Rani, et al (2024) Biochar Production Using a Flexible Counter Flow Multi-Baffle (F-COMB) Reactor. Journal of Cleaner Production. https://doi.org/10.1016/j.jclepro.2024.142875

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A new study published in the Journal of Cleaner Production introduces the Flexible Counter Flow Multi-Baffle (F-COMB) reactor, an innovative solution for efficient and scalable biochar production. Biochar, a form of carbon capture and storage, plays a crucial role in mitigating climate change by sequestering carbon dioxide from the atmosphere.

The F-COMB reactor, designed for continuous biochar production, operates at a pilot scale of 1 ton per day. It employs a unique design featuring multiple baffles that enhance the contact between feedstock and hot gas through vortex mixing. This configuration results in high energy efficiency and precise control over the pyrolysis process, including temperature, retention time, gas flow rate, and feedstock loading.

Traditional biochar production methods, such as batch-type slow pyrolysis and rotary kiln reactors, often suffer from high operational costs, inefficient heat transfer, and scalability issues. The F-COMB reactor addresses these challenges by ensuring efficient heat distribution and reducing the residence time of feedstock, making it economically viable for larger-scale operations.

The study highlights the successful production of wood pellet biochar using the F-COMB reactor, demonstrating its potential for significant scale-up. Continuous production was achieved with three flexible baffle configurations, showcasing the reactor’s adaptability and effectiveness.

As the demand for biochar is projected to exceed 150 million tons annually by 2050, the F-COMB reactor represents a promising advancement in biochar technology, offering a sustainable and scalable solution to support global carbon reduction efforts and enhance soil health.