Paper Title
Analysis the Key Properties of Renewable Oils as a Valuable Fuel for Internal Combustion Engines

Abstract
The constantly increasing demand for energy resources and the implementation of stricter exhaust emission standards are conducive to the development of the renewable energy sector. The assumptions regarding the raw material for the production of alternative fuels are based on two conditions: high availability and affordability. Waste from various sources meets these criteria exceptionally well. Currently, second-generation biofuels such as hydrotreated vegetable oils (HVO) and pyrolysis oils (PO) are garnering significant interest from researchers worldwide. HVO is produced from biomass derived from agricultural, forestry waste, and the food industry. Pyrolysis oils can be produced from both organic and inorganic waste, with examples including tire pyrolysis oil (TPO) from end-of-life tires and plastic pyrolysis oil (PPO) from plastic waste. The multitude of raw materials for the production of bio-oils poses challenges in identifying their properties. Therefore, the work focused on conducting an extensive analysis of the properties of the most popular oils from renewable sources, with particular emphasis on their origin Key properties for their use as fuel for internal combustion engines were examined. The scope of the research included determining: cetane number, calorific value, flash point, water content, density, distillation parameters and aromatic compound content. The obtained results were compared with the results for diesel oil available in retail and referred to the currently applicable standards for combustion engines. Keywords - Biofuels, Pyrolysis Oil, Combustion, Exhaust Emission.