期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 78, 期 2, 页码 243-249出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2006.07.004
关键词
USY; pyrolysis; tyres; catalyst
In this paper, an ultrastable Y-type (USY) zeolite was investigated with two-staged pyrolysis-catalysis of waste tyres. Waste tyres were pyrolysed in a fixed bed reactor and the evolved pyrolysis gases were passed through a secondary catalytic reactor. The main objective of this paper was to obtain high concentration of certain aromatic hydrocarbons suitable to be used as a chemical feedstock rather than a liquid fuel, and the influence of catalyst/tyre ratio on the product yield and composition of derived oils. The light fraction (boiling point < 220 degrees C) was distilled from the derived oil prior to be analyzed with gas chromatography/mass spectrometry (GC/MS). It showed that the increase of catalyst/tyre ratio resulted in high yield of gas at the expense of the oil yield. The high catalyst/tyre ratio favored to increase the concentration of light fraction (< 220 degrees C) in oil. Increasing the catalyst/tyre ratio resulted in significant changed in the concentration of benzene, toluene, xylenes and the alkyl aromatic compounds. For benzene and toluene, the highest concentration was obtained at the catalyst/tyre ratio of 0.5. The concentration of xylenes increased with the increasing of catalyst/tyre ratio. (c) 2006 Elsevier B.V. All rights reserved.
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