A study published in Materials Today Sustainability by Davide Baldassin, Lilia Longo, and colleagues explores the co-pyrolysis of leather shaving waste and rice husk to create a 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 catalyst. This novel catalyst achieved a 96% yield of benzyl alcohol, a valuable industrial chemical, in the hydrogenation of benzaldehyde.

The key innovation of this study is the co-pyrolysis of leather shaving waste and rice husk. The resulting biochar, can be used as a catalyst or as a support for other catalysts.

In this case, the researchers hypothesized that combining leather waste and rice husk during 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 could create a “hybrid” biochar with enhanced catalytic properties. They compared this hybrid biochar to biochars derived from each waste material separately.The study focused on the use of these biochar materials to support palladium, a metal widely used in catalysis. The resulting catalysts were tested in the hydrogenation of benzaldehyde, a reaction important in the production of various chemicals.

. The co-pyrolysis process created a material with a unique combination of properties and these properties, derived from the synergistic interaction of leather waste and rice husk, contributed to the improved catalytic activity and selectivity of the hybrid catalyst.The hybrid catalyst, Pd/ARL, achieved a high yield of the desired product, benzyl alcohol (96%), and effectively suppressed side reactions.

This study demonstrates the potential of co-pyrolysis to transform waste materials into valuable catalysts. By combining the properties of different waste streams, it’s possible to design catalysts with tailored properties for specific chemical reactions. This approach offers a sustainable and cost-effective way to manage waste while simultaneously producing valuable chemical products.

Source: Baldassin, D., Longo, L., Menegazzo, F., Bittencourt, C., Padervand, M., & Signoretto, M. (2025). Co-pyrolysis of leather shaving waste and rice husk for hybrid palladium-supported biochar catalysts in hydrogenation reactions. Materials Today Sustainability, 31, 101127.