Fusion-assisted hydrothermal synthesis and post-synthesis modification of mesoporous hydroxy sodalite zeolite prepared from waste coal fly ash for biodiesel production
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
Increases in biodiesel prices remains a challenge, mainly due to the high cost of conventional oil feedstocks used during biodiesel production and the challenges associated with using
homogeneous catalysts in the process. This study investigated the conversion of waste-derived black
soldier fly (BSF) maggot oil feedstock over hydroxy sodalite (HS) zeolite synthesized from waste coal
fly ash (CFA) in biodiesel production. The zeolite product prepared after fusion of CFA followed
by hydrothermal synthesis (F-HS) resulted in a highly crystalline, mesoporous F-HS zeolite with a
considerable surface area of 45 m2/g. The impact of post-synthesis modification of the parent HS
catalyst (F-HS) by ion exchange with an alkali source (KOH) on its performance in biodiesel production was investigated. The parent F-HS zeolite catalyst resulted in a high biodiesel yield of 84.10%,
with a good quality of 65% fatty acid methyl ester (FAME) content and fuel characteristics compliant
with standard biodiesel specifications. After ion exchange, the modified HS zeolite catalyst (K/F-HS)
decreased in crystallinity, mesoporosity and total surface area.
Description
Keywords
Coal fly ash, Zeolite, Hydroxy sodalite, Biodiesel, Chemistry
Citation
Shabani, J. M. et al. (2022). Fusion-assisted hydrothermal synthesis and post-synthesis modification of mesoporous hydroxy sodalite zeolite prepared from waste coal fly ash for biodiesel production. Catalysts, 12(12), 1652. https://doi.org/10.3390/catal12121652