Potnuri & Rao (2024) Synthesis and Characterization of BiocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More Obtained from Microwave-Assisted Copyrolysis of Torrefied Sawdust and Polystyrene. ACS Sustainable Resource Management. https://doi.org/10.1021/acssusresmgt.4c00195

A recent study by Ramesh Potnuri and Chinta Sankar Rao explores the production and characterization of biochar derived from torrefied sawdust and polystyrene through microwave-assisted copyrolysis. The process combines pretreated biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More and plastic waste, utilizing microwave technology for efficient thermal decomposition.

Torrefaction of sawdust, a mild pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More method, was used at varying temperatures (125-175°C) to reduce moisture and improve the material’s energy density. Potassium hydroxide (KOH) acted as a catalyst to enhance biochar yield and quality. Graphite powder served as a susceptor, allowing precise control of pyrolysis temperatures.

The study found that biochar yields increased as torrefaction temperatures and KOH loadings were raised. The maximum biochar yield reached 29% at the highest torrefaction temperature (175°C) and catalyst loading (15 g). Analytical techniques, including FTIR, XRD, SEM, and BET, were used to evaluate the biochar’s physical and chemical properties. These revealed a high surface area and the presence of functional groups suitable for various applications, such as pollutant adsorptionBiochar has a remarkable ability to attract and hold onto pollutants, like heavy metals and organic chemicals. This makes it a valuable tool for cleaning up contaminated soil and water.   More and soil remediation.

The research highlights the potential of microwave-assisted copyrolysis for waste valorization, offering an efficient and sustainable method to produce biochar from a mix of biomass and plastic waste.