School of Computing and Artificial Intelligence, Beijing Technology and Business University, Haidian District, Beijing 10048, PR China.
Bioenergy and Environment Science & Technology Laboratory, College of Engineering, China Agricultural University, Beijing 100107, PR China; Department of Power Supply and Renewable Energy Sources, National Research University TIIAME, 39 Kari Niyazov, 100000 Tashkent, Uzbekistan.
Bioresour Technol. 2024 Oct;409:131259. doi: 10.1016/j.biortech.2024.131259. Epub 2024 Aug 11.
The utilization of biomass pyrolysis is a crucial approach for sustainable development. This study used the typical biomass of pine (PI), rice husk (RH), and corn straw (ST) as feedstocks to evaluate the pyrolysis mechanisms, features and conversion mechanisms of the phenol tar product. The phenolic gaseous products were more trailing in ST, which mostly concentrated around 320-500 °C. Primary phenol tar is produced from lignin through the homolytic cleavage of β-O and α-O, and C-C bond breakage, primarily occurring before 550 °C. As the degree of aromatization increases, the oxygenates progressively deoxygenate, and the primary tar demethoxylates to form secondary tar as the temperature increases. The pyrolysis of cellulose produces H radicals, which aid the transformation of lignin into phenol tar. This study can provide a theoretical basis for biomass pyrolysis to select the appropriate process parameters to improve the quality of bio-oil and regulate phenol tar products.
生物质热解利用是可持续发展的关键途径。本研究以典型生物质松木（PI）、稻壳（RH）和玉米秸秆（ST）为原料，评估了酚焦油产物的热解机制、特性和转化机制。气态酚类产物在 ST 中更为滞后，主要集中在 320-500°C 左右。初级酚焦油是通过木质素的均裂裂解和 C-C 键断裂从木质素中产生的，主要在 550°C 之前发生。随着芳构化程度的增加，含氧化合物逐渐脱氧，初级焦油脱甲氧基形成二级焦油，随着温度的升高。纤维素热解产生 H 自由基，有助于木质素转化为酚焦油。本研究可为生物质热解选择合适的工艺参数提供理论依据，以提高生物油的质量和调节酚焦油产物。
