Combined pyrolysis and sulphided NiMo/Al 2 O 3 catalysed hydroprocessing in a multistage strategy for the production of biofuels from milk processing waste

Shane McIntosh; Md. Nurun Nabi; Lalehvash Moghaddam; Peter Brooks; Parya Samadi Ghandehari; Dirk Erler

doi:10.1016/j.fuel.2021.120602

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Combined pyrolysis and sulphided NiMo/Al 2 O 3 catalysed hydroprocessing in a multistage strategy for the production of biofuels from milk processing waste

Journal article

Peer reviewed

Combined pyrolysis and sulphided NiMo/Al 2 O 3 catalysed hydroprocessing in a multistage strategy for the production of biofuels from milk processing waste

Shane McIntosh, Md. Nurun Nabi, Lalehvash Moghaddam, Peter Brooks, Parya Samadi Ghandehari and Dirk Erler

Fuel, Vol.295, pp.1-10

2021

DOI: https://doi.org/10.1016/j.fuel.2021.120602

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Abstract

milk processing sludges

pyrolysis

bio-oils

heterogeneous catalyst upgrading

low-oxygenated biofuel

Pyrolytic bio-oils derived from renewable organic wastes are credible second-generation biofuels. In crude form, bio-oils are inherently complex mixtures that largely limit their direct application as fuels and integration into existing petroleum infrastructure, without additional upgrading. Herein, we report on low-oxygenated biofuel production from milk processing sludge using a multistage process configuration. In the first stage, bio-oil yields were maximised (57.7%) under slow pyrolysis conditions at 450 °C. Bio-oils were enriched in aliphatic hydrocarbons (19–22% alkanes), (11–14% alkenes) and alkyl nitriles (57–63%), while aromatics remained low at <2%. A relatively low bio-oil O/C molar ratio (0.08 to 0.1) and a correspondingly high HHV (40.8–41.8 MJ/kg) display possible fuel applications. Increasing pyrolysis temperatures (>450 °C) was not beneficial to bio-oil yields, reduced hydrocarbon contents and increased heteroatoms (O, S, N). In the second stage, sulphided Ni-Mo/Al2O3 catalysed hydroprocessing and distillation upgrading of bio-oils generated 100% C8-C22 saturated alkane distillates. With regard to fuel properties, oxygenation (0.26–0.89%), viscosities (4–6 mm2/s) and densities (ca.0.82 g/cm3) were comparable to standard diesel fuels. Resultant HHV (46.24 MJ/kg) and cetane index (69) of distillates produced from 450 °C bio-oils far exceeded those of diesel fuel standards, demonstrating direct fuel application and petroleum fuel compatibility.

Details

Title: Combined pyrolysis and sulphided NiMo/Al 2 O 3 catalysed hydroprocessing in a multistage strategy for the production of biofuels from milk processing waste
Authors: Shane McIntosh (Author) - Southern Cross University
Md. Nurun Nabi (Author) - Central Queensland University
Lalehvash Moghaddam (Author) - Queensland University of Technology
Peter Brooks (Author) - University of the Sunshine Coast, Queensland, School of Science and Engineering - Legacy
Parya Samadi Ghandehari (Author) - Southern Cross University
Dirk Erler (Author) - University of the Sunshine Coast, Queensland, School of Science and Engineering - Legacy
Publication details: Fuel, Vol.295, pp.1-10
Publisher: Elsevier Ltd
DOI: 10.1016/j.fuel.2021.120602
ISSN: 1873-7153
Organisation Unit: School of Science, Technology and Engineering; University of the Sunshine Coast, Queensland; Centre for Bioinnovation; School of Science and Engineering - Legacy
Language: English
Record Identifier: 99518108602621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Energy & Fuels; Engineering, Chemical

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