Studying the Influence of Temperature and Residence Time on the Recovery of Oil Filter Components via Pyrolysis

Document Type : Original Article

Authors

1 Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran

2 Tarbiat Modares University

10.22034/jfnc.2024.425226.1365

Abstract

Used oil filters contain both significant environmental hazards and valuable components suitable for reuse, justifying their recycling. Among various recycling methods, pyrolysis has been employed in this project. This study investigates the behavior of each influential material in residue production, including used oil, rubber gasket, and filter paper, with the alteration of two parameters: temperature and residence time, individually. Experiments were conducted at temperatures of 360, 440, and 520 degrees Celsius, with two residence times of 30 and 90 minutes, under a constant nitrogen flow rate of 200 ml/min. The residue yield was measured after each experiment. In the pyrolysis of used oil, with an increase in temperature and residence time, the residue production initially decreased due to the advancement of primary thermal cracking reactions in the feed. However, secondary thermal cracking of hydrocarbons present in the reactor led to a subsequent increase in residue production. In the pyrolysis of rubber gasket, the residue production trend consistently decreased with rising temperature and residence time, indicating the progression of pyrolysis and initial thermal cracking, as well as the vaporization of solid hydrocarbon materials at higher temperatures. In the examination of the effect of temperature and residence time on filter paper pyrolysis, it was observed that increasing these parameters reduced the efficiency of residue production. This reduction could be attributed to either the initial thermal cracking of the filter paper or the secondary thermal cracking of the produced residue.

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References

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History

  • Receive Date: 14 November 2023
  • Revise Date: 03 January 2024
  • Accept Date: 13 February 2024

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