Abstract
Research on the synergistic high-value reuse of waste tires and used catalysts in spent fluid catalytic cracking (FCC) catalysts was carried out in this study to address the serious ecological and environmental problems caused by waste tires and spent FCC catalysts. The experiment, in which a spent FCC catalyst was applied to the catalytic cracking of waste tires, fully utilized the residual activity of the spent FCC catalyst and was compared with a waste tire pyrolysis experiment. The comparative experimental results indicated that the spent FCC catalyst could improve the cracking efficiency of waste tires, increase the output of light oil in pyrolysis products, and improve the quality of pyrolysis oil. It could also be used for the conversion of sulfur compounds during cracking. The content of 2-methyl-1-propylene in catalytic cracking gas was found to be up to 65.59%, so a new method for producing high-value chemical raw materials by the catalytic cracking of waste tires with spent FCC catalysts is proposed.
Highlights
The tire is a kind of product which requires high safety performance
By comparing the experimental results between waste tire pyrolysis and spent fluid catalytic cracking (FCC) catalysts for catalytic cracking, we have examined the feasibility of applying spent FCC catalysts in the cracking process of waste tires to realize the low-cost operation of waste tire catalytic cracking
Catalytic cracking of waste tires with spent FCC catalysts improved pyrolysis efficiency and the quality of cracking oil and reduced the content of sulfur and nitrogen in pyrolysis gas, which proves that the application of spent FCC catalysts in the pyrolysis of waste tires is effective
Summary
The tire is a kind of product which requires high safety performance. In order to ensure personal safety, tires must possess high strength, wear resistance, stability, and aging resistance. Tires cannot degrade naturally for a long time (hundreds or even thousands of years) after abandonment. Traditional ways of solid waste disposal such as landfills are not suited to used tires because they occupy a significant amount of land [3,4,5]. Removing this “black pollution” has become a worldwide problem. Some countries in Europe have banned waste tire burning, landfilling, and piling since
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