Results 71 to 80 of about 120 (105)
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NICKEL SPECIATION IN ASPHALTITE BOTTOM ASH
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2017Asphaltites derive from petroleum origin. The combustion of asphaltites produces fly and bottom ashes that are characterized by a high content of valuable elements such as vanadium, nickel, molybdenum, uranium, thorium, sulfur and unburnt carbon [1].
Aydin F., Kavak O., Fidan C., Aydin I.
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Rheological Properties of Asphaltite−Water Slurries
Energy & Fuels, 2006In this study, the rheological characteristics of asphaltite−water slurries (AWSs) were investigated with respect to some of the most important parameters in the preparation of slurries. The effects of pulp density, chemical addition, pulp pH, and particle size on the rheological behavior and viscosity of AWSs were studied. The role of demineralization
HİÇYILMAZ, Cahit +2 more
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Asphaltites: Composition and Conversion
1995Turkey has insignificant reserves of crude oil and natural gas. Consequently, the amount of foreign currency spent on importation of petroleum and electricity is equivalent to the total exportation from the country. The increasing trend in crude oil prices, is an important threat to the industrialisation of Turkey.
Y. Yurum, E. Ekinci
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High-sulfur asphaltites of Argentina
Solid Fuel Chemistry, 2007The results of advanced study of the chemical nature of asphaltites from Rafaelita and Toribia fields, as well as the composition and structural features of their malthene, asphaltene-carbene, and carboid components are presented. It was found that the structural units in the molecules of isolated compounds are primarily based on fused tetra-and ...
V. V. Savel’ev +4 more
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Thermal liquefaction of natural asphaltites
Solid Fuel Chemistry, 2007Thermal transformations of high-sulfur asphaltites of Argentina were studied over a wide range of their heat treatment conditions: the final heating temperature from 350 to 600°C, the nature of the solvent used (water, deacon, tetragon, straight-run petroleum diesel distillates, the process mode (batch or flow), and the presence of a catalyst.
V. V. Savel’ev +4 more
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Selective oil agglomeration in Sırnak asphaltite beneficiation
Fuel, 2004Abstract In this study, the possibility of cleaning Sirnak asphaltite by the agglomeration method was investigated. Experimental studies were conducted on the asphaltite sample with ash, sulphur, volatile matter and fixed carbon contents of 44.8, 6.0, 38.0, and 17.2 wt%, respectively. For this purpose, laboratory tests were carried out to investigate
Abakay, H, Ayhan, FD, Kahraman, F
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A kinetic investigation on the pyrolysis of Seguruk asphaltite
Journal of Thermal Analysis and Calorimetry, 2008The pyrolysis of Seguruk asphaltite has been investigated using thermogravimetric analysis at atmospheric pressure between 293 to 1223 K at different linear heating rates of 5, 10 and 20 K min−1 under nitrogen as ambient gas. There was a two-stage thermal decomposition. Thermal decomposition started around 630 K for stage 1 for the slowest heating rate.
Tonbul, Y. +3 more
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Thermal destruction of asphaltites in supercritical fluids
Russian Journal of Physical Chemistry B, 2010The processes of thermal destruction of asphaltites recovered from the Rafaelita and Toribia deposits in the presence of water, benzene, tetralin, and ethanol in the supercritical state are studied. The solvent nature plays an important role in the thermal destruction, with the maximum conversion (99 wt %) of both asphaltites into liquid products being
V. V. Saveliev, A. K. Golovko
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Fast Pyrolysis of Şırnak Asphaltite (Turkey) and Characterization of Pyrolysis Products
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2008Abstract Fast pyrolysis of Sirnak Asphaltite (SASP) was investigated to determine yield and distribution of volatile products at different temperatures. A special sampling technique was used for collecting organic products formed at different time intervals and pyrolysis temperatures.
Sert, M. +4 more
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Producing adsorbents from nitrated asphaltites
Chemistry and Technology of Fuels and Oils, 2012Carbon adsorbents with mechanical strengths of 90-93% and a micropore volume of 0.16-0.3 cm3/cm3 have been obtained from nitrated asphaltites by the existing industrial technology. Compared to industrial carbon with the trademark KAD-iodine, medium-charred specimens are highly selective in extracting gold and silver from multicomponent polymetal ...
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