Intermediate Pyrolysis of Brewer’s Spent Grain: Impact of Gas Atmosphere

This work focuses on the impact of carrier gas quantity and quality pyrolytic products received from intermediate pyrolysis brewer’s spent grain. In this study, three types gases were tested: argon, nitrogen, carbon dioxide at temperatures 500, 600, 700 °C. On basis process conditions, yield was determined. The ultimate analysis char performed, for selected chars, combustion properties Gas chromatography organic fraction oil compounds Additionally, microscale investigation grain performed by thermogravimetric analysis. results showed that there no significant differences in product yields various atmospheres. Char changed only with temperature 28% 500 °C up to 19% According analysis, CO2 approximately 2% richer fact did not influence char. characterized mainly acids a maximum content 68% 600 an argon atmosphere acid concentration depended as follows line: Ar > N2 CO2.