Thermodynamic evaluation of integrated plasma gasification combined cycle with plastic waste feedstock

Serang Kwon, Seong kyun Im

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Waste-to-energy cycles fed with plastic waste were evaluated by modeling an integrated gasification combined cycle (IGCC) or an integrated plasma gasification combined cycle (IPGCC) with a thermal plasma (TP) or non-thermal plasma (NTP). While TP is generally used in the gasification unit of an IPGCC, using NTP may increase the energy efficiency of the IPGCC via lowering the power consumption, albeit with lower syngas yields than TP. In this regard, this study investigated the effects of using NTP in the IPGCC on energy efficiency and exergy loss. The IPGCC with single-stage TP (TP1), two-stage TP (TP2), or NTP with cold gas efficiency (CGE) within 60–80% exhibited higher energy efficiency than IGCC. Also, CGE and plasma power consumption of the IPGCC with NTP to outperform the IPGCC with TP1 or TP2 were delineated. NTP with CGE over 80% achieved higher energy efficiency than that of TP1 with 100% CGE regardless of the plasma power consumptions. When the plasma power consumption of TP2 exceeded 135 kWh/ton, NTP achieved greater energy efficiency at similar CGE values. Moreover, sensitivity analysis on energy efficiency and analysis on total exergy loss in the IPGCC revealed that achieving a higher CGE was more crucial than reducing plasma power consumption. Furthermore, energy analysis of the IPGCC fed different plastic types showed that high hydrogen-to-carbon ratio plastics were more suitable for the IPGCC than their lower hydrogen-to-carbon ratio counterparts. Therefore, this study provides guidelines for estimating suitability of a plastic type for the IPGCC with NTP.

Original languageEnglish
Article number148771
JournalChemical Engineering Journal
Volume482
DOIs
Publication statusPublished - 2024 Feb 15

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.

Keywords

  • Cycle modeling
  • Integrated plasma gasification combined cycle
  • Non-thermal plasma
  • Plasma gasification
  • Plastic waste

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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