Green energy from bio-waste – study on the properties of olive stones for use as fuel in small-scale heating systems

• Autorzy: Mirowski Tomasz , Pacura Wiktor , Domagała Julia

Identyfikatory

DOI

10.33223/epj/205013

Warianty tytułu

PL

Zielona energia z bioodpadów – badanie właściwości pestek oliwek do wykorzystania jako paliwa w małych systemach grzewczych

• Języki publikacji: EN

Abstrakty

EN

This study explores the potential of olive stones as a renewable biofuel for small-scale heating systems. Olive oil production generates approximately 4 million tonnes of olive stones annually, often classified as waste. By analyzing their elemental and physical properties, this research evaluates the energy potential of olive stones, offering a sustainable alternative to traditional fuels. A sample from Spain underwent elemental, technical, and thermogravimetric analyses. The results revealed a high calorific value of 18.26 MJ/kg, which can be attributed to the considerable carbon (47.4%) and hydrogen (6.1%) content, along with minimal sulfur levels. This composition makes olive stones a promising low-emission fuel. Thermogravimetric analysis showed that pyrolysis occurs in four phases, with 65% of the mass lost between 170 and 866°C, indicating the material’s suitability for thermal energy applications. The findings suggest that olive stones hold significant potential for use in renewable energy systems. Their utilization aligns with circular economy principles, transforming waste into energy and reducing environmental impact. Olive stones have low ash and moisture content, improving their efficiency as a fuel. Their high volatile matter content also supports energy-efficient gasification processes, further enhancing their energy potential. In conclusion, this study confirms that olive stones are a viable alternative to fossil fuels, particularly for small-scale heating applications. With their high energy value, low emissions, and minimal residual waste, olive stones offer a sustainable and efficient energy solution. Their use not only supports green energy production but also contributes to reducing the carbon footprint and promoting sustainability.

PL

Niniejsze badanie analizuje potencjał pestek oliwek jako odnawialnego biopaliwa do małoskalowych systemów grzewczych. Produkcja produktów pochodnych z oliwek, takich jak oliwa z oliwek, generuje znaczne ilości produktów ubocznych, rocznie powstaje około 4 milionów ton pestek oliwek, które często są traktowane jako odpady. Analiza właściwości fizykochemicznych pestek oliwek zapewnia informacje na temat możliwości wykorzystania ich jako źródła energii. Próbka, pochodząca z Hiszpanii, została poddana analizie elementarnej, technicznej oraz termograwimetrycznej. Wyniki wykazały, że pestki oliwek charakteryzują się wysoką wartością opałową (18,26 MJ/kg), co wynika z ich znacznej zawartości węgla (47,4%) i wodoru (6,1%) oraz niskiej zawartości siarki, czyniąc je obiecującym paliwem niskoemisyjnym. Analiza termograwimetryczna ujawniła, że piroliza przebiega w czterech wyraźnych fazach, z utratą 65% masy w zakresie temperatur od 170 do 866°C, co potwierdza przydatność materiału w procesach wytwarzania energii cieplnej. Wnioski z badania wskazują, że pestki oliwek, jako łatwo dostępny produkt uboczny, mają znaczący potencjał do wykorzystania w systemach energii odnawialnej, wspierając tym samym cele zrównoważonego rozwoju i gospodarki obiegu zamkniętego.

Słowa kluczowe

EN

olive stone; biofuel; renewable energy; pyrolysis; circular economy

PL

pestki oliwek; biopaliwo; energia odnawialna; piroliza; gospodarka o obiegu zamkniętym

• Wydawca: Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
• Czasopismo: Polityka Energetyczna
• Rocznik: 2025
• Tom: T. 28, z. 2
• Strony: 135--150
• Opis fizyczny: Bibliogr. 27 poz., fot., wykr.

Twórcy

autor

Mirowski Tomasz

• The Department of Renewable Energy and Environmental Research, Mineral and Energy Economy Research Institute of the Polish Academy of Sciences, Poland

• https://orcid.org/0000-0003-4897-9142

autor

Pacura Wiktor

• The Department of Renewable Energy and Environmental Research, Mineral and Energy Economy Research Institute of the Polish Academy of Sciences, Poland

• https://orcid.org/0000-0002-0643-9933

autor

Domagała Julia

• The Department of Renewable Energy and Environmental Research, Mineral and Energy Economy Research Institute of the Polish Academy of Sciences, Poland

• https://orcid.org/0009-0003-7245-4909

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