Goktepeli, et al (2024) Alternative green application areas for olive pomace catalytic pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More obtained via marble sludge catalyst. Biodegradation. https://doi.org/10.1007/s10532-024-10088-z

In an innovative study, researchers explored the potential of converting olive pomace, a byproduct of olive oil production, into valuable biochar using marble sludge as a catalyst. Olive pomace, rich in organic matter and typically considered waste, poses environmental challenges due to its high acidity and organic content. Marble sludge, a byproduct of marble processing, similarly presents disposal issues but contains valuable inorganic compounds.

The process utilized is catalytic pyrolysis, where olive pomace is subjected to high temperatures in the absence of oxygen, with marble sludge introduced as a catalyst. This method aims to enhance the efficiency and quality of the biochar produced. The study varied the amount of marble sludge (10%, 20%, 30%, and 50%) and the pyrolysis temperatures (300°C, 500°C, and 700°C) to assess the impact on biochar properties and yields.

Results indicated that both the catalyst dosage and the temperature significantly influenced the yield and characteristics of the biochar. Higher temperatures generally reduced the quantity of biochar but increased its quality, making it suitable for various advanced applications. Biochars produced at higher temperatures exhibited increased porosityPorosity of biochar is a key factor in its effectiveness as a soil amendment and its ability to retain water and nutrients. Biochar’s porosity is influenced by feedstock type and pyrolysis temperature, and it plays a crucial role in microbial activity and overall soil health. Biochar More and surface area, properties desirable for uses such as in lithium-ion batteries and direct carbon solid oxide fuel cells (DC-SOFCs). Additionally, these biochars showed potential as alternative fuels due to their high calorific values and low sulfur content.

The study concludes that using marble sludge as a catalyst in the pyrolysis of olive pomace not only addresses waste management issues but also creates economically valuable and environmentally friendly products. This approach exemplifies a circular economy, turning industrial waste into a resource, and offers new green application areas for biochar, ranging from energy production to advanced material uses.