article · International Journal of Energy Research
Biomass represents a promising clean energy source, encompassing both lignocellulosic and non-lignocellulosic materials. However, raw biomass typically suffers from high moisture content, low energy density, a tendency to absorb water, and poor storage and handling characteristics. Thermal pre-treatment through torrefaction addresses these drawbacks by lowering moisture, enhancing hydrophobicity, raising energy density, and improving grindability. Key operational parameters, including processing temperature, residence time, particle dimensions, and gas flow rates, directly affect the qualities of the resulting material. Furthermore, torrefied biomass can be densified into briquettes and pellets using specialised equipment, making it easier to handle and transport. Beyond general energy generation, upgraded biomass serves as a functional reducing agent within metallurgical operations, specifically for producing sponge iron from various grades of iron ore, including lean deposits.
Untreated biomass is bulky, damp, and prone to rotting, making it inefficient for industrial use. Pre-treating and compacting biomass through torrefaction and densification transforms raw organic waste into a reliable, energy-dense alternative to fossil fuels. This approach supports cleaner energy production and provides greener inputs for heavy industries such as metal manufacturing.
Potential commercial applications centre on energy producers and metallurgical facilities, specifically for manufacturing fuel pellets, briquettes, and sponge iron from varied iron ores. Based on established technologies and processing equipment described in peer-reviewed literature, the underlying processes are applied and existing rather than early-stage concepts. However, operational adoption depends on deploying appropriate densification machinery and carefully controlling processing variables such as temperature and gas flow.
AI-generated from the published abstract. Always read the original work before citing.
Torrefaction and densification are crucial steps in upgrading biomass as feedstock for energy generation and metallurgical applications. This paper attempts to discuss essential basics on biomass torrefaction and densification, which can propel developing nation to take full advantage of them. The most promising clean energy sources that have found applications in various areas are biomass materials, that is, both the lignocellulosic and non-lignocellulosic. However, high moisture contents, low energy density, hydrophilic nature, poor storage and handling properties are the major drawbacks limiting its usefulness. Therefore, torrefaction as one of the major thermal pre-treatment processes to upgrade biomass in terms of improved energy density, hydrophobic, moisture content and grindability has been discussed. The influence of temperature, residence time, particle sizes and gas flow rates on the properties of torrefied biomass has also been discussed. The advantages and disadvantages of various torrefaction technologies have also been highlighted. The possible areas of application of torrefied biomass especially densification into pellets and briquettes alongside the equipment required for it have been reviewed in this paper. The torrefied biomass can be deployed in the metallurgical industries as reducing agent in the development of sponge iron from iron ores of various grade including lean ones. The information gathered in this paper from peer-reviewed articles will reduce the burden of seeking to understand the preliminaries of torrefaction process and its importance.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1002/er.5884
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
