title: Polycyclic aromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs) mitigation in the pyrolysis process of waste tires using CO₂ as a reaction medium.
abstract: Our work reported the CO2-assisted mitigation of PAHs and VOCs in the thermo-chemical process (i.e., pyrolysis). To investigate the pyrolysis of used tires to recover energy and chemical products, the experiments were conducted using a laboratory-scale batch-type reactor. In particular, to examine the influence of the CO2 in pyrolysis of a tire, the pyrolytic products including C1-5-hydrocarbons (HCs), volatile organic carbons (VOCs), and polycyclic aromatic hydrocarbons (PAHs) were evaluated qualitatively by gas chromatography (GC) with mass spectroscopy (MS) as well as with a thermal conductivity detector (TCD). The mass balance of the pyrolytic products under various pyrolytic conditions was established on the basis of their weight fractions of the pyrolytic products. Our experimental work experimentally validated that the amount of gaseous pyrolytic products increased when using CO2 as a pyrolysis medium, while substantially altering the production of pyrolytic oil in absolute content (7.3-17.2%) and in relative composition (including PAHs and VOCs). Thus, the co-feeding of CO2 in the pyrolysis process can be considered an environmentally benign and energy efficient process.
authors.affiliation: Department of Environment and Energy, Sejong University, Seoul, Republic of Korea. Electronic address: ekwon74@sejong.ac.kr.
authors.forename: Eilhann E
authors.initials: EE
authors.lastname: Kwon
authors.affiliation: Environmental Energy Division, Land & Housing Research Institute, Korea National Land & Housing Corporation, Republic of Korea. Electronic address: ojijp@lh.or.kr.
authors.forename: Jeong-Ik
authors.initials: JI
authors.lastname: Oh
authors.affiliation: Department of Civil and Environmental Engineering, Hanyang University, Seoul, Republic of Korea.
authors.forename: Ki-Hyun
authors.initials: KH
authors.lastname: Kim
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control*; D002245:Carbon Dioxide / Q000737:chemistry*; D006801:Humans; D017745:Incineration; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D012408:Rubber; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons; D055549:Volatile Organic Compounds; D002245:Carbon Dioxide; D012408:Rubber
keywords: Air pollutant control; CO(2); Pyrolysis; Thermal degradation; Used tires