Design and fabrication of nickel-chromium reinforced 2-stage energy efficient pyrolysis reactor for waste plastics applications

ABSTRACT

This paper focuses on the design and fabrication of a two-stage energy-efficient plastic waste reactor, which is capable of melting the various types of waste plastics such as HDPE, LDPE, PS, PVC, PET, PVC, PP, and in the melting temperature in the range of 400 ^οC to 1000 ^οC. The methodology involved in this experimental process is a superalloy with a nickel-chromium alloy percentage composition of 15CR85S for the reactor and 20CR80S for the furnace part. The plasma arc welding process is applied in the temperature range 10000 ^οC with a coating thickness of 75 microns over the materials, followed by 15CR85S-75$\text{μ}$m YSZ. 20CR80S-75$\text{μ}$m YSZ and 15NI85S-75 $\text{μ}$m YSZ. The salt spraying technique is employed in this analysis. The potential benefits of this experimental process is that a reactor made up of 15CR85S-75$\text{μ}$m YSZ gives promising results of lesser thermal expansion in the range of 10 K⁻¹ × 10⁻⁶ for 15CR85S-75$\text{μ}$m YSZ for uncoated 13K⁻¹×10⁻⁶, Which 15CR85S-75$\text{μ}$m YSZ material is 23% superior to uncoated materials. The crack porosity of 20CR80S-75$\text{μ}$m YSZ is excellent in the order of 400 × 10⁻⁶, and for uncoated material, it is located in the order of 600 × 10⁻⁶. 20CR80S-75$\text{μ}$m YSZ material is 50 % superior to uncoated materials.

KEYWORDS:

• Waste plastic reactor
• energy
• biodiesel
• condenser and YSZ coatings

Acknowledgment

I Want like to be thankful to Anna University, Metallurgy Department for doing the TEM Analysis and I would like to be thankful to IIT Madras, for helping the utilisation of the Metallurgy section for the fabrication part of the reactor.

Disclosure statement

No potential conflict of interest was reported by the author(s).