EFFECTS OF ORTHOLOGS BIOCHAR ON BIOCHAR FROM CYANOBACTERIA PYROLYSIS CHARACTERISTICS AND GAS PRODUCTS

Song Weijun; Xie Yu; Chen Qianhao; Wang Yi'nan

doi:10.19912/j.0254-0096.tynxb.2022-0896

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (1) : 358-365. DOI: 10.19912/j.0254-0096.tynxb.2022-0896

EFFECTS OF ORTHOLOGS BIOCHAR ON BIOCHAR FROM CYANOBACTERIA PYROLYSIS CHARACTERISTICS AND GAS PRODUCTS

Song Weijun, Xie Yu, Chen Qianhao, Wang Yi'nan

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Abstract

This study focused on the effects of doping in cyanobacterial biochar on the pyrolysis characteristics and gas products released from the raw material, the mixed samples were investigated by TG-FTIR technique based on Microcystis aeruginosa （MA） as the raw material and the changes of the pyrolysis characteristics and gas products before and after the doping of Microcystis aeruginosa biochar （MAC）. The results showed that the main pyrolysis interval of the mixed samples widened from 322-434 ℃ to 242-422 ℃ and shifted, and the activation energy of the mixed samples showed different degrees of increase during the pyrolysis process, the infrared absorbance values of CH₄, CO₂, carbonyl compounds and other products varies in different degrees. With the increase of MAC preparation temperature, the burnout temperature of the mixture decreased, the maximum weight loss rate remained unchanged, and the activation energy increased from 22.77 kJ/mol to 42.17 kJ/mol. The release of aromatic aldehydes and CH₄ increases and the release of carbonyl compounds decreases when MAC is blended at 400 ℃,the CO₂ content shows a significant secondary increase at temperatures above 500 ℃. The aromatic aldehydes, furans, CH₄ and CO₂ decreased when MAC was blended at 600 ℃. As the doping ratio of MAC increased, the burnout temperature of the mixed samples increased, the maximum weight loss rate decreased, and the activation energy increased from 22.77 kJ/mol to 36.93 kJ/mol. The CO₂ release from the pyrolysis gas decreased when the doping ratio was 75%, and the amount of carbonyl compounds, acids and furans produced decreased when the doping ratio was 25%.

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pyrolysis / biochar / microalgae / TG-FTIR

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Song Weijun, Xie Yu, Chen Qianhao, Wang Yi'nan. EFFECTS OF ORTHOLOGS BIOCHAR ON BIOCHAR FROM CYANOBACTERIA PYROLYSIS CHARACTERISTICS AND GAS PRODUCTS[J]. Acta Energiae Solaris Sinica. 2024, 45(1): 358-365 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0896

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