Results 111 to 120 of about 880 (135)
Some of the next articles are maybe not open access.
Minacar asphaltite: an asphaltite from Argentina
Fuel, 1972Abstract Minacar asphaltite, an asphaltic pyrobitumen or fossilized asphalt, has interesting characteristics. Its provenance, physical and chemical properties, analyses, ash characteristics, solvent extraction, carbonization products, and possibilities for improving the coke made from it are outlined.
openaire +1 more source
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
openaire +1 more source
CHROMIUM AND THALLIUM IN TURKISH ASPHALTITE SAMPLE
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2017Asphaltite derives from petroleum origin solid fossil fuel [1]. It contains valuable elements such as chromium, thallium molybdenum, uranium etc. Chromium and thallium are very important elements both environmental and health. Chromium has an important role in the metabolism. It keeps the blood sugar level in balance.
Kavak, Orhan +3 more
openaire +1 more source
Salt Flotation of Şirnak Asphaltite
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2011Abstract The aim of this study was to investigate the possibility of cleaning Sirnak asphaltite by salt flotation. For this purpose, experimental studies were conducted on a Sirnak asphaltite sample containing high ash and sulfur content. The effects of salt amount, pH, frother amount, and impeller speed on the flotation were investigated separately in
openaire +1 more source
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
openaire +2 more sources
A kinetic study of Meyers' desulphurization of asphaltite
Fuel, 1989Abstract Cizre asphaltite was leached in acidic ferric chloride solutions. The parameters affecting conversion of pyrite disseminated in asphaltite to sulphate were investigated and a mathematical model having these parameters was derived to define the leaching process.
ONGANER, Yavuz, ALKAN, M, KOCAKERIM, MM
openaire +2 more sources
Importance of Asphaltite Deposits in Southeastern Anatolia
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2006Native energy sources of Turkey are quite limited, and the country is heavily dependent on the import of primary energy from abroad. The demand for electrical energy has increased very rapidly in Turkey due to the ongoing industrialization process and high population growth. Energy consumption in Turkey has continually increased over the past years and
openaire +1 more source
Demineralization of asphaltite using free jet flotation
Asia-Pacific Journal of Chemical Engineering, 2016AbstractThe mineral matter and sulfur, which are present in varying amounts in asphaltites, are a major problem in the utilization of asphaltites as a fuel. Demineralization studies were carried out on an asphaltite sample containing 43.69% ash, 35.9% volatile matter, 19.7% fixed carbon, and 4.64% total sulfur.
Ali Güney +3 more
openaire +1 more source
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 ...
openaire +1 more source
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
openaire +1 more source