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Bioresour Technol. 2019 Aug;286:121390. doi: 10.1016/j.biortech.2019.121390. Epub 2019 Apr 29.

The mechanism of wet/dry torrefaction pretreatment on the pyrolysis performance of tobacco stalk.

Author information

1
College of Materials and Energy in South China Agricultural University, Guangzhou 510640, China.
2
College of Materials and Energy in South China Agricultural University, Guangzhou 510640, China. Electronic address: jiangenchen200801@hotmail.com.
3
College of Materials and Energy in South China Agricultural University, Guangzhou 510640, China. Electronic address: xuxiwei200801@hotmail.com.

Abstract

In this work, the influence of dry/wet torrefaction with additives on the pyrolysis performance was investigated. The results showed that the content of phenols and ketones (62% and 42%) was improved and the content of acids decreased from 35% to 4% due to the increase of lignin content in torrefied char. Moreover, the content of aromatic hydrocarbon reached 22%. The mechanism showed that the conversion of "CO/CO" into states of "aromatic CC/CC", the removal of hemicellulose and the formation of pseudo-lignin during wet/dry torrefaction were the key factors for the enrichment of aromatic hydrocarbon. The research supplied an effective and original method for obtaining high value aromatic chemicals from the agricultural and forestry waste via the wet/dry torrefaction pretreatment combining with pyrolysis.

KEYWORDS:

Aromatic hydrocarbon; Mechanism; Pseudo-lignin; Pyrolysis; Wet/dry torrefaction pretreatment

PMID:
31078074
DOI:
10.1016/j.biortech.2019.121390
[Indexed for MEDLINE]

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