Journal
BIORESOURCE TECHNOLOGY
Volume 284, Issue -, Pages 325-332Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.03.149
Keywords
Lignin; PVC; One-step pyrolysis; KOH activation; Porous carbon; Toluene sorption
Funding
- Startup Foundation for Introducing Talents of NUIST [2243141501046]
- National Natural Science Foundation of China [21607079]
- Natural Science Foundation of Jiangsu Higher Education Institutions of China [16KJB610012]
- Six Talent Peaks Project in Jiangsu Province of China [JNHB-057]
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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-BET). By co-pyrolysis of biomass with KOH, the S-BET of bio-carbon was significantly improved. The addition of PVC can further enhance the S-BET. Additionally, the S-BET 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(-1)) 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.
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