title: Quality improvement of pyrolysis oil from waste rubber by adding sawdust.
abstract: This work was aimed at improving the pyrolysis oil quality of waste rubber by adding larch sawdust. Using a 1 kg/h stainless pyrolysis reactor, the contents of sawdust in rubber were gradually increased from 0%, 50%, 100% and 200% (wt%) during the pyrolysis process. Using a thermo-gravimetric (TG) analyzer coupled with Fourier transform infrared (FTIR) analysis of evolving products (TG-FTIR), the weight loss characteristics of the heat under different mixtures of sawdust/rubber were observed. Using the pyrolysis-gas chromatography (GC)-mass spectrometry (Py-GC/MS), the vapors from the pyrolysis processes were collected and the compositions of the vapors were examined. During the pyrolysis process, the recovery of the pyrolysis gas and its composition were measured in-situ at a reaction temperature of 450 °C and a retaining time of 1.2s. The results indicated that the efficiency of pyrolysis was increased and the residual carbon was reduced as the percentage of sawdust increased. The adding of sawdust significantly improved the pyrolysis oil quality by reducing the polycyclic aromatic hydrocarbons (PAHs) and nitrogen and sulfur compounds contents, resulting in an improvement in the combustion efficiency of the pyrolysis oil.
authors.affiliation: MOE Key Laboratory of Wooden Material Science and Application, College of Material Science and Technology, Wood Science and Technology, Beijing Forestry University, 100083 Beijing, China.
authors.forename: Wen-liang
authors.initials: WL
authors.lastname: Wang
authors.affiliation: MOE Key Laboratory of Wooden Material Science and Application, College of Material Science and Technology, Wood Science and Technology, Beijing Forestry University, 100083 Beijing, China. Electronic address: cjianmin@bjfu.edu.cn.
authors.forename: Jian-min
authors.initials: JM
authors.lastname: Chang
authors.affiliation: Mechanical and Energy Engineering Department, University of North Texas, 3940 N. Elm, Denton 72076, TX, USA.
authors.forename: Li-ping
authors.initials: LP
authors.lastname: Cai
authors.affiliation: Mechanical and Energy Engineering Department, University of North Texas, 3940 N. Elm, Denton 72076, TX, USA. Electronic address: Sheldon.Shi@unt.edu.
authors.forename: Sheldon Q
authors.initials: SQ
authors.lastname: Shi
mesh_terms: D056804:Biofuels / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D017745:Incineration / Q000379:methods*; D007220:Industrial Waste / Q000032:analysis*; D028221:Larix / Q000737:chemistry; D058996:Quality Improvement; D012408:Rubber / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014934:Wood / Q000032:analysis / Q000737:chemistry*
chemical_list: D056804:Biofuels; D007220:Industrial Waste; D012408:Rubber
keywords: Bio-diesel; Pyrolysis; Pyrolysis oil; Sawdust; Waste rubber