Role of porous structure and active O-containing groups of activated biochar catalyst during biomass catalytic pyrolysis

Haiping Yang, Zhiqun Chen, Wei Chen, Yingquan Chen, Xianhua Wang and Hanping Chen

Energy, 2020, vol. 210, issue C

Abstract: Activated biochar contains developed porosity and is rich in O-containing groups, both of which can allow the biochar to act as a catalyst in biomass catalytic pyrolysis and produce valuable chemicals. In this study, the role of porous structure and active O-containing groups of activated biochar catalyst during biomass pyrolysis at 600 °C was investigated in a fixed-bed reaction system. Activated biochar catalysts, obtained from bamboo-derived biochar activation at 800 °C with KOH, K2CO3, KHCO3, or CH3COOK, exhibited large surface area (SBET) and lots of O-containing groups. With the introduction of the activated biochar catalyst, the bio-oil yield reduced and the gaseous product yield increased, especially for CO, CO2, and CH4. The content of phenols (reaching 67%) and aromatics increased greatly, while content of O-containing compounds and acetic acid significantly reduced. Phenols content exhibited a positive linear correlation with the SBET of the catalyst, while aromatics content showed a negative linear correlation with the SBET. The SBET and active O-containing groups were both reduced after catalytic pyrolysis, especially in the –OH, O–CO, and C–O groups, which showed higher catalytic activity for biomass pyrolysis. Activated biochar catalyst acted both as a catalyst and reactant during catalytic pyrolysis process.

Keywords: Biomass; Catalytic pyrolysis; Activated biochar catalyst; Porous structure; Active O-Containing groups (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544220317540
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:210:y:2020:i:c:s0360544220317540

DOI: 10.1016/j.energy.2020.118646

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().