2 edition of effect of mineral species on oil shale char combustion and steam gasification found in the catalog.
effect of mineral species on oil shale char combustion and steam gasification
Ralph P. Cavalieri
Written in English
|Statement||by Ralph P. Cavalieri.|
|The Physical Object|
|Pagination||xxi, 313 leaves, bound :|
|Number of Pages||313|
Oil shale - Oil shale - Environmental issues: The production of oil from shales has a potentially serious impact on the environment. Four specific areas of concern dominate discussion regarding development of the resource: greenhouse gas output, water consumption and pollution, surface disturbance, and socioeconomic effects. Because oil and gas are produced by heating oil shale . This process could result in a strong upgrading effect on its derived product, such as bio-oil and bio-char (Shadangi and Mohanty ). Previous studies have demonstrated that co-pyrolysis of biomass with plastic results in an increase in bio-oil yield and an improvement in bio-oil quality (Onal et al. ).
An oil shale process is provided to retort oil shale and purify oil shale retort water. In the process, raw oil shale is retorted in an in situ underground retort or in an above ground retort to liberate shale oil, light hydrocarbon gases and oil shale retort water. The retort water is separated from the shale oil and gases in a sump or in a fractionator or quench tower followed by an API oil Cited by: Oil shale can be used as a fuel in thermal power plants, wherein oil shale is burnt like coal to drive the steam turbines. As of , there are oil shale-fired power plants in Estonia with a generating capacity of 2, megawatts (MW), China, and Germany. Also Israel, Romania and Russia have run oil shale-fired power plants, but have shut them down or switched to other .
Shale oil extraction is an industrial process for unconventional oil production. This process converts kerogen in oil shale into shale oil by pyrolysis, hydrogenation, or thermal resultant shale oil is used as fuel oil or upgraded to meet refinery feedstock specifications by adding hydrogen and removing sulfur and nitrogen impurities.. Shale oil Feedstock: Oil shale. Thermal Analysis of Co-Firing of Oil Shale and Biomass Fuels the blend. Co-firing also improves the combustion process of low-calorific fuels by blending them with fuels of higher calorific value . In the last decade, the utilization of biomass in co-firing systems has shown rapid development. Co-firing technology is presently performed.
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Effects of oil shale mineral composition on char combustion reactions Ralph P. Cavalier. and William J. Thomson Department of Chemical Engineering, Washington State University, Pullman, WashingtonUSA (Received 21 December ; revised 6 January ) Six powdered oil shales with differing mineral compositions were retorted and the resulting chars were subjected to isothermal combustion kinetic Cited by: 2.
Effect of mineral species on oil shale char combustion and steam gasification Thesis/Dissertation Cavalieri, R.P. Six oil shale samples with different mineral compositions were retorted identically and the resulting char was subjected to combustion kinetic studies using TGA techniques to determine what effect the various minerals which are present in the shale.
The presence of hydrogen has a strong inhibiting effect on the char gasification rate in H 2 O. For example, 30% hydrogen in the gasification atmosphere can reduce the gasification rate by a factor as high as 15 (Barrio et al., ).So an effective means of accelerating the water–gas reaction is continuous removal of hydrogen from the reaction site.
In order to develop the effective utilization of biomass, the gasification behavior (changes in gasification rates against conversion) of various chars prepared from biomass at 1,°C was studied. The gasification rate of char with CO2 measured at °C by a thermogravimetric balance was affected by the content of indigenous mineral matter such as Cited by: Underground gasification of oil shale Oil shale is a sedimentary rock of organic origin containing predominantly inorganic components and organic matter called kerogen.
Not to be confused with tight oil and gas, they may occur in oil shale and can be produced by fracturing and drilling the shale, whereas kerogen may be produced only by the Author: A. Reva, A. Blinderman.
Effects of Retorting Factors on Combustion Properties of Shale Char. The effect of mineral matrix in shale char on the pyrolysis and combustion of organic matter was explored by.
