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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 57 for “"activated carbons"”.
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Evaluation of different powdered activated carbons in the control of chlorite ion
Twelve different powdered activated carbons (PACs) were screened under laboratory conditions to determine their performance in the removal of chlorite ions (ClO₂⁻) and in the production of chloride ions (Cl⁻) and chlorate ions (ClO₃⁻) during that removal. All screenings were conducted in reagent …
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Synthesis and characterization of chemically treated activated carbons for adsorption of trace contaminants
… purpose is the use of dry adsorbents such as activated carbons.
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SELECTIVE ADSORPTION OF DIBENZOTHIOPHENES ON ACTIVATED CARBONS WITH METAL SPECIES DEPOSITED ON THEIR SURFACES
"The objective of this thesis is an investigation of influence of porosity, surface chemistry, material composition and effects of metals oncarbon adsorbents in desulfurization of liquid fuels. Materials are derived from poly (4-styrenesulfonic acid-co-maleic acid) salts (sodium or transition …
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Effect of pH on adsorption and desorption equilibria and kinetics of 2-nitrophenol and phenol onto two activated carbons.
… phenol as organic pollutants and F-400 and WV-B carbons as adsorbents. The batch adsorption isotherms study showed that at pHs less than pK$\rm\sb{a}$ (undissociated form of compounds), 2NP and phenol adsorption was markedly higher than at pHs greater than pK$\rm\sb{a}$ (dissociated form of …
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The Comparative Study between the Adsorptive Capacity of Activated Carbon Obtained from the Enhanced Hydrothermal Polymerization Process with Conventional Activated Carbons in the Removal of Micropollutants of Concern
… popular adsorbents used towards adsorption is activated carbon. However, due to the high cost of the conventional commercial activated carbon (produced from coal, which is a finite resource), it is important to find alternative precursors that are readily available, low cost, and can …
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Sudaki fenolik kirleticilerin farklı adsorplayıcılara adsorpsiyonu ve katının mikrodalga rejenerasyonu
… of phenolic pollutant in water on commercial activated carbon and biomass-based activated carbon and regeneration of saturated activated carbons with microwave energy that it has common use field in recent years. In this study, the first step is demineralisation of the waste tea collected from …
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Carbon Dioxide Capture: Using Activated Carbon From Chicken Waste
… 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 carbon (AC) is being investigated and developed for CO2 capture. Chicken waste, which is produced in large quantity in U.S., is …
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The development and characterization of tailored, high surface area adsorbents for enhanced adsorption
In the 1970's, the first activated carbon fibers(ACFs) were developed from phenolic precursors by Economy et al. These fibers addressed the serious limitations of ACGs and possessed excellent contact efficiency (fast adsorption/desorption kinetics), high surface area, narrow micropore size …
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Removal of disinfection by-product precursors by activated carbon and MIEX(R)
… research was to investigate NOM removal with activated carbon and MIEX(R). Hydrophilic (HPI), hydrophobic (HPO), and transphilic (TPI) NOM was fractionated and subsequent DBP formation from these fractions was studied. Several new adsorptive materials (greensand, carbon nanotubes, iron …
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Removal of Naphthenic Acid from Water Using Biomass-based Activated Carbon
… removal of naphthenic acids by adsorption using activated carbon was investigated since among a variety of adsorbents, activated carbon is considered to be highly effective. Sawdust was selected as the raw material for producing activated carbon due to its abundance and anticipated low cost. In …
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Biyokütle temelli aktif karbonların elektrokimyasal çift tabaka kapasitörlerde elektrot malzemesi olarak kullanımı
… materials due to their high surface area. Activatedcarbons produced from natural materials such as biomasses are the most attractive option to use as theelectrode materials among all carbonaceous materials. An activated carbon electrode with highcapacitance is ideal for applications; this …
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Studies on the Degradation of Desiccants in Temperature Swing Adsorption Processes and the Adsorptive Separation of Sulfur Compounds from Industrial Fluids
… One of the most promising adsorbents is activated carbon for removing CO2, H2S, and SO2. A custom-built rapid cycling adsorption apparatus was used to test zeolites 4A and 13X, and three different pore-size silica gels to elucidate what factors of industrial dehydration systems would …
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Aprovechamiento integral de residuos sólidos de curtición. Implicaciones medioambientales
… for the valorization of tanning solid waste into activated carbons with environmental applications on gaseous emissions, studying the energy use of the fractions generated during the pyrolysis of the precursor. This thesis is part of a PETRI project: ¿Aprovechamiento integral de residuos sólidos …
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Preparation, Evaluation and Structural Modeling of Carbon-Based Adsorbents Used on Natural Gas Vehicles
Activated carbon adsorbents are widely used in the chemical and environmental industries due to their large surface areas and strong ability to adsorb gases and liquids. In this study, activated carbons are prepared from low cost materials, and their application in natural gas storage is …
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Graphene Oxide Assisted Hydrothermal Carbonization of Corn Fibre for High-Quality Activated Carbon and its Application for Water Purification using Rapid Small-Scale Column Testing
… biomass waste streams and produce high-value biocarbons. Studies are needed which elucidate the influence of different process variables to enhance bio-carbon properties and further improve their performance. In this sense, this work first provided a thorough characterization of novel activated …
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Development of a Predictive and Mechanistic Model for Capacitive Deionization
… with pore geometry was applied to six model activated carbons (MACs) of uniform pore size to analyze the effect of influent salt concentration, pore size and geometry, and applied voltage on ion removal. The general trends found in modeling results were consistent with data presented in the …
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Understanding and enhancing multi-pollutant control using carbon-based materials
… applications, was investigated. Catalytic carbons were prepared via ultrasonic spray pyrolysis and potential applications for these materials were proposed. Next, activated carbons were tested as catalysts for NO oxidation and adsorbents for toxic industrial chemicals, including HCN. The …
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The Borexino experiment : test of the purification systems and data analysis in the Counting Test Facility
… the study of the adsorption technique based on activated carbons for removing krypton from nitrogen and to the investigation of the purity of nitrogen available on the market. I analyzed the data from the third campaign of the Borexino prototype detector, the Counting Test Facility (CTF), to …
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Adsorption Performance and Cold Plasma Activation of Biochar for On-Site CH₄ Storage and Energy Recovery in Oil Fields
… and compared against that of three commercial activated carbons. While the pristine biochars exhibited adsorption capacities at least 50% lower than those of the tested activated carbons, they demonstrated more than twice the CH₄ storage capacity of compressed natural gas (CNG) at equivalent …
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