Abstract
Biofuels, alternative energy that is currently utilizing in many sectors, struggle as a coal coke substitute in the iron and steel industry. This research focuses on the development of pre-carbonized solid bio-fuel (bio-coke), which can be implemented in the iron and steel industry. The biochemical structure of the bio-coke product that changes after the production process is essential foundational information that has an impact on bio-coke characteristics and functions. Notably, in the mass-production scale, when various types of biomass are mixed as feeding raw materials. Influences of lignocellulose (hemicellulose, and lignin) fraction in the structural bonding is a promising range that needed to be explored. The ATR-FTIR spectroscopy observed the fundamental chemical structure of the Japanese cedar based bio-coke with various additional lignin and hemicellulose ratio. Different additional conditions are 0, 2, 5, 8, 10, and 15 wt. % for both lignin and hemicellulose. The collected spectra were analyzed using the mathematical function, second derivative, which revealed the quantitative variation of the observed bio-coke samples. In O-H stretching of intra-chain crystalline cellulose, a higher amount of lignin orderly decreased the peak at 3334 cm-1 (O3-H3…O5 position). While increasing the hemicellulose ratio from 0 to 5 wt. %, rose the intensity of a peak at 3273 cm-1 (O2-H2…O6), and dropped at a higher rate.
