Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> Catalyst
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 hi...
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MDPI AG
2023-03-01
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| author | Danbee Han Seungcheol Shin Haneul Jung Wonjun Cho Youngsoon Baek |
| author_facet | Danbee Han Seungcheol Shin Haneul Jung Wonjun Cho Youngsoon Baek |
| author_sort | Danbee Han |
| collection | DOAJ |
| description | 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<sup>−1</sup>). 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<sub>2</sub>O<sub>3</sub> 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<sub>2</sub>, CO, and CO<sub>2</sub> concentrations using gas chromatography. The effect of N<sub>2</sub> and O<sub>2</sub> 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<sup>−1</sup>. In addition, a durability test was performed using 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> catalysts for 100 h; a hydrogen yield of 91.3% was maintained from the refined waste plastic oil. |
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| spelling | doaj.art-cde88563ed794aee89fbf11b1648f5122023-11-17T10:49:09ZengMDPI AGEnergies1996-10732023-03-01166265610.3390/en16062656Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> CatalystDanbee Han0Seungcheol Shin1Haneul Jung2Wonjun Cho3Youngsoon Baek4Department of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of KoreaDepartment of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of KoreaDepartment of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of KoreaBio Friends Inc., Yuseong-gu, Daejeon 34028, Republic of KoreaDepartment of Environment-Energy Engineering, The University of Suwon, 17 Wauan-gil, Hwaseong-si 18323, Republic of KoreaSustained 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<sup>−1</sup>). 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<sub>2</sub>O<sub>3</sub> 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<sub>2</sub>, CO, and CO<sub>2</sub> concentrations using gas chromatography. The effect of N<sub>2</sub> and O<sub>2</sub> 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<sup>−1</sup>. In addition, a durability test was performed using 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> catalysts for 100 h; a hydrogen yield of 91.3% was maintained from the refined waste plastic oil.https://www.mdpi.com/1996-1073/16/6/2656waste plastichydrogenoil pyrolysisNi catalyststeam reforming |
| spellingShingle | Danbee Han Seungcheol Shin Haneul Jung Wonjun Cho Youngsoon Baek Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> Catalyst Energies waste plastic hydrogen oil pyrolysis Ni catalyst steam reforming |
| title | Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> Catalyst |
| title_full | Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> Catalyst |
| title_fullStr | Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> Catalyst |
| title_full_unstemmed | Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> Catalyst |
| title_short | Hydrogen Production by Steam Reforming of Pyrolysis Oil from Waste Plastic over 3 wt.% Ni/Ce-Zr-Mg/Al<sub>2</sub>O<sub>3</sub> Catalyst |
| title_sort | hydrogen production by steam reforming of pyrolysis oil from waste plastic over 3 wt ni ce zr mg al sub 2 sub o sub 3 sub catalyst |
| topic | waste plastic hydrogen oil pyrolysis Ni catalyst steam reforming |
| url | https://www.mdpi.com/1996-1073/16/6/2656 |
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