salinity gradient powerHeat engine
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Reverse electrodialysis with NH4HCO3-water systems for heat-to-power conversion

2017

Abstract A Reverse ElectroDialysis Heat Engine (REDHE) system operating with “thermolytic” ammonium hydrogen-carbonate (NH4HCO3) aqueous solutions as working fluids is studied. The engine is constituted by (i) a RED unit to produce electric power by mixing the solutions at different salinity and (ii) a thermally-driven regeneration unit including a stripping and an absorption column to restore the initial salinity gradient thus closing the cycle. In the present work only the RED unit and the stripping column are taken into account. In particular, a simplified integrated process model for the whole cycle was developed: it consists of (i) a lumped parameter model for the RED unit validated wi…

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciStripping (chemistry)Salinity gradient power (SGP)020209 energyAnalytical chemistry02 engineering and technology7. Clean energyThermolytic saltIndustrial and Manufacturing EngineeringWaste heat recovery unitReversed electrodialysisThermal0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringClosed-loop reverse electrodialysiWaste heat recoveryAmmonium hydrogen carbonateCivil and Structural EngineeringPower densityHeat engineWaste managementChemistryMechanical EngineeringAmmonium hydrogen carbonate; Closed-loop reverse electrodialysis; Reverse ElectroDialysis Heat Engine (REDHE); Salinity gradient power (SGP); Thermolytic salts; Waste heat recovery; Civil and Structural Engineering; Building and Construction; Pollution; Energy (all); Mechanical Engineering; Industrial and Manufacturing Engineering; Electrical and Electronic EngineeringBuilding and ConstructionElectrodialysis021001 nanoscience & nanotechnologyPollution6. Clean waterEnergy (all)General EnergyReverse ElectroDialysis Heat Engine (REDHE)Electric power0210 nano-technology
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Resistance to disinfection of a polymicrobial association contaminating the surface of elastomeric dental impressions.

2009

The aim of this study was to evaluate the ability to resist disinfection of a polymicrobial association contaminating the surface of dental impressions obtained with two different elastomers: a polyether (Impregum) and an addition-polymerized silicone (Elite). Impressions were contaminated with a mixture of three biofilm-forming microorganisms (Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans) and disinfected immediately after contamination, or after microbial layers were allowed to develop during a six-hour storage. Two commercial disinfectants were tested: MD 520 containing 0.5% glutaraldehyde and Sterigum Powder without glutaraldehyde. Residual contamination was recover…

Settore MED/07 - Microbiologia E Microbiologia ClinicaStaphylococcus aureusPolyether Addition-polymerized silicone Glutaraldehyde Quaternary ammonium compounds DisinfectionDental Impression MaterialsColony Count MicrobialDental DisinfectantsDisinfectionQuaternary Ammonium CompoundsResins SyntheticSettore MED/28 - Malattie OdontostomatologicheGlutaralBiofilmsCandida albicansMaterials TestingPseudomonas aeruginosaSilicone ElastomersEquipment Contamination
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Biological Nutrient Removal Model No. 2 (BNRM2): a general model for wastewater treatment plants

2013

This paper presents the plant-wide model Biological Nutrient Removal Model No. 2 (BNRM2). Since nitrite was not considered in the BNRM1, and this previous model also failed to accurately simulate the anaerobic digestion because precipitation processes were not considered, an extension of BNRM1 has been developed. This extension comprises all the components and processes required to simulate nitrogen removal via nitrite and the formation of the solids most likely to precipitate in anaerobic digesters. The solids considered in BNRM2 are: struvite, amorphous calcium phosphate, hidroxyapatite, newberite, vivianite, strengite, variscite, and calcium carbonate. With regard to nitrogen removal via…

