Utilisation of lignin-based biocarbon in pyrometallurgical applications

This is a compilation thesis which focuses on the utilization of lignin-based biocarbon in metallurgical applications. Lignin is a complex plant-based polymer which is produced as a side stream in many processes of bio product industry. Currently lignin-rich side streams are being mostly utilized as a fuel in energy generation. The objective of this research work is to bring added value to the hydrolysis lignin which is being generated in second generation bio-ethanol production. This would also promote the circular economy between the industries and on the other hand, reduce the level of fossil-based carbon use within the metal industry.
The thesis consists of two different branches of research: the utilization of lignin as a part of coking blend in metallurgical coke production, and the utilization of pyrolysed lignin-based metallurgical biocarbon as a substitution of fossil-based carbon in metallurgical applications. The factors affecting the formation of different carbon products and the most important properties from the perspective of their potential utilization in metallurgical applications are being investigated in this thesis.