Photochemical dissolution of Turkish lignites in tetralin at different irradiation power and reaction times

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Energy and Fuels

DOI:https://doi.org/10.1021/ef060576v· OSTI ID:20939425

Karacan, F; Torul, T ^[1]

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1. Turkish Atomic Energy Authority, Ankara (Turkey). Saraykoy Nuclear Research and Training Center

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 (Beypazari and Tuncbilek 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. 27 refs., 5 figs., 1 tab.

• OSTI ID: 20939425
• Journal Information: Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 4 Vol. 21; ISSN ENFUEM; ISSN 0887-0624
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
DISSOLUTION
IRRADIATION
LIGNITE
OIL YIELDS
PHOTOCHEMICAL REACTIONS
TURKEY
ULTRAVIOLET RADIATION