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 16 of 16 for “"carbon formation"”.
-
Carbon formation on metal carbides in chlorine-containing gases at high temperature.
Carbon formation on metal carbides in chlorine-containing gases at high temperature.
-
Investigation of the Relationship of Ignition Delay Characteristics of a Hydrocarbon Fuel to Carbon Formation
Made available in DSpace on 2014-12-05T19:16:03Z (GMT). No. of bitstreams: 1 6402871.pdf: 1964960 bytes, checksum: 33ed561c2fd678f0e6e178e6eff60e7e (MD5) Previous issue date: 1963
-
Control of balance of plant components for solid oxide fuel cell systems with sensitivity to carbon formation
… the fuel cell stack. In order to ensure that carbon does not build up and degrade the system some form of fuel preprocessing is required. To move air and fuel through the system, blowers and valves must be used. Additionally during system start up, a method for pre-heating the fuel cell to …
-
The effect of feed rate and cracking time on carbon formation during the catalytic cracking of petroleum hydrocarbons
… process of catalytic cracking of petroleum hydrocarbons invariably produces a carbonaceous deposit on the surface of the solid catalyst which serves to reduce the activity of the catalyst. This investigation was undertaken to determine the effect of the feed rate and the length of the cracking …
-
Computational heterogeneous catalysis applied to steam methane reforming over nickel and nickel/silver catalysts
… of SMR over nickel can be severely hindered by carbon formation, which leads to the deactivation or even destruction of the catalyst particles. Thus, there is significant interest in catalysts that inhibit carbon formation yet retain activity to SMR. In order to develop improved catalysts for …
-
The suitability of Ni-Co catalysts in the dry reforming reaction
… is because dry reforming combines methane and carbon dioxide which are both greenhouse gases into synthesis gas which is used in the production of synthetic fuels and chemicals. The main problem faced by the dry reforming reaction is the formation carbon which causes catalyst deactivation. …
-
CO2 Derived Carbon Capture Using Microalgae in a PhotoBioCREC Unit
Microalgae has the potential to contribute to carbon dioxide capture, resulting in the production of alternative fuels and valuable chemical products. To accomplish this, high-efficiency photobioreactors must be conceptualized, designed, and established, in order to achieve high inorganic carbon …
-
Catalytic Reforming of Biogas for Syngas Production
Biogas is a mixture of methane and carbon dioxide produced from the anaerobic microbial digestion of biomass. It is an inexpensive, local source of energy but is usually wasted because the CO₂ content dilutes the quality of the fuel. Dry and auto-thermal reforming are catalytic methods that convert …
-
Development and characterization of an impedance-based carbon sensor for the detection of catalyst coking in steam-methane and dry-methane reforming systems
A carbon sensor designed to detect the early stages of catalyst coking in methane reforming systems has been developed. The sensor is similar to the one developed by Wheeler et al., but it has been redesigned to reduce unwanted gas-phase response and increase coking response in methane reforming …
-
Effects of Litter Production, Biochemistry and Plant Community Composition on Carbon and Nutrient Cycling under Elevated Carbon Dioxide and Tropospheric Ozone.
… controlling nutrient release rates and soil carbon formation. To assess those effects, leaf litter was collected from aspen (Populus tremuloides Michx) and birch (Betula papyrifera Marsh) communities in 2003 at Aspen Free-Air Carbon Dioxide Enrichment experiment in Rhinelander, WI. A 935 day …
-
Research and development of nickel based catalysts for carbon dioxide reforming of methane
Consuming two major greenhouse gases, carbon dioxide (CO2) and methane (CH4), to produce synthesis gas, which is a mixture of carbon monoxide (CO) and hydrogen (H2), CO2 reforming of CH4 shows significant environmental and economic benefits. However, the process has not found wide industrial …
-
Carbon deposition on transition metal- and uranium-oxides
… chemical performance in the conditions present. Carbon deposition on boiler and fuel pin heat transfer surfaces affects a reactor's efficiency and may necessitate downrating to maintain safety margins. This is believed to arise from decomposition of some of the coolant gas constituents. …
-
The oxidative reforming of methane to synthesis gas on a commercial steam reforming catalyst
… oxidative reforming of methane to predominantly carbon monoxide and hydrogen was studied over a commercial steam reforming catalyst. The said reaction was performed in an integral fixed-bed reactor at temperatures between 575°C and 650°C at a total pressure of 200 kPa(a). The primary objective of …
-
Radio frequency plasma synthesis of ultrafine titanium carbide powders
… TiO2 feed particles and largely amorphous free carbon particles ranging from 8 to 40 nm were always observed. The crystallinity of the free carbon particles increased while the extractable content decreased when the natural gas was injected upstream of the plasma. This indicated that the …
-
Phase and structural changes of nickel catalysts as a function of reaction conditions
Carbon dioxide hydrogenation is a route for the production of methane from hydrogen and carbon dioxide, which has attracted increased attention in recent times. It provides a means for both energy storage through substitute natural gas (SNG) production and as a process for the conversion of carbon …