Characteristics of gas and residues produced from electric arc pyrolysis of waste lubricating oil

Geum Ju Song, Yong Chil Seo, Deepak Pudasainee, In Tae Kim

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22 Citations (Scopus)

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 13,000kcalkg-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 10μm. The carbon content and heavy metals in soot were above 60% and below 0.01ppm, respectively. The utilization of soot as industrial material resources such as carbon black seems to be feasible after refining and grinding.

Original languageEnglish
Pages (from-to)1230-1237
Number of pages8
JournalWaste Management
Volume30
Issue number7
DOIs
Publication statusPublished - 2010 Jul

Bibliographical note

Funding Information:
This work was sponsored by Korean Ministry of Commerce, Industry and Energy , and partially supported by BK21 Project .

All Science Journal Classification (ASJC) codes

  • Waste Management and Disposal

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