Derived oil production by catalytic pyrolysis of scrap tires

doi:10.1016/S1872-2067(15)60998-6

Abstract

Abstract:

Scrap tires were pyrolyzed in a continuously stirred batch reactor in the presence and absence of catalysts. The maximum yield of derived oil was up to 55.65 wt% at the optimum temperature, 500 ℃. The catalytic pyrolysis was performed using 1.0 wt% (on a scrap tire weight basis) of catalysts based on ZSM-5, USY, β, SAPO-11, and ZSM-22. The oil products were characterized using simulation distillation, elemental analysis, and gas chromatography-mass spectrometry. The results show that using a catalyst can increase the conversion of scrap tires to gas and decrease char by-products; the yield of derived oil remains unchanged or a little lower. The oils derived from catalytic pyrolysis had H/C ratios of 1.55-1.65 and contained approximately 70-75 wt% light oil, 0.3-0.58 wt% S and 0.78-1.0 wt% N. Catalysts with high acid strengths and appropriate pore sizes, such as ZSM-5, USY, β, and SAPO-11, increased the amount of single-ring aromatics in the light-middle-fraction oil to 45 wt%. The derived oil can therefore be used as a petrochemical feedstock for producing high-value-added chemical products or fuel oil.

Key words: Scrap tire, Catalytic pyrolysis, Derived oil, Aromatic

Wei Li, Chuanfeng Huang, Dapeng Li, Pengju Huo, Mingfeng Wang, Lei Han, Gang Chen, Huihui Li, Xiaohong Li, Yongjuan Wang, Mengyan Wang. Derived oil production by catalytic pyrolysis of scrap tires[J]. Chinese Journal of Catalysis, 2016, 37(4): 526-532.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)60998-6

https://www.cjcatal.com/EN/Y2016/V37/I4/526

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