Catalytic upgrading of biomass pyrolysis oil over tailored hierarchical MFI zeolite: Effect of porosity enhancement and porosity-acidity interaction on deoxygenation reactions

A. Palizdar and S.M. Sadrameli

Renewable Energy, 2020, vol. 148, issue C, 674-688

Abstract: The catalytic upgrading of beech wood pyrolysis oil has been carried out over microporous and hierarchical MFI zeolites to produce a blendable stream with FCC unit feedstock. Mesoporosity was introduced within the zeolite structure through the desilication process by alkaline NaOH solution with various concentrations aiming at investigating the effect of porosity improvement on catalytic upgrading parameters. The zeolite catalysts were characterized using XRD, SEM, EDS, BET and NH3-TPD analyses and the results showed that the desilication improved textural properties of the zeolites preserving crystallinity. In addition, the effect of mesoporosity, catalyst to biomass ratio, and their interactions on the bio-oil upgrading parameters such as upgrading factor, degree of deoxygenation, effective hydrogen index, relative content of various compounds and coke yield have also been analyzed. The results revealed a significant effect of the parameters on the deoxygenation activity, coke formation potential, and selectivity towards desired products. Indeed, the improved accessibility of weak and strong acid sites, as well as controlled acidity caused to the enhanced conversion of large, oxygenates to smaller ones. The larger coke yield for the optimum hierarchical catalyst (synthesized by 0.5 M solution) was associated with a lower oxidation temperature, which is suited for cost-effective catalyst regeneration.

Keywords: Bio-oil; Upgrading; Zeolite; MFI; Hierarchical; Deoxygenation (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148119316520
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:148:y:2020:i:c:p:674-688

DOI: 10.1016/j.renene.2019.10.155

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().