Co-processing a waste fatty acid mixture and unrefined gas oil to produce renewable diesel fuel-blending components

O. Tóth, A. Holló, J. Hancsók

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

With the catalytic quality improvement of fatty acids, renewable alternative fuels can be produced from waste sources and contribute to sustainable mobility. The aim of this study was to investigate the blending of waste fatty acid in 10, 20, and 30 wt% into unrefined gas oils with different qualities during co-processing in a fixed-bed pilot-scale reactor on a commercial, sulphided nickel–molybdenum–alumina catalyst. The effect of the feedstock's fatty acid content and the process parameters on the hydrocarbon composition, sulphur content, aromatic content, and the performance properties of the main products have been investigated. During the experiments, the process parameters were varied in different ranges, such as temperatures of 300–360 °C, hydrogen/hydrocarbon volume ratio of 600 N m 3 /m 3 , pressure of 50 bar, and liquid hourly space velocity of 1.0–3.0 h −1 . From the results of these experiments, it was determined that fatty acids were completely converted. Under the selected favourable process parameters, which were 10 wt% fatty acid, 360 °C, and 1.0 h −1 , high-quality diesel fuel components with high hydrogen contents were produced. The excellent properties of the diesel fuel component, such as 4 mg/kg sulphur content, 1.3 wt% polycyclic aromatic content, and 13.7 wt% hydrogen content promoted cleaner combustion and reduced emissions. Therefore, the obtained renewable diesel fuel-blending component is more environmentally sustainable than conventional diesel fuels.

Original languageEnglish
Pages (from-to)304-312
Number of pages9
JournalEnergy Conversion and Management
DOIs
Publication statusPublished - Apr 1 2019

Fingerprint

Gas oils
Diesel fuels
Fatty acids
Processing
Hydrogen
Sulfur
Hydrocarbons
Alternative fuels
Feedstocks
Experiments
Catalysts
Liquids
Chemical analysis
Temperature

Keywords

  • Catalytic hydrogenation
  • Deoxygenation
  • Desulphurisation
  • Environmentally friendly

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

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title = "Co-processing a waste fatty acid mixture and unrefined gas oil to produce renewable diesel fuel-blending components",
abstract = "With the catalytic quality improvement of fatty acids, renewable alternative fuels can be produced from waste sources and contribute to sustainable mobility. The aim of this study was to investigate the blending of waste fatty acid in 10, 20, and 30 wt{\%} into unrefined gas oils with different qualities during co-processing in a fixed-bed pilot-scale reactor on a commercial, sulphided nickel–molybdenum–alumina catalyst. The effect of the feedstock's fatty acid content and the process parameters on the hydrocarbon composition, sulphur content, aromatic content, and the performance properties of the main products have been investigated. During the experiments, the process parameters were varied in different ranges, such as temperatures of 300–360 °C, hydrogen/hydrocarbon volume ratio of 600 N m 3 /m 3 , pressure of 50 bar, and liquid hourly space velocity of 1.0–3.0 h −1 . From the results of these experiments, it was determined that fatty acids were completely converted. Under the selected favourable process parameters, which were 10 wt{\%} fatty acid, 360 °C, and 1.0 h −1 , high-quality diesel fuel components with high hydrogen contents were produced. The excellent properties of the diesel fuel component, such as 4 mg/kg sulphur content, 1.3 wt{\%} polycyclic aromatic content, and 13.7 wt{\%} hydrogen content promoted cleaner combustion and reduced emissions. Therefore, the obtained renewable diesel fuel-blending component is more environmentally sustainable than conventional diesel fuels.",
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AB - With the catalytic quality improvement of fatty acids, renewable alternative fuels can be produced from waste sources and contribute to sustainable mobility. The aim of this study was to investigate the blending of waste fatty acid in 10, 20, and 30 wt% into unrefined gas oils with different qualities during co-processing in a fixed-bed pilot-scale reactor on a commercial, sulphided nickel–molybdenum–alumina catalyst. The effect of the feedstock's fatty acid content and the process parameters on the hydrocarbon composition, sulphur content, aromatic content, and the performance properties of the main products have been investigated. During the experiments, the process parameters were varied in different ranges, such as temperatures of 300–360 °C, hydrogen/hydrocarbon volume ratio of 600 N m 3 /m 3 , pressure of 50 bar, and liquid hourly space velocity of 1.0–3.0 h −1 . From the results of these experiments, it was determined that fatty acids were completely converted. Under the selected favourable process parameters, which were 10 wt% fatty acid, 360 °C, and 1.0 h −1 , high-quality diesel fuel components with high hydrogen contents were produced. The excellent properties of the diesel fuel component, such as 4 mg/kg sulphur content, 1.3 wt% polycyclic aromatic content, and 13.7 wt% hydrogen content promoted cleaner combustion and reduced emissions. Therefore, the obtained renewable diesel fuel-blending component is more environmentally sustainable than conventional diesel fuels.

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