Wang Yali, Xu Ruting, Ma Mingzhe, Sun Kang, Jiang Jianchun, Sun Hao, Liu Shicai, Jin Yanren, Zhao Ting
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China.
National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, China.
Materials (Basel). 2023 Jul 26;16(15):5236. doi: 10.3390/ma16155236.
The effective utilization of charcoal and tar byproducts is a challenge for pyrolysis gasification of bamboo. Herein, the bamboo tar was modified via polymerization and acted as a new adhesive for the preparation of excellent bamboo-charcoal-derived molding activated carbon (MBAC). As compared with pristine tar and other adhesives, the aromatization of tar with phenol increased its molecular weight, oxygenic functional groups, and thermal stability, leading to the decreased blocking impact of charcoal pore and improved bonding and pyrolytic crosslinking effect between charcoal particles. These further contribute to the high mechanical strength, specific surface area, pore volume, and amount of oxygenic functional groups for fabricated MBAC. Owing to the high microporous volume of MBAC, it exhibited 385 mg·g toluene and 75.2% tetrachloride gas adsorption performances. Moreover, the pseudo-first-order, pseudo-second-order, and Bangham models were used to evaluate the kinetic data. The toluene adsorption process conforms to the Bangham kinetic model, suggesting that the diffusion mechanism of toluene adsorption mainly followed intraparticle diffusion.
竹材热解气化过程中，竹炭和焦油副产物的有效利用是一项挑战。在此，通过聚合反应对竹焦油进行改性，使其作为一种新型粘合剂用于制备性能优异的竹炭基成型活性炭（MBAC）。与原始焦油和其他粘合剂相比，焦油与苯酚的芳构化反应增加了其分子量、含氧官能团和热稳定性，减少了竹炭孔隙的堵塞影响，提高了竹炭颗粒之间的粘结和热解交联效果。这些进一步促成了所制备MBAC的高机械强度、比表面积、孔容和含氧官能团数量。由于MBAC具有高微孔体积，其对甲苯的吸附性能为385 mg·g，对四氯化物气体的吸附性能为75.2%。此外，采用准一级、准二级和Bangham模型对动力学数据进行评估。甲苯吸附过程符合Bangham动力学模型，表明甲苯吸附的扩散机制主要遵循颗粒内扩散。
