Conservation, environmental pollution and degradation, environmental impact assessment
Torrefaction to reduce stubble burning
What to study?
For Prelims: the technology.
For Mains: Significance for India.
Context: India tests Swedish torrefaction technology to reduce stubble burning.
What is torrefaction?
It is a thermal process used to produce high-grade solid biofuels from various streams of woody biomass or agro residues.
The end product is a stable, homogeneous, high quality solid biofuel with far greater energy density and calorific value than the original feedstock, providing significant benefits in logistics, handling and storage, as well as opening up a wide range of potential uses.
How it works?
- Biomass torrefaction involves heating the biomass to temperatures between 250 and 300 degrees Celsius in a low-oxygen atmosphere.
- When biomass is heated at such temperatures, the moisture evaporates and various low-calorific components (volatiles) contained in the biomass are driven out.
- During this process the hemi-cellulose in the biomass decomposes, which transforms the biomass from a fibrous low quality fuel into a product with excellent fuel characteristics.
Sources: the Hindu.