State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Bioresour Technol. 2022 Jul;355:127218. doi: 10.1016/j.biortech.2022.127218. Epub 2022 Apr 22.
In this study, ammonium borate was used as an additive to inhibit lignin softening during the pyrolysis process, and the influence on the pyrolysis process and product characteristics were investigated with potential mechanism being explored in depth. Results showed that with boron addition, glassy transition temperature and thermal stability of lignin increased, and the yield of gas and liquid decreased, while the content of CO, CO and H increased. Simultaneously, liquid oil showed higher content of simple phenols, especially the diphenols which the maximum reached 80% with 3%BN at 650 ℃, while the yield of heavy components (300 ∼ 400 Da) decreased. With regard to B-doped char, oxygenic groups and specific surface area (509 m/g of 5%BN at 650 ℃) increased greatly. Increasing temperature promoted the transformation of B doping form from BCO to BCO.
在这项研究中，硼酸铵被用作添加剂来抑制木质素在热解过程中的软化，深入探讨了其对热解过程和产物特性的影响及潜在的作用机制。结果表明，随着硼的加入，木质素的玻璃化转变温度和热稳定性增加，气体和液体的产率降低，而 CO、CO 和 H 的含量增加。同时，液体油表现出更高含量的简单酚类，特别是二酚类，在 650℃下添加 3%BN 时最大达到 80%，而重质组分（300∼400Da）的产率降低。对于硼掺杂炭，含氧基团和比表面积（在 650℃下 5%BN 的比表面积为 509m/g）大大增加。升高温度促进了 B 掺杂形式从 BCO 向 BCO 的转变。
