Characterization and reactivity of charcoal from high temperature pyrolysis (800–1600 °C)

Abstract

This study presents the effect of wood origin and heat treatment temperature on the CO 2 reactivity, nanostructure and carbon chemistry of chars prepared at 800, 1200, and 1600 • C in slow pyrolysis reactors. The structure of charcoal was characterized by transmission electron microscopy, Raman spectroscopy, mercury intrusion porosimetry and N 2 adsorption. The CO 2 reactivity of char was investigated by thermogravimetric analysis. Results showed that spruce and oak chars have similar reactivity at all heat treatment temperatures.The oak char prepared at 1600 • C contained long and flat graphene layers and interplanar distance that is similar to graphite and thus, was more ordered than the spruce char. The TEM analysis showed that charcoal had structural characteristics of non-graphitizing carbon. Thus, increasing heat treatment temperature increases the graphitization of char structure, leading to the reactivity that is nearly similar to that of low reactive metallurgical coke.

Characterization of woodstove briquettes from torrefied biomass and coal

“…In addition, the 3D imaging analysis using XµCT technique and mercury intrusion porosimetry both showed that coal particles in a briquette were less porous and smaller in size than olive stones particles. The increase in porosity and decrease in particle size of olive stones led to greater reactivity compared to anthracite, confirming the previous results of Surup et al [69].…”

Electrical Resistivity of Carbonaceous Bed Material at High Temperature

“…Charcoal has a higher porosity, lower mechanical stability, and higher reactivity than fossil reducing agents [3,8]. The high CO 2 reactivity of charcoal can increase its consumption in the burden by the Boudouard reaction [17]. Approximately 500,000 tonnes of CO 2 emissions generated by ferromanganese and silicomanganese production are due to the Boudouard reaction [18], corresponding to~30% of the annual emissions.…”

Structural and Thermal Characterization of Novel Organosolv Lignins from Wood and Herbaceous Sources

“…The main difference in O 2 and CO 2 reactivity of lignin samples was observed in the higher maximum temperature of PL compared to other lignin samples due to the shift of the DTG peak to the higher temperatures. The DTG curves show a double broad peak that indicates a heterogeneous lignocellulosic mixture with respect to O 2 and CO 2 reactivity [50,51].…”