(593c) Optimization of Pyrolysis Parameters for Biochar Production

Pyrogenic Carbon Capture and Storage (PyCCS) is a method of carbon sequestration that is gaining popularity as a way to mitigate rising atmospheric CO₂ levels. Biochar production is maximized with slow pyrolysis and low temperatures. Pyrolysis is generally an endothermic process, but some research indicates that there are specific temperatures at which pyrolysis is exothermic. Pyrolysis enthalpy also varies by feedstock. As pyrolysis is conducted on a larger scale, the optimal temperature for pyrolysis to minimize energy use and maximize biochar production becomes increasingly important for both economic and environmental reasons. Pyrolysis time-temperature data at temperatures between 400°C and 800°C for several feedstocks to determine the effect of pyrolysis temperature and feedstock on enthalpy of the reaction. In addition to measuring temperature during pyrolysis, the composition of non-condensable gases was also measured to understand pyrolysis reaction changes as a function of pyrolysis temperature and feedstock.