Question

Q. Torrefaction and Bio-coal, sometimes seen in the news is related to:

• A. Thermal Power Plant
• B. Coking industry
• C. Stubble burning
• D. Coal found in the tropical mines

Answer 1

The correct option is C Stubble burning

Explanation:

Torrefaction is a thermal process that converts biomass into a coal-like material, which has better fuel characteristics than the original biomass. To overcome the issue of stubble burning India is testing Swedish technology — torrefaction that converts rice stubble into bio-coal. The process involves heating up straw, grass, sawmill residue and wood biomass to 250⁰ celsius - 350⁰ celsius. This changes the elements of the biomass into ‘coal-like’ pellets. These pellets can be used for combustion along with coal in applications like steel and cement industries.