Characteristics of gas and residues produced from electric arc pyrolysis of waste lubricating oil |
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| Authors: | Geum-Ju Song Yong-Chil Seo Deepak Pudasainee In-Tae Kim |
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| Institution: | 1. Institute of Environmental and Energy Technology, Pohang University of Science and Technology, Pohang 790-784, South Korea;2. Department of Environmental Engineering, Yonsei University, Wonju 220-710, South Korea;3. Korea Atomic Energy Research Institute, Daejeon 305-353, South Korea;1. Dicle University, Mechanical Engineering Department, Diyarbakir, Turkey;2. University of Gaziantep, Mechanical Engineering Department, 27310 Gaziantep, Turkey;3. University of Osmaniye Korkut Ata, Mechanical Engineering Department, Osmaniye, Turkey;1. School of Electrical Engineering, Nantong University, Nantong, Jiangsu 226019, China;2. School of Mechanical Engineering, Nantong University, Nantong, Jiangsu 226019, China;1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, No. 2 Sipailou, Xuanwu District, Nanjing, Jiangsu 210096, China;2. National Engineering Research Center of Turbo-generator Vibration, Southeast University, Nanjing 210096, Jiangsu Province, China;3. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA;1. Chemical Engineering and Pilot Plant Department, National Research Centre, Dokki, Egypt;2. Egyptian Petroleum Research Institute, EPRI, Cairo, Egypt |
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| Abstract: | An attempted has been made to recover high-calorific fuel gas and useful carbonaceous residue by the electric arc pyrolysis of waste lubricating oil. The characteristics of gas and residues produced from electric arc pyrolysis of waste lubricating oil were investigated in this study. The produced gas was mainly composed of hydrogen (35–40%), acetylene (13–20%), ethylene (3–4%) and other hydrocarbons, whereas the concentration of CO was very low. Calorific values of gas ranged from 11,000 to 13,000 kcal kg?1 and the concentrations of toxic gases, such as NOx, HCl and HF, were below the regulatory emissions limit. Gas chromatography–mass spectrometry (GC/MS) analysis of liquid-phase residues showed that high molecular-weight hydrocarbons in waste lubricating oil were pyrolyzed into low molecular-weight hydrocarbons and hydrogen. Dehydrogenation was found to be the main pyrolysis mechanism due to the high reaction temperature induced by electric arc. The average particle size of soot as carbonaceous residue was about 10 μm. The carbon content and heavy metals in soot were above 60% and below 0.01 ppm, respectively. The utilization of soot as industrial material resources such as carbon black seems to be feasible after refining and grinding. |
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