Simulación y diseño de estaciones de tratamiento de aguas residuales 32484 / W - Programa de doctorado en ingeniería del agua y medioambiental 2077Simulación y diseño de estaciones de tratamiento de aguas residuales 32484 / X - Máster universitario en ingeniería hidráulica y medio ambiente 2152Environmental EngineeringNitritePrecipitationWater PurificationStrengitechemistry.chemical_compoundBioreactorsBNRM1BioreactorChemical PrecipitationSimulación y diseño de estaciones de tratamiento de aguas residuales 32484 / W - Programa de doctorado en ingeniería del agua y medioambiental 2218Computer SimulationAmmoniumNitriteTECNOLOGIA DEL MEDIO AMBIENTENitritesWater Science and TechnologyChemistryEnvironmental engineeringModels TheoreticalPulp and paper industryActivated sludge modelsKineticsAnaerobic digestionActivated sludgeStruvitePlant-wide mathematical modellingSewage treatmentWater Science and Technology
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Enhanced catalytic electrochemical reduction of dissolved oxygen with ultracleancucurbituril[7]-capped gold nanoparticles

2014

Gold nanoparticles capped with cucurbituril[7] have been prepared in the absence of metallic cations and organic ligands. Remarkably, these nanohybrids encapsulate dissolved oxygen and are highly active in electrochemical reduction. The effect of the presence of sodium and ammonium salts on this catalysed process is also analysed.

SodiumInorganic chemistrychemistry.chemical_elementElectrochemistryCatalysisMetalchemistry.chemical_compoundchemistryColloidal goldCucurbiturilvisual_artvisual_art.visual_art_mediumGeneral Materials ScienceAmmonium
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CCDC 652541: Experimental Crystal Structure Determination

2008

Related Article: H.Sopo, A.Lehtonen, R.Sillanpaa|2008|Polyhedron|27|95|doi:10.1016/j.poly.2007.08.047

Space GroupCrystallography((2-(bis(2-oxy-35-dimethylbenzyl)amino)ethyl)(dimethyl)ammonium NOO')-(nitrato-OO')-dioxo-uranium(vi) acetonitrile solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 892348: Experimental Crystal Structure Determination

2013

Related Article: S.J.Moore, C.J.E.Haynes, J.Gonzalez, J.L.Sutton, S.J.Brooks, M.E.Light, J.Herniman, G.J.Langley, V.Soto-Cerrato, R.Perez-Tomas, I.Marques, P.J.Costa, V.Felix, P.A.Gale|2013|Chemical Science|4|103|doi:10.1039/c2sc21112b

Space GroupCrystallography11'-(12-Phenylene)bis(3-(3-nitrophenyl)urea) tetraethylammonium hemikis(carbonate)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1574958: Experimental Crystal Structure Determination

2018

Related Article: Qingong Li, Kun Zhao, Anssi Peuronen, Kari Rissanen, Dieter Enders, Yefeng Tang|2018|J.Am.Chem.Soc.|140|1937|doi:10.1021/jacs.7b12903

Space GroupCrystallography2-[(24-diethyl-5-oxo-25-dihydrofuran-2-yl)methyl]-N-(1-phenylethyl)butylammonium chlorideCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 149029: Experimental Crystal Structure Determination

2001

Related Article: A.Shivanyuk, M.Saadioui, F.Broda, I.Thondorf, M.O.Vysotsky, K.Rissanen, E.Kolehmainen, V.Bohmer|2004|Chem.-Eur.J.|10|2138|doi:10.1002/chem.200305633

Space GroupCrystallography46101216182224-Octahydroxy-281420-tetramethylcalix(4)arene bis(triethylammonium) dichloride clathrate acetonitrile solvate monohydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 149022: Experimental Crystal Structure Determination

2001

Related Article: A.Shivanyuk, M.Saadioui, F.Broda, I.Thondorf, M.O.Vysotsky, K.Rissanen, E.Kolehmainen, V.Bohmer|2004|Chem.-Eur.J.|10|2138|doi:10.1002/chem.200305633

Space GroupCrystallography461618-Tetrahydroxy-10122224-tetrakis(p-tolylsulfonyloxy)-281420-tetraethylcalix(4)arene bis(triethylammonium) dichloride clathrate acetonitrile solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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