一步热解木质素和聚氯乙烯合成多孔碳及其对甲苯的吸附应用。
One-step pyrolysis of lignin and polyvinyl chloride for synthesis of porous carbon and its application for toluene sorption.
机构信息
School of Environmental Science and Engineering, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, China.
School of Environmental Science and Engineering, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, China.
出版信息
Bioresour Technol. 2019 Jul;284:325-332. doi: 10.1016/j.biortech.2019.03.149. Epub 2019 Apr 1.
The aim of this work aims to synthesize the high performance porous carbons from lignin and rice husk (RH) via one-step pyrolysis with KOH and PVC. And those porous carbons were evaluated for toluene sorption. The unactivated biochars had ultralow specific surface area (S). By co-pyrolysis of biomass with KOH, the S of bio-carbon was significantly improved. The addition of PVC can further enhance the S. Additionally, the S of lignin-carbons was higher than that of RH-carbons. It was attributed to the destruction of pore structures in the RH chars with high salts by the washing process. Compared with the RH carbons, the lignin carbons had a higher micro-porosity. As for toluene sorption, the maximum breakthrough time (2195 min) and sorption capacity (263.4 mg g) were achieved using LPKC. The textural properties (e.g., pore volume, micro-porosity, and hierarchically porous structure) can take significant effects on the sorption process.
这项工作的目的是通过一步热解 KOH 和聚氯乙烯从木质素和稻壳 (RH) 合成高性能多孔碳，并评估这些多孔碳对甲苯的吸附性能。未经活化的生物炭具有超低的比表面积 (S)。通过生物质与 KOH 的共热解，生物碳的 S 得到了显著提高。添加 PVC 可以进一步提高 S。此外，木质素碳的 S 高于 RH 碳的 S。这归因于洗涤过程中高盐 RH 炭中孔结构的破坏。与 RH 碳相比，木质素碳具有更高的微孔。对于甲苯的吸附，使用 LPKC 可达到最大穿透时间 (2195 分钟) 和吸附容量 (263.4mg g)。吸附过程对结构性能（如孔体积、微孔和分级多孔结构）有显著影响。
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