Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Aral Olcay"'
Publikováno v:
Fuel. 80:2181-2188
Rates of formation of oil, asphaltenes, and preasphaltenes during liquefaction of six Turkish coals in tetralin with microwave heating have been experimentally determined. Five reaction mechanisms have been proposed and tested to estimate the rates o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7a564a196cd5711e5de6dcf2ff200d6
https://doi.org/10.1016/s0016-2361(01)00102-8
https://doi.org/10.1016/s0016-2361(01)00102-8
Publikováno v:
Fuel Processing Technology. 73:111-125
The effect of the ratio of solvent to coal (S/C) and the period of heating by microwave on the solubilization of Turkish Coals (Beypazari, Bolu-Goynuk, Mugla-Yatagan, Soma-Merkez, Tuncbilek lignites and Zonguldak coal) in tetralin have been investiga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2149207c57d04c6d131b304c3a11d2c1
https://doi.org/10.1016/s0378-3820(01)00196-5
https://doi.org/10.1016/s0378-3820(01)00196-5
Publikováno v:
Fuel. 80:559-564
Two Turkish lignites were extracted with tetralin in a batch autoclave under nitrogen atmosphere. Fe2O3, Mo(CO)6, MoO3 or Al2O3 were used as the added catalyst. The isothermal extraction temperatures ranged from 325 to 425°C, the starting nitrogen p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e79daf170ed1ee3bba1fbe7afc1ae0db
https://doi.org/10.1016/s0016-2361(00)00119-8
https://doi.org/10.1016/s0016-2361(00)00119-8
Publikováno v:
Fuel Processing Technology. 67:191-204
Zonguldak bituminous coal and Mugla–Yatagan, Seyitomer and Bolu–Goynuk lignites were O -methylated with potassium hydroxide–dimethyl sulphate (KOH–DMS) and acetone–potassium carbonate–dimethyl sulphate (acetone–K 2 CO 3 –DMS) methods.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56e1f84a3fc776e04e82b2961d9326f7
https://doi.org/10.1016/s0378-3820(00)00100-4
https://doi.org/10.1016/s0378-3820(00)00100-4
Publikováno v:
Fuel Processing Technology. 55:235-250
Zonguldak bituminous coal, Tuncbilek and Soma–Merkez lignites were each separated into two sub-fractions, coal rich and mineral matter rich, using a centrifugal float–sink separation technique in heavy media. An isopropyl alcohol (IPA)–carbon t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fb56c8d54dd458e77bb2aaca3f72e11
https://doi.org/10.1016/s0378-3820(98)00053-8
https://doi.org/10.1016/s0378-3820(98)00053-8
Autor:
Aral Olcay, Fatma Söğüt
Publikováno v:
Fuel Processing Technology. 55:107-115
The effects of ultraviolet (UV) irradiation, acid treatment and sunlight on the dissolution of Turkish lignites in tetralin have been investigated. Original and 0.01 N HCl washed lignite samples were exposed to UV irradiation for 24, 48, 72, 96 and 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c273685d3528c5b58bda4214c8cba5bb
https://doi.org/10.1016/s0378-3820(98)00045-9
https://doi.org/10.1016/s0378-3820(98)00045-9
Autor:
Kadim Ceylan, Aral Olcay
Publikováno v:
Fuel Processing Technology. 53:183-195
The reaction kinetics of the dissolution of two Turkish lignites have been investigated. The dissolution products were separated into pseudo-components such as preasphaltenes, asphaltenes and oils by successive solvent extractions. Reaction mechanism
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d44476812d8f0e6ac59dbdcb90a1b6ab
https://doi.org/10.1016/s0378-3820(97)00054-4
https://doi.org/10.1016/s0378-3820(97)00054-4
Autor:
Zeki Aktas, Aral Olcay
Publikováno v:
Fuel Processing Technology. 48:61-72
Elbistan-Afsin lignite, 64.2% C (daf), was reduced with lithium in THF in the presence of purified naphthalene as an electron transfer agent. The reduced lignite was then extracted with supercritical toluene. Even under comparatively mild conditions,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::153822cbe4e62e022eb26873e1bdac68
https://doi.org/10.1016/0378-3820(96)01029-6
https://doi.org/10.1016/0378-3820(96)01029-6
Autor:
Bayram Demirci, Aral Olcay
Publikováno v:
Fuel Science and Technology International. 13:775-791
After preextraction with ethanol-benzene (1:2) in a Soxhlet apparatus Tuncbilek lignite was extracted with dioxane at 330°C in an autoclave at different pressures and for different exposure times. The extracts were fractionated and many of the compo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b45532722575e37ae2f35694d9a5772c
https://doi.org/10.1080/08843759508947705
https://doi.org/10.1080/08843759508947705
Publikováno v:
Fuel Science and Technology International. 13:569-577
Preswelling of Mugla-Yatagan lignite with THF (Tetrahydrofuran) followed by removal of the swelling agents results in higher extract yields, probably because the solvent molecules had easier access to the expanded pore structure of the swollen lignit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56c3e178d3c9d928acbc2167ee32b772
https://doi.org/10.1080/08843759508947695
https://doi.org/10.1080/08843759508947695