Can diesel-fueled generators run on biodiesel without modifications?

Compatibility Requirements

Diesel generators can generally run on biodiesel blends, but compatibility issues may arise when using higher percentages of biodiesel. Typically, B20 (20% biodiesel, 80% petrodiesel) is considered a safe blend for most diesel generators. However, using higher blends like B50 or B100 may require adjustments to the generator’s fuel system and engine design. It’s essential to consult the manufacturer’s guidelines for specific recommendations.

Biodiesel Properties and Blending

Biodiesel has distinct properties compared to petrodiesel, such as a higher cetane number and lower energy density. When blending biodiesel with petrodiesel, it’s crucial to consider the cetane number and adjust the blend accordingly. A higher cetane number can help improve engine performance and reduce emissions. For example, a B20 blend with a cetane number of 50-60 can be a good starting point. However, using a blend with a lower cetane number can lead to engine knock, decreased performance, and potentially cause engine damage.

Handling and Storage Considerations

When handling and storing biodiesel, it’s essential to consider its unique properties. Biodiesel has a lower energy density and higher viscosity than petrodiesel, which can affect fuel pumping and injection systems. Additionally, biodiesel can be more prone to oxidation, leading to the formation of gums and sediments. To mitigate these issues, it’s recommended to use a fuel additive specifically designed for biodiesel and to filter the fuel before storage. This can help maintain fuel quality, prevent clogging, and ensure smooth engine operation.