The current research involves characteristics of pyrolysis and thermo-oxidation of Estonian oil shale (OS) and its char. Non-isothermal and isothermal thermal analysis methods were used to characterise and compare the specifics of these processes under air and oxy-combustion conditions using Ar, CO2, O2 and their mixtures.
The study of reaction kinetics Cited by: 6. The gasification was catalyzed by the loaded iron regardless of its concentration, while the quickest at wt % where dispersion of iron-derived catalytic species in the char matrix was. Char gasification under steam is more complex than CO 2 gasification since the involvement of H 2, CO 2, and CO depends on the equilibrium of the WGS reaction (Eq.
Basically, the carbon-steam reaction mechanism involves two models: the oxygen exchange model and the hydrogen inhibition model. A reaction of major importance is the gasification and combustion of oil shale char, which supplies [Show full abstract] most of the energy necessary for the overall retorting process.
In. industry are the production of shale oil and gasification of oil shale . Inwood made almost 90% of the global energy use. However, the significance of wood fell rapidly and already in half of the energy was produced from coal.
By the share of. Char combustion is a much slower process than devolatilization, and it therefore determines the time for complete combustion in a furnace, which is on the order of a several seconds for pulverized coal at furnace temperatures. Studies have shown that the combustion of the char begins with chemisorption of oxygen at active sites on char surfaces, and that the.
The results indicate that oil shale ash has positive effect on char reactivity at the CO2 partial pressure of atm: the addition of oil shale ash by 30% to reed char lowered the reaction time.
In this work, we studied the effects of char structural evolution and alkali and alkaline earth metallic species (AAEMs) catalysis on the reactivity during the char gasification.
Investigation of Flash Pyrolysis of Kukersite Oil Shale Fig. Schematic diagram of the fast pyrolysis reactor. tions show, at such high degree of oil shale milling the main fuel mass is heated with the rate of the order of K/s, which allows to preserve the kerogen structure practically invariable up to reaction temperature.
High. Ind. Eng. Chem. Proc. Des. Dev. All Publications/Website. OR SEARCH CITATIONS. Numerical Investigation of the in Situ Oil Shale Pyrolysis Process by Superheated Steam Considering the Anisotropy of the Thermal, Hydraulic, and Mechanical Characteristics of Oil Shale Guoying Wang Dong Yang *.
Sandy-clay part in oil shale as received, % – – Organic part of oil shale as received, % – – Carbon content of oil shale as received, % – – The composition of oil shale is experimentally determined by the. This study investigated steam gasification of a woody biomass that had been upgraded by HTT at °C.
HTT removed 87–97% of AAEM species from the biomass. The char from the pyrolysis of the treated biomass underwent gasification, obeying first-order kinetics with respect to the mass of char over the entire range of by: This study reports the evolution of char structure during the steam gasification of biochars under chemical-reaction-controlled conditions.
Partially gasified samples were collected at various conversion levels during the steam gasification of both the raw biochars and the acid-treated biochars that had been prepared via acid-washing of the raw by:. The effect of chemical speciation (H 2 O/NH 4 Ac/HCl-soluble and insoluble) of alkali and alkaline earth metallic species on the steam gasification of sawdust biochar was investigated in a lab-scale, fixed-bed reactor, with the method of chemical fractionation analysis.
The changes in biochar structures and the evolution of biochar reactivity.Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons can be produced, called shale oil (not to be confused with tight oil—crude oil occurring naturally in shales).
Shale oil is a substitute for conventional crude oil; however, extracting shale oil from oil shale is more costly than the Primary: Kerogen, Quartz, Feldspar. Thermogravimetric analysis (TGA) of oil shale combustion was conducted in nitrogen-based gases at different oxygen concentrations (% ) and heating rates (1, 10, 30 and 50 K/min).
The authors modeled oil shale devolatilization and char combustion at different oxygen concentrations by using a discrete activation energy model.