Biochar Made from Wheat Straw: Preparation and Characterization
CHANG Xiliang
HU Xuefei
JIANG Yufeng
SUN Hang
MU Zhongfeng
Abstract：In this paper,a laboratory experiment on preparation of biochar from wheat straw was described in terms of the preparation method of limited oxygen pyrolysis under different temperatures and the characterization of biochar by means of thermo gravimetric (TG),elemental analysis,infrared spectrum (FTIR),specific surface area analysis and scanning electron microscopy (SEM).Analysis of TG-DTG and FTIR spectroscopy showed that the weight-loss rate of wheat straw rose to a maximum of 33.73％ when the pyrolytic temperature at 350 ℃,during which the chemical bond was breaking and fatty alkyl chains faded away,and the straw ash yield was 12％,ash content accounted for 64.78％;as the pyrolytic temperature went up the biochar turned into a kind of "carbon-rich particles",and its aromaticities (H/C ratio) and hydrophobicity (O/C ratio) were enhanced dramatically,while the polarity [(O +N)/C] decreased sharply.In addition,the SEM revealed the hole-wall of biochar got thinner gradually with the increasing of pyrolytic temperature;furthermore,the internal pore structure of biochar enlarged gradually,and then a large number of micropores within the biochar appeared.
Keywords：biocharpyrolysischaracterizationstraw
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 24-29 )