Solid Biomass, a renewable energy source, has gained significant traction recently for its sustainable and Eco-friendly characteristics. Whether dealing with loose or densified Biomass, efficient storage is crucial for optimizing energy production; in this guide, we’ll explore the key factors to consider when storing solid Biomass and provide practical insights to ensure efficiency and safety.

Solid Biomass

Area Requirements of Solid Biomass

The fuel density influences the amount of space needed for biomass storage. Loose Biomass typically requires a larger storage area compared to densified Biomass. Though the space requirement depends on the bulk density of the fluid, moisture content, etc, densified fuels would require approximately 1m2 per ton of fuel storage and loose fuels may require 4m2 per ton of fuel.

Storage Conditions

Storing the solid Biomass in covered spaces protected from rain is essential. Environmental exposure, such as rain or humidity, can degrade the biomass quality and compromise energy output. Implementing proper storage conditions helps prevent moisture absorption and ensures a consistent fuel quality for combustion. However, proper ventilation is necessary to prevent dust accumulation, posing health or fire hazards under certain conditions. Storing liquid fossil fuels, on the other hand, requires specialized containers to prevent leaks and spills that can lead to environmental contamination or fire hazards. Storage areas must be well-ventilated and equipped with fire suppression systems. There’s also a need for secondary containment to catch spills or leaks.

Flammability & Ignitability:

When comparing the safety aspects of storing solid Biomass versus fluid fossil fuels (like gas and diesel), several factors come into play, including flash points, self-ignition temperatures, and storage requirements. Here’s a detailed comparison:

1. Flash Point: The flash point of a fuel represents the temperature at which the fuel will ignite in the presence of a flash or spark. Fuels with a flash point less than 37.8 °C (100.0 °F) are called flammable, whereas fuels with a flash point above that temperature are called combustible. Liquid fossil fuels like diesel and gasoline have relatively low flame points. For example, diesel’s flame point is approximately 52°C (126°F), and gas’s is even lower, around —188°C (-306°F). It means these fuels can ignite at relatively low temperatures, posing a significant fire risk if not stored correctly. Solid biomass materials like pellets, Astillas, or agricultural residues generally have a much higher flame point. Biomass materials must usually be exposed to temperatures exceeding 200°C (392°F) before they begin to combust. This higher ignition threshold makes solid Biomass safer to store under normal conditions.


2. Self-Ignition Point: Self-ignition temperature represents the temperature at which the fuel will ignite without a flash or spark. The self-ignition temperature (or auto-ignition temperature) of diesel is around 210°C (410°F), and for gas, it’s about 480°C (896°F). These temperatures are relatively low compared to many solid biomasses, which means there’s a risk of spontaneous combustion if the fuels are exposed to high temperatures or improperly stored. The self-ignition temperature for solid Biomass varies depending on the type but is generally higher than that of fluid fossil fuels. For example, the self-ignition temperature for wood pellets is approximately 300°C (572°F) or higher. This higher ignition point reduces the risk of spontaneous combustion during storage.


While both solid Biomass and fluid fossil fuels have their safety considerations, solid Biomass tends to pose fewer risks regarding storage safety and environmental impact. The higher flame and self-ignition points of solid Biomass reduce the risk of accidental ignition, making it generally safer to store. Solid biomass storage doesn’t require as stringent containment measures as fluid fossil fuels, further reducing potential environmental risks. However, it’s crucial to manage biomass storage to minimize dust and ensure proper ventilation to avoid dust explosion hazards.

One comment

  1. We have a briqueting plant of 2 tons/hr capacity Rajkot type of 90 mm briquettes. We are 180 Km from Hyderabad and about 400 Km from Poona. Regular full trucks are available. The agro residue available with is Bengal gram, Soya, Towar. Paddy Straw, maize stalk, cotton stalk, sugarcane bagase, Sugarcane leaves. We want to make briquets as guided by you and want to be a supplier to you and deliver at your clients place. We have a storage capacity 5,400 sft and can increase by another 8,000 sft to maintain the supply regularly. We are willing to convert this machine to pellets and add necessary prepratory equipment to make pellets. Please mail us if you would be interested.

Leave a Reply

Your email address will not be published. Required fields are marked *