Photocatalytic Dissolution of Two Turkish Lignites in Tetralin: Effects of UV Irradiation, TiO2 and ZnO as Photocatalyst

Karacan, Filiz; Şimşek, Emir H.; Toğrul, Taner

doi:10.1080/00908310490449397

Cited by 3 publications

(2 citation statements)

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“…There are considerable studies on the liquefaction of Turkish coals (Yürüm et al, 1991;Öner et al, 1990Şimşek et al, 2001, 2002bKaraca and Ceylan, 2002;Agun et al, 2005;Karacan et al, 2005;Karaca, 2005aKaraca, , 2005bYagmur et al, 2005).…”

Section: Studies On Turkish Lignitementioning

confidence: 99%

Turkey's Major Lignite Fields and Significance of Lignite for Energy Necessity

Balat¹

2007

Energy Sources, Part B: Economics, Planning, and Policy

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The objective of this study is to determine the lignite use for Turkey's energy necessity. Lignite is the most important energy resource of Turkey when compared with others according to the amount of reserves. Lignite is the dominant source of energy produced (43%) in Turkey. Lignite deposits are encountered in almost every region of Turkey. Total lignite reserves are estimated at 8,375 million tons, of which 7,340 million tons (88%) is economically feasible. Share of lignite reserves of Turkey are 2% in the world. Lignite deposits are encountered in almost every region of Turkey. Afsin-Elbistan, Mugla, Soma, Tuncbilek, Seyitomer, Beypazari and Sivas basins constitutes the most important known lignite reserves. The biggest lignite deposits, 40% of the total, are in Afsin-Elbistan. Lignite extraction is expected to increase as the government feels pressure to close down unprofitable hard coal mines that are geologically difficult, increasing the cost of extraction.

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Section: Studies On Turkish Lignitementioning

confidence: 99%

Turkey's Major Lignite Fields and Significance of Lignite for Energy Necessity

Balat¹

2007

Energy Sources, Part B: Economics, Planning, and Policy

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“…Dissolution/degradation of Turkish lignites in tetralin at ambient temperature with UV irradiation have also been investigated. , However, there is no study about the effect of irradiation power on the liquefaction of lignites by photochemical energy. Therefore, the objective of this work was to investigate the effect of UV irradiation power on the photochemical dissolution/degradation of lignites in tetralin at ambient temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

Photochemical Dissolution of Turkish Lignites in Tetralin at Different Irradiation Power and Reaction Times

Karacan

Torul

2007

Energy Fuels

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The effect of the power of ultraviolet (UV) irradiation on the tetrahydrofuran (THF) solubles yield (the total soluble product) and the soluble product distribution of the dissolution of Turkish lignites (Beypazarı and Tunçbilek lignite) in tetralin at ambient temperatures has been investigated. The lignite samples were exposed to UV irradiation for 1, 2, 3, 5, and 10 days in the power of irradiation ranging from 0 to 180 W at 60 W intervals. The yields of THF solubles and oils increased with increasing irradiation power and time. The optimum irradiation power depends on the irradiation time to obtain the highest degradation products. However, the yield of degradation products depends also on the lignite type. The largest fraction obtained from lignites by photochemical energy is oil. While the yields of THF solubles and oils sharply increased with irradiation power at longer reaction times, the yields of asphaltenes (AS) slightly decreased. Increasing oil yields is relatively larger when AS yields tend to decrease. These trends of AS and oil yields are ascribable to conversion of AS to oils at higher power. Small changes were observed in the PAS yields under all conditions.

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