Pyrolysis/gasification of pine sawdust biomass briquettes under carbon dioxide atmosphere: Study on carbon dioxide reduction (utilization) and biochar briquettes physicochemical properties

Zewei Liu; Fengxia Zhang; Huili Liu; Fei Ba; Sijia Yan; Jianhang Hu

doi:10.1016/j.biortech.2017.11.012

Pyrolysis/gasification of pine sawdust biomass briquettes under carbon dioxide atmosphere: Study on carbon dioxide reduction (utilization) and biochar briquettes physicochemical properties

Bioresour Technol. 2018 Feb:249:983-991. doi: 10.1016/j.biortech.2017.11.012. Epub 2017 Nov 6.

Authors

Zewei Liu¹, Fengxia Zhang², Huili Liu³, Fei Ba¹, Sijia Yan¹, Jianhang Hu⁴

Affiliations

¹ State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China.
² State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; Kunming Metallurgy College, Kunming 650093, Yunnan Province, PR China.
³ State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China.
⁴ State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China; Engineering Research of Metallurgy Energy Conservation & Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan Province, PR China. Electronic address: hujh51@kmust.edu.cn.

PMID: 29145126
DOI: 10.1016/j.biortech.2017.11.012

Abstract

In this paper, the effects of temperature and CO₂ content on CO₂ reduction (utilization) efficiency and physicochemical properties of pyrolysis/gasification biochar briquettes were investigated. The CO₂ reduction (utilization) efficiency (CRE) reached the peak value of 74.9% in a 10% CO₂/90% N₂ atmosphere at 600 °C. The crackings of hydroxyl, CC bonds, methyl and methylene groups of biochars briquette were enhanced by high temperature and CO₂. The increase of CO₂ concentration was beneficial for developing biochar microporosity, but not conductive to enhance higher heating value, volume density and durability of biochar briquette. To get a higher CRE and make feasible biochar briquettes are the primary goal for this work. Therefore, the optimal introduced CO₂ to biomass ratio is calculated to be 135 g/kg for experiments done with 10% CO₂ with N₂ at 600 °C.

Keywords: Biochar briquettes; CO(2) reduction and utilization; Physicochemical properties; Pyrolysis/gasification.

MeSH terms

Biomass
Carbon Dioxide
Charcoal*
Temperature
Wood*

Substances

biochar
Carbon Dioxide
Charcoal