Moving towards green lubrication: tribological behavior and chemical characterization of spent coffee grounds oil

ABSTRACTWith the EU aiming for net-zero greenhouse gas emissions by 2050, conventional production cycles must be transformed into cradle-to-cradle approaches. Spent coffee grounds are often dumped in landfills, with their potential as high-quality feedstock for biofuel or bio-lubricant production. S...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Jessica Pichler [verfasserIn] Rosa Maria Eder [verfasserIn] Lukas Widder [verfasserIn] Markus Varga [verfasserIn] Martina Marchetti-Deschmann [verfasserIn] Marcella Frauscher [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Tribology sustainability recycling life-cycle assessment biolubrication

Übergeordnetes Werk:	In: Green Chemistry Letters and Reviews - Taylor & Francis Group, 2015, 16(2023), 1
Übergeordnetes Werk:	volume:16 ; year:2023 ; number:1

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.1080/17518253.2023.2215243

Katalog-ID:	DOAJ101021887

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callnumber-first	Q - Science
author	Jessica Pichler
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topic_title	QD1-999 Moving towards green lubrication: tribological behavior and chemical characterization of spent coffee grounds oil Tribology sustainability recycling life-cycle assessment biolubrication
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title	Moving towards green lubrication: tribological behavior and chemical characterization of spent coffee grounds oil
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title_full	Moving towards green lubrication: tribological behavior and chemical characterization of spent coffee grounds oil
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title_sort	moving towards green lubrication: tribological behavior and chemical characterization of spent coffee grounds oil
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title_auth	Moving towards green lubrication: tribological behavior and chemical characterization of spent coffee grounds oil
abstract	ABSTRACTWith the EU aiming for net-zero greenhouse gas emissions by 2050, conventional production cycles must be transformed into cradle-to-cradle approaches. Spent coffee grounds are often dumped in landfills, with their potential as high-quality feedstock for biofuel or bio-lubricant production. Spent coffee grounds oil (SCGO) was investigated for its physicochemical properties while having more free acid groups compared to the reference polyalphaolefin 8 (PAO 8), which may cause faster oxidation. TGA results displayed comparable thermal stability of SCGO and PAO 8 for inert/oxidative atmosphere. The oil composition was characterized by ATR-FTIR, elemental analysis, and GC-EI-MS, where a higher oxygen content was found for SCGO, referring to functional ester/acid groups. The tribological behavior of SCGO was studied as lubricant base oil and as a 5% additive in PAO 8. The condition of fresh and tribologically used oils was investigated with High-Resolution-ESI-MS, and the worn surfaces were evaluated by light microscopy and topographic analysis. The results showed a superior friction coefficient of pure SCGO (µ = 0.092) to PAO 8 (µ = 0.129). The 5% SCGO additive in PAO 8 (µ = 0.095) could significantly reduce friction compared to pure PAO 8 on an unpolished 100Cr6 surface.
abstractGer	ABSTRACTWith the EU aiming for net-zero greenhouse gas emissions by 2050, conventional production cycles must be transformed into cradle-to-cradle approaches. Spent coffee grounds are often dumped in landfills, with their potential as high-quality feedstock for biofuel or bio-lubricant production. Spent coffee grounds oil (SCGO) was investigated for its physicochemical properties while having more free acid groups compared to the reference polyalphaolefin 8 (PAO 8), which may cause faster oxidation. TGA results displayed comparable thermal stability of SCGO and PAO 8 for inert/oxidative atmosphere. The oil composition was characterized by ATR-FTIR, elemental analysis, and GC-EI-MS, where a higher oxygen content was found for SCGO, referring to functional ester/acid groups. The tribological behavior of SCGO was studied as lubricant base oil and as a 5% additive in PAO 8. The condition of fresh and tribologically used oils was investigated with High-Resolution-ESI-MS, and the worn surfaces were evaluated by light microscopy and topographic analysis. The results showed a superior friction coefficient of pure SCGO (µ = 0.092) to PAO 8 (µ = 0.129). The 5% SCGO additive in PAO 8 (µ = 0.095) could significantly reduce friction compared to pure PAO 8 on an unpolished 100Cr6 surface.
abstract_unstemmed	ABSTRACTWith the EU aiming for net-zero greenhouse gas emissions by 2050, conventional production cycles must be transformed into cradle-to-cradle approaches. Spent coffee grounds are often dumped in landfills, with their potential as high-quality feedstock for biofuel or bio-lubricant production. Spent coffee grounds oil (SCGO) was investigated for its physicochemical properties while having more free acid groups compared to the reference polyalphaolefin 8 (PAO 8), which may cause faster oxidation. TGA results displayed comparable thermal stability of SCGO and PAO 8 for inert/oxidative atmosphere. The oil composition was characterized by ATR-FTIR, elemental analysis, and GC-EI-MS, where a higher oxygen content was found for SCGO, referring to functional ester/acid groups. The tribological behavior of SCGO was studied as lubricant base oil and as a 5% additive in PAO 8. The condition of fresh and tribologically used oils was investigated with High-Resolution-ESI-MS, and the worn surfaces were evaluated by light microscopy and topographic analysis. The results showed a superior friction coefficient of pure SCGO (µ = 0.092) to PAO 8 (µ = 0.129). The 5% SCGO additive in PAO 8 (µ = 0.095) could significantly reduce friction compared to pure PAO 8 on an unpolished 100Cr6 surface.
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title_short	Moving towards green lubrication: tribological behavior and chemical characterization of spent coffee grounds oil
url	https://doi.org/10.1080/17518253.2023.2215243 https://doaj.org/article/676d6c12e4c946cca8df552cfadb9f76 https://www.tandfonline.com/doi/10.1080/17518253.2023.2215243 https://doaj.org/toc/1751-8253 https://doaj.org/toc/1751-7192
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author2	Rosa Maria Eder Lukas Widder Markus Varga Martina Marchetti-Deschmann Marcella Frauscher
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