Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al 2 O 3 Catalyst

Danbee Han, Seungcheol Shin, Haneul Jung, Wonjun Cho and Youngsoon Baek ()
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Danbee Han: Department of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of Korea
Seungcheol Shin: Department of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of Korea
Haneul Jung: Department of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of Korea
Wonjun Cho: Bio Friends Inc., Yuseong-gu, Daejeon 34028, Republic of Korea
Youngsoon Baek: Department of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of Korea

Energies, 2023, vol. 16, issue 6, 1-14

Abstract: Sustained increase in plastic use has placed a significant burden on waste disposal infrastructure. Pyrolysis is the process of decomposing high-molecular-weight compounds by heating waste plastics at 500–1000 °C without oxygen. This process considerably reduces greenhouse gas emissions and has a high alternative energy effect (0.57 TOE ton −1 ). After a separation process, the oil produced by pyrolysis (C5–C20) can yield naphtha oil (C6–C7). Subsequently, hydrogen can be produced through a reforming reaction of this naphtha oil. Here, we produced hydrogen from waste plastic pyrolysis oil over a Ni/Ce-Zr-Mg/Al 2 O 3 catalyst using a steam reforming process. A model oil combining the major substances of C6 and C7 (hexane, hexene, heptane, heptene, and toluene) was formed. From the reaction products, the hydrogen yield was obtained based on analysis of H 2 , CO, and CO 2 concentrations using gas chromatography. The effect of N 2 and O 2 addition on hydrogen yield was analyzed within a temperature range of 750–850 °C, steam/carbon (S/C) ratio of 0.6–4, and space velocity of 7600–19,100 h −1 . In addition, a durability test was performed using 3 wt.% Ni/Ce-Zr-Mg/Al 2 O 3 catalysts for 100 h; a hydrogen yield of 91.3% was maintained from the refined waste plastic oil.

Keywords: waste plastic; hydrogen; oil pyrolysis; Ni catalyst; steam reforming (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: 2023
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