Non-catalytic pyrolysis of scrap tires using a newly developed two-stage pyrolyzer for the production of a pyrolysis oil with a low sulfur content

Gyung-Goo Choi, Seung-Jin Oh and Joo-Sik Kim

Applied Energy, 2016, vol. 170, issue C, 140-147

Abstract: The aim of this work was to reduce the sulfur content of pyrolysis oil derived from the scrap tire pyrolysis. In this respect, a series of pyrolysis experiments was conducted in both a fluidized bed reactor (one-stage pyrolysis) and a newly developed two-stage pyrolyzer consisting of an auger reactor and a fluidized bed reactor in series (two-stage pyrolysis). The one-stage pyrolysis was carried out at ∼500 and 600°C with different fluidizing gases (N2 and product gas). In the experiments, the pyrolysis oil obtained at ∼500°C had a lower sulfur content than that produced at ∼600°C. N2 was better at producing a low-sulfur pyrolysis oil than product gas. The sulfur contents of the oils obtained from the one-stage pyrolysis ranged from 0.75 to 0.92wt.%. The two-stage pyrolysis was conducted using product gas as the fluidizing medium at different auger reactor temperatures (∼230–450°C) and at a constant fluidized bed reactor temperature (∼510°C). A pyrolysis oil containing only 0.55wt.% of sulfur could be produced at the temperatures of the auger reactor of ∼330°C and fluidized bed reactor of ∼510°C. Moreover, the two-stage pyrolysis could produce an oil with a low nitrogen content (0.28wt.%). A pyrolysis oil obtained from the auger reactor contained dl-limonene up to 50wt.%.

Keywords: Scrap tire; One-stage pyrolysis; Two-stage pyrolysis; Pyrolysis oil; Sulfur; Limonene (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

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DOI: 10.1016/j.apenergy.2016.02.119

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