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http://dx.doi.org/10.7464/ksct.2022.28.4.331

Hydrogenation of Polycyclic Aromatic Hydrocarbons Over Pt/Kieselguhr Catalysts in a Trickle Bed Reactor  

Seung Kyo, Oh (Department of Chemical Engineering, Kongju National University)
Seohyeon, Oh (Department of Chemical Engineering, Kongju National University)
Gi Bo, Han (Institute for Advanced Engineering)
Byunghun, Jeong (Agency for Defense Development)
Jong-Ki, Jeon (Department of Chemical Engineering, Kongju National University)
Publication Information
Clean Technology / v.28, no.4, 2022 , pp. 331-338 More about this Journal
Abstract
The objective of this study is to prepare bead-type and pellet-type Pt (1 wt%)/Kieselguhr catalysts as hydrogenation catalysts for the polycyclic aromatic hydrocarbons (PAHs) included in pyrolysis fuel oil (PFO). The optimal reaction temperature to maximize the yield of saturated cyclic hydrocarbons during the PFO-cut hydrogenation reaction in a trickle bed reactor was determined to be 250 ℃. A hydrogen/PFO-cut flow rate ratio of 1800 was found to maximize 1-ring saturated cyclic compounds. The yield of saturated cyclic compound increased as the space velocity (LHSV) of PFO-cut decreased. The difference in hydrogenation reaction performance between the pellet catalyst and the bead catalyst was negligible. However, the catalyst impregnated by Pt after molding the Kieselguhr support (AI catalyst) showed higher hydrogenation activity than the catalyst molded after Pt impregnation on the Kieselguhr powder (BI catalyst), which was a common phenomenon in both the pellet catalysts and bead catalysts. This may be due to a higher number of active sites over the AI catalyst compared to the BI catalyst. It was confirmed that the pellet catalyst prepared by the AI method had the best reaction activity of the prepared catalysts in this study. The majority of the PFO-cut hydrogenation products were cyclic hydrocarbons ranging from C8 to C15, and C11 cyclic hydrocarbons had the highest distribution. It was confirmed that both a cracking reaction and hydrogenation occurred, which shifted the carbon number distribution towards light hydrocarbons.
Keywords
Pt/Kieselguhr; Pyrolysis fuel oil; Polycyclic aromatic hydrocarbons; Hydrogenation; Pellet catalyst;
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Times Cited By KSCI : 1  (Citation Analysis)
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