EFFECT OF TEMPERATURE ON PHYSICOCHEMICAL PROPERTIES OF STRAW BIOCHAR：FOCUS ON SURFACE APPEARANCE AND ELECTROCHEMICAL PROPERTIES

Wang Jiong; Zhang Pin; Zhang Shuqing; Liu Shengyong; Lu Jie; Wen Ping

doi:10.19912/j.0254-0096.tynxb.2021-1268

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (5) : 399-404. DOI: 10.19912/j.0254-0096.tynxb.2021-1268

EFFECT OF TEMPERATURE ON PHYSICOCHEMICAL PROPERTIES OF STRAW BIOCHAR：FOCUS ON SURFACE APPEARANCE AND ELECTROCHEMICAL PROPERTIES

Wang Jiong¹, Zhang Pin², Zhang Shuqing², Liu Shengyong¹, Lu Jie¹, Wen Ping¹

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Abstract

The programmed heating and oxygen limiting method technique is used to prepare wheat straw biochar at different temperatures. The effect of carbonization temperature on surface morphology, functional groups and physicochemical properties with the increase of carbonization temperature are investigated. Then, electrode is designed based on biochar and its electrochemical performance is evaluated. The results show that the biochar retains the multilayer bundle structure of straw cellulose, which is layered and non-uniform slit pore. Straw biochar has excellent capacitance properties, and the electrochemical performance of WB600 ℃ biochar is the most prominent. It has been observed from FTIR results that when the carbonization temperature is ≥600 ℃,there are several weak scattered between 1430-1870 cm^-1. This is due to the thermal fusion of the crystal structure of lignin with the increase of carbonization temperature. The — CH== group in biochar is transformed into C==O group, resulting in ketones with ring structure is formed.

Key words

straw / biochar / physicochemical properties / pyrolysis temperature / electrochemistry

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Wang Jiong, Zhang Pin, Zhang Shuqing, Liu Shengyong, Lu Jie, Wen Ping. EFFECT OF TEMPERATURE ON PHYSICOCHEMICAL PROPERTIES OF STRAW BIOCHAR：FOCUS ON SURFACE APPEARANCE AND ELECTROCHEMICAL PROPERTIES[J]. Acta Energiae Solaris Sinica. 2022, 43(5): 399-404 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1268

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