Linear low-density polyethylene gasification over highly active Ni/CeO2-ZrO2 catalyst for enhanced hydrogen generation

Abid Farooq, Surendar Moogi, Seong Ho Jang, Hari Prasad Reddy Kannapu, Soheil Valizadeh, Ashfaq Ahmed, Su Shiung Lam, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

Steam-gasification of linear low-density polyethylene (LLDPE) waste to hydrogen-rich gas has been studied systematically over nickel (10 wt.%) loaded on a variety of supports (Al2O3, CeO2, and CeO2-ZrO2) synthesized using a novel solvent deficient method (SDM). The hydrogen selectivity order of the catalysts was reported as Ni/CeO2-ZrO2>Ni/CeO2>Ni/Al2O3. The highest catalytic H2 selectivity of the Ni/CeO2-ZrO2 catalyst was reported to be ∼76 vol.%, and was attributed to the smaller nickel crystals that were finely dispersed on the support, and to formation of Ce1-xZrxO2-δ solid solutions. The Ce1-xZrxO2-δ solid solution in the Ni/CeO2-ZrO2 catalyst was observed to be bi-functional, thus reflecting the acceleration of the water gas shift and the oxidation of carbon to CO and CO2. The better resistance of the Ni/CeO2-ZrO2 catalyst towards coke deposition also indicated its potential for commercial-scale applications for the steam gasification of plastics. Therefore, this research provides an advanced route to recycle LLDPE plastic waste into hydrogen fuel, which presents both economical and environmental benefits.

Original languageEnglish
Pages (from-to)336-342
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume94
DOIs
StatePublished - 25 Feb 2021

Keywords

  • Hydrogen
  • LLDPE
  • Ni/CeO-ZrO catalyst
  • Solid solution
  • Steam gasification

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