Comparative characterization of biochars produced at three selected pyrolysis temperatures from common woody and herbaceous waste streams

PeerJ

article

Matthew Askeland¹  Bradley Clarke²  Jorge Paz-Ferreiro¹ 

[1] School of Engineering, RMIT University;School of Science, RMIT University

关键词: Biochar;    Australia;    Pyrolysis;    Contaminants;    Characterization;    Waste;   

DOI  :  10.7717/peerj.6784

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Biochar, the product of biomass pyrolysis, has been explored as a soil amendment and carbon capture vessel. Recent literature has aligned biochar as a novel sorbent for a host of environmental contaminants. Through the variation of pyrolysis conditions, biochars can be engineered to have qualities desirable in sorbents whilst maintaining their agronomic benefits. This study focuses on identifying the effects that feedstock type and process temperature have on biochar characteristics which may in turn shed light on their potential environmental applications. Using this approach, six biochars were created from two waste biomasses. The biochars exhibited wide ranges of pH (5.6–11.1), surface area (16.2–397.4 m2/g), electrical conductivity (19–2,826 µS/cm), fixed carbon (72–97%), heavy metal and polycyclic aromatic hydrocarbons (PAHs). Statistically significant trends (P 500 °C) and ensuring the use of contaminant-free feedstocks. The variation in surface areas, carbonized fractions and surface functional groups achieved suggest that using the correct feedstock and process, biochar could be produced in Victoria (Australia) from common organic waste streams to the ends of acting as a sorbent, soil enhancer, and a waste management strategy.

【 授权许可】

CC BY