Hydrocracking of C 5 -Isolated Asphaltene and Its Fractions in Batch and Semi-Batch Reactors

Ngoc Thuy Nguyen, Ki Hyuk Kang, Pill Won Seo, Narae Kang, Duy Van Pham, Chiwoong Ahn, Gyoo Tae Kim and Sunyoung Park
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Ngoc Thuy Nguyen: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
Ki Hyuk Kang: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
Pill Won Seo: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
Narae Kang: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
Duy Van Pham: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
Chiwoong Ahn: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
Gyoo Tae Kim: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
Sunyoung Park: Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea

Energies, 2020, vol. 13, issue 17, 1-12

Abstract: Non-catalytic and catalytic hydrocracking of C 5 -isolated asphaltene and its subfractions were performed in batch and semi-batch reactors at various temperatures. Catalyst and H 2 played an important role in the hydrocracking of asphaltenes. In the batch system, the catalyst enhanced asphaltene conversion to light liquid products and suppressed coke formation. The coke formation was controlled at a low reaction temperature, but the reaction rate was too low. Light liquid products were also formed at the beginning of the reaction even at high temperatures, but the coke formation was predominant as the reaction time went on due to the decrease in H 2 amount in the reactor. To solve these problems, H 2 was continuously supplied during the reaction using the semi-batch system. Sufficient supply of H 2 improved the conversion of asphaltenes to light liquid products while inhibiting the coke formation. The lightest asphaltene fraction was easily cracked into light products by inhibiting the coke formation, while the heaviest fraction tends to form coke. The lightest asphaltene fraction prolonged the coke induction period of the heaviest fraction during the catalytic hydrocracking because the lightest fraction contained a significant amount of heavy resin close to that which could prevent aggregation of the heaviest asphaltenes.

Keywords: slurry-phase hydrocracking; asphaltenes; vacuum residue; dispersed catalyst (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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