In the quest for sustainable energy solutions, researchers from the University of Córdoba in Spain have turned their attention to an often-overlooked resource: aromatic seed residues. These residues are a by-product of essential oil extraction from Mediterranean aromatic and medicinal plants, and their potential for energy valorization could contribute significantly to the circular economy.
The study, led by Pablo Roig-Madrid and his colleagues, investigates the energy potential of 16 different types of aromatic seed residues. With the growing demand for natural bioactive ingredients, the production of aromatic crops is expanding, leaving behind large amounts of residual biomass that are currently underutilized. The researchers aim to determine the suitability of these residues for solid biofuel production, pyrolysis for bio-oil generation, and biochar applications.
The team conducted a comprehensive thermochemical, elemental, and structural assessment of the aromatic seed residues. They analyzed the samples using standardized ISO methodologies to ensure the results are comparable and meet industrial fuel quality requirements. The findings indicate that these residues have significant potential for energy valorization. They can be used to produce solid biofuels like pellets and briquettes, which can be used for heating and electricity generation. Additionally, the residues can undergo pyrolysis to generate bio-oil, a liquid fuel that can be used in various applications, including power generation and transportation. The biochar produced as a by-product of pyrolysis can be used for soil amendment, carbon sequestration, and other industrial applications.
The research, published in the journal Fuel, highlights the opportunities for renewable energy generation, waste minimization, and the development of value-added bioenergy products from aromatic seed residues. By incorporating these residues into thermochemical conversion routes, the energy sector can take a step towards a more sustainable and circular economy. The study provides a valuable resource for the energy industry, offering a detailed assessment of the properties and potential applications of aromatic seed residues as a renewable energy source.
This article is based on research available at arXiv.