Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 26 for “"Carbonaceous material"”.
-
Quantitative geometric model of connected carbonaceous material in mudrocks
… rocks. Recent observations of nanopores within carbonaceous material in mudrocks have led to the hypothesis that such material provides conduits for gas migration within the mudrock matrix. This hypothesis requires that the carbonaceous material exist not as isolated grains but as connected …
-
Catalytic reduction of nitric oxide by solid carbonaceous material under lean condition
… reduction of nitric oxide (NO) with solid carbonaceous materials to N_2 was also investigated over palladium based catalysts. Catalysts consisting of 4 wt.% Palladium on CeO_2, A1203 and TiO_2, prepared by the impregnation method, were evaluated as lean NO_x control catalysts with granular …
-
The Contribution of Different Carbonaceous Material Fractions to the Sorption of Hydrophobic Organic Contaminants to Subsurface Sediments
… Illinois, in order to obtain fractions of these materials enriched in one or more of the CM fractions. The results indicate that water/acid soluble organic matters dominate total carbon mass, with kerogen/humin the next most abundant CMs. Isotherm results indicate that condensed form CMs, most …
-
The geometry of some Beaufort group sandstones and its relationship to uranium mineralisation
… generated by reduction of uranyl carbonates on carbonaceous material. The carbonaceous material must however be lying closely below or within a weak REDOX front, since it is vital to transport complexes in an oxidising environment, and yet such an environment will not allow reduced uranium to be …
-
Modelagem de tratamento biológico de esgotos em reator batelada sequencial
… including the two phases of treatment - carbonaceous material and nitrification. A computer simulation of the treatment is used to predict the behaviour of the main system parameters. The study focus the influence of filling time, incoming organic load, microorganism concentration and …
-
The gold absorption properties of shaly material from Beatrix Gold Mine
Shaly material from Beatrix Gold Mine has been found to be capable of adsorbing gold from cyanide solutions. Black shale bands occur in the reef zone at Beatrix Mine, but because of the mode of occurrence of the shale bands selective mining cannot be practised and ore delivered to the plant is …
-
Modelling and simulation of fluidized-bed boilers and gasifiers for carbonaceous solids.
… (c) Solid compositions of the coal (or any other carbonaceous material), limestone and inert in the bed and throughout the freeboard. The considered components are: C, H, 0, N, S, ash, volatiles, moisture in the coal, CaCO3, CaO, CaSO4 , moisture in the limestone, Si0 2 , and moisture in the …
-
Anodic alcohol fuel cell reactions at platinum active sites on doped metal oxide supports
… investigated to replace carbon as a supporting material in alcohol fuel cells. In an alkaline environment, Pt/TOMS displayed faster kinetics and less poisoning during the methanol and ethanol oxidation reactions compared to the commercial Pt/C. When compared in an acidic ethanol and methanol …
-
Pressure, temperature, and stress conditions of Southern Alpine Fault (New Zealand) mylonites
… thermobarometry and Raman Spectroscopy of Carbonaceous Material (RSCM) indicate mylonitization occurred at 390 – 495 °C, somewhat cooler than observed along the central Alpine Fault. Given similar bulk compositions, and no known variation in strain rate along strike, it is likely that these …
-
Investigation of biological phosphorus removal for the treatment of a cellulose acetate manufacturing wastewater
… wastewater. Effective utilization or removal of carbonaceous material as measured by Chemical Oxygen Demand (COD) was attained, but BPR was not achieved. Other advantages of BPR and its anaerobic-aerobic sequencing were also monitored. While the loading on the aerobic zone was reduced 10 to 20% …
-
Effect of Iron on the Oxidative Capacity of Carbonaceous Nanoparticles
… of these detrimental effects. Trace metals and carbonaceous material of the nanometer-sized particles contained in PM<sub>2.5 </sub>have been implicated as key players in causing these effects. Here, the role of Fe is investigated with carbonaceous nanoparticles (CNP) while mimicking simple …
-
Kinetics of the activated sludge process
… setting up a model describing the kinetics of carbonaceous material degradation. This model forms the foundation on which denitrification and biological excess phosphorus removal are readily grafted; understanding of the carbonaceous degradation model facilitates understanding of the other two …
-
Chemistry of carbonaceous aerosols : studies of atmospheric processing and OH-initiated oxidation
Carbonaceous aerosols are among the most prevalent yet least understood constituents of the atmosphere, particularly in urban environments. We have performed analyses of field samples and laboratory studies to probe the physico-chemical properties of soot and organic aerosols in a complimentary …
-
Carbon Chemistry Of Giant Impacts
… The admixture of presumably carbonate derived carbonaceous material is suggested to account for the <sup>13</sup>C-enriched δ<sup>13</sup>C compositions encountered in whole-rock suevites known to include carbonate melts. On the basis of morphology. mineralogical associations diamond/graphite …
-
The chlorination of midlothian coal to produce a liquid adsorbent active carbon
… preparation of active carbons from many kinds of carbonaceous material have been described in the literature. Many processes of activation for many different raw materials are used to obtain active carbons for specific purposes. In general, all of these processes involve a low temperature …
-
Síntese e caracterização de nanopartículas de óxidos de ferro e sua mistura com resíduos da cana-de-açúcar (bagaço e palha) para emprego nos processos de adsorção e fotocatálise heterogênea
… mainly due to the shorter reaction time, lower material consumption and production of nanometer-scale iron oxides. In this context, the combination of the characteristics of these materials with those of agro-industrial waste, such as sugarcane bagasse and straw; it can result in a new material …
-
Development of low-cost sensing and separation devices based on macro, micro and nano technology for health applications
… however, the introduction of new types of materials, such as plastics, offered a new way for fast prototyping and the development of disposable devices. One such microfluidic device is based on the lamination of laser-printed polyester films using a computer, printer and laminator. The …
-
Constraints on the surface composition of Trojan asteroidsfrom near infrared (0.8-4.0 μm) spectroscopy and spectral modeling
… with mixtures of anhydrous silicates and carbonaceous material. Upper limits are placed on the amount of water ice and hydrated silicates present on the surfaces. Similar analysis is performed for several other groups of dark solar system objects. Comparison of these results with those for …
-
Contributions to Exceptional Fossil Preservation
… diagenetic, and weathering processes) and carbonaceous materials replicating exceptionally preserved fossils. The third chapter examines the causes of preservational variations observed among organophosphatic tubular shelly Sphenothallus fossils in the lower Cambrian of South China using an …
Page 1 of 2