Effect of Steaming on Waste-Derived Zeolite ZSM-5 as Methanol-To-Hydrocarbons Catalyst

Nikolaos Nikolopoulos, Oscar van Veenhuizen, Bert Marc Weckhuysen*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The valorization of low-grade industrial residues into valuable materials has been a way to reduce the impact of the industry on planetary boundaries. Silicon-rich wastes have been used for zeolite synthesis while the impurities originating from wastes have a vital role in the physicochemical properties and the catalytic performance of waste-derived zeolites. Here, the effect of steaming and the impact of impurities on waste-derived zeolites were investigated. Steamed waste-derived zeolite ZSM-5 maintained their structure while their Brønsted acidity was decreased significantly due to dealumination. Electron paramagnetic resonance revealed that steaming of the samples resulted in the re-dispersion of Fe impurities phases. The waste-derived zeolites exhibited a high amount of weak and intermediate acidity upon steaming. Interestingly, the waste-derived sample with a higher amount of impurities had an increase in Lewis acidity upon steaming, while catalytic testing in the Methanol-to-Hydrocarbons reaction exhibited 10 % higher conversion and 4 % in propylene yield.

Original languageEnglish
Article numbere202201021
Pages (from-to)1-12
Number of pages12
JournalChemCatChem
Volume14
Issue number21
DOIs
Publication statusPublished - 8 Nov 2022

Keywords

  • Acidity
  • Methanol-to-Hydrocarbons
  • steaming
  • waste valorization
  • zeolites

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