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Showing 1 to 20 of 336 for “"activated carbon"”.
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Biological regeneration of activated carbon
… from an artificial wastewater in the absence of activated carbon. The data collected during this fermentation were logged on a PDP 11/40 minicomputer. Variables such as oxygen and carbon dioxide percent by volume evolved, the dissolved oxygen concentration, temperature, pH and volumetric air flow …
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Activated Carbon from North Dakota Lignite
<p>Activated carbon was produced by reacting lignite char with steam in a fluidized-bed reactor which was designed and constructed for this study. Effects of three variables temperature, residence time and particle size, at four levels were studied statistically using a Latin square design. When …
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Chemical modification of activated carbon adsorbents
Activated carbons have been modif fed using reactive chemicals to produce adsorbents of enhanced hydrophobic character which will also be resistant to surface oxidation that results from exposure to humid air ("ageing"). The intention was that modification would not disrupt the carbon pore …
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Humic Substances Removal by Activated Carbon
… the removal of humic substances by various activated carbons. Different analytical methods were investigated to determine humic substances as possible indicators of chloroform formation potential. Total organic carbon measurement and ultraviolet/visible absorbance correlate well with the …
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Activated Carbon Preparation and Modification for Adsorption
… substances, such as polymer resin and zeolite or activated carbon, to biobutanol fermentatioon broth did not achieve energy efficient separation of butanol due to low adsorption selectivity and fouling in broth. Gas-stripping - condensation is another new butanol recovery method, however, the …
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Activated carbon catalyzed nitrosamine formation via amine nitrosation
… concerning the catalysis of amine nitrosation by activated carbon materials whose use is widespread in municipal and industrial systems. Experimental results show that this catalysis is highly pH dependent, with maximum formation achieved near the pKa value for each of the secondary amines tested. …
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Carbon Dioxide Capture: Using Activated Carbon From Chicken Waste
Carbon Dioxide (CO2) emission from hydrocarbon fuel combustion is becoming a serious concern because it is the main contributor to greenhouse gas which causes global warming. Activated carbon sorbents have been used widely in various gas-phase and/or liquid-phase separation. Currently activated …
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The Production of Activated Carbon from North Dakota Lignite
<p>The feasibility of producing activated carbon from lignite using a fluid bed reactor was investigated. Steam was used as the activating agent and was- reacted with carbonized lignite at elevated temperatures. The reaction was performed in a fluidized bed type reactor 1 l/2" in diameter and 24" …
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The modification of activated carbon cloth by alumina deposition
The impregnation of mesoporous carbon cloth with alumina has been studied. The most successful method of impregnation resulted from preparation of the alumina phase by a sol/gel route. This method involves a boehmite intermediate, and the heating environment for the thermal transition of boehmite …
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Radon Adsorption on Activated Carbon for Indoor Radon Control
Made available in DSpace on 2017-07-06T18:42:28Z (GMT). No. of bitstreams: 3 Bocanegra_Reynaldo_MS.pdf: 32138579 bytes, checksum: b2226bf7e1d35c9ebbb11416297da063 (MD5) Bocanegra_Reynaldo_MS_ABS.pdf: 945816 bytes, checksum: 333c44dba0f132ffc478704a62c3bb52 (MD5) license.txt: 4813 bytes, checksum: …
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Modeling Powdered Activated Carbon Performance in Membrane Filtration Systems
… results of this study showed that, for a given carbon dose, the application of carbon as a pulse input always yields lower adsorbate concentrations in the membrane permeate. Furthermore, application of the activated carbon to continuous-flow reactors installed upstream of the membranes, and the …
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Reduction of Aqueous Free Chlorine With Granular Activated Carbon
Made available in DSpace on 2014-12-13T19:31:24Z (GMT). No. of bitstreams: 1 7606980.pdf: 3584396 bytes, checksum: 054ad3e673c183d0862395564efc5231 (MD5) Previous issue date: 1975
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Evaluation of Kaolinite and activated carbon performance for CO2 capture
Submitted in fulfilment of the requirements for the degree of Master of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2021.
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Activated Carbon Injection for Mercury Control in Coal-Fired Boilers
… it will remain an environmental concern.</p> <p>Activated carbon (AC) injection is a proposed technology for mercury control in coal-fired boilers. We are interested in determining whether the diffusion rate or the absorptive capacity of the sorbent particle limits mercury absorption. A …
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Abiotic and Biotic Perchlorate Removal in an Activated Carbon Filter
This research has demonstrated that, while abiotic perchlorate removal by GAC is ineffective, BAC filtration can provide efficient, sustained perchlorate removal under a broad range of operating conditions and water quality characteristics.
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The reduction of bromate in drinking water by activated carbon
… drinking water has been studied. Both granular activated carbon and powdered activated carbon have been used to reduce bromate. Solution characteristics which influenced the reduction of bromate during this study include solution pH, initial bromate concentration, ionic strength of the solution, …
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Microwave-assisted pyrolysis of HDPE using an activated carbon bed
… breaking down polymers into useful smaller hydrocarbons using microwave heat in the absence of oxygen. This dissertation examines the use of a catalytic activated carbon bed in this procedure, using high density polyethylene (HDPE) as a model plastic. Initial tests with the batch input of HDPE …
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