Production of renewable phenols from corn cob using catalytic pyrolysis over self-derived activated carbons prepared with torrefaction pretreatment and chemical activation

Dengle Duan, Xiaoyong Dong, Qin Wang, Yayun Zhang, Roger Ruan, Yunpu Wang, Hanwu Lei

Research output: Contribution to journalArticlepeer-review

Abstract

The present work unveiled that the combination of chemical activation and torrefaction pretreatment was a promising approach for improving catalytic performance of activated carbon (AC) during conversion of corn cob into phenols. The characterization results demonstrated that P-containing functional groups (bands between 1000 and 1200 cm−1) were imbedded into AC samples successfully. The increase in acid concentration and carbonization temperature could improve the porosity of as-prepared ACs. GC/MS results revealed that the selectivity of phenols was boosted (from 19.0% to 79.3%) during pyrolysis of corn cob over torrefaction pretreated AC catalyst. The high carbonization temperature (from 369 °C to 581 °C) and H3PO4 concentration (from 26.7% to 83.3%) favored the selectivity of phenols attained. The optimal condition for phenols selectivity (79.3%) was achieved at a carbonization temperature of 550 °C with H3PO4 concentration of 75%. The current study may provide an efficient pathway of converting agriculture waste corn cob into AC catalyst and phenols-enriched bio-oil, simultaneously, which will advance the utilization of renewable agriculture biomass.

Original languageEnglish (US)
Article number126507
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume623
DOIs
StatePublished - Aug 20 2021

Bibliographical note

Funding Information:
This study was supported by National Natural Science Foundation of China (No. 21766019 , 21878137 ), Guangzhou Science and Technology Program of China (No. 2019002 ), Heyuan Science and Technology Program of China (No. 201704030084 ), and the Agriculture and Food Research Initiative of National Institute of Food and Agriculture, United States Department of Agriculture (No. 2016-67021-24533 , 2018-67009-27904 ).

Publisher Copyright:
© 2021

Keywords

  • Activated carbon
  • Corn cob
  • Phenols
  • Torrefaction pretreatment

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