酸碱催化对果木枝水热炭组成及结构影响

刘耀鑫; 汪远; 潘一辉; 伯灵; 文博

doi:10.19912/j.0254-0096.tynxb.2023-1586

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (2) : 18-24. DOI: 10.19912/j.0254-0096.tynxb.2023-1586

酸碱催化对果木枝水热炭组成及结构影响

刘耀鑫¹, 汪远², 潘一辉², 伯灵³, 文博¹

作者信息 +

EFFECT OF ACID-BASE CATALYSIS ON HYDROTHERMAL CARBON COMPOSITION AND STRUCTURE OF FRUITWOOD BRANCHES

Liu Yaoxin¹, Wang Yuan², Pan Yihui², Bo Ling³, Wen Bo¹

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文章历史 +

摘要

以果木枝为原料,柠檬酸和KOH为催化剂,利用水热碳化技术制备果木枝水热炭,考察酸碱催化对果木枝水热炭的组成及结构影响。结果表明：水热碳化能提高生物质的燃料品质,柠檬酸的加入能加深水热炭的炭化程度,提高水热炭的热值（由18.06 MJ/kg提高至22.23 MJ/kg）,而KOH的加入可增大灰分含量,降低水热炭热值;水热炭介孔结构居多且表面有许多炭微粒生成,柠檬酸的加入能促进炭微粒的形成,而KOH作用相反;反应温度升高和催化剂的添加均能增加水热炭的比表面积,从3.63 m²/g增加到496.37~582.40 m²/g;低浓度的柠檬酸和KOH会促进微孔的形成;高温和高浓度的柠檬酸和KOH均能促进水热炭的芳构化;柠檬酸的加入能提高水热炭的石墨化程度,KOH的加入使水热炭的无定形程度加深。

Abstract

Hydrothermal carbon was prepared by hydrothermal carbonization using fruitwood branches as raw material and citric acid and KOH as catalysts to investigate the effect of acid and alkali catalysis on the composition and structure of fruitwood branches hydrothermal carbon. The results show that hydrothermal carbonization can improve the fuel quality of biomass, the addition of citric acid can increase the degree of carbonization and the calorific value of the hydrothermal carbon from 18.06 MJ/kg to 22.23 MJ/kg, while the addition of KOH increases the ash content and decreases the calorific value of the hydrothermal carbon; the hydrothermal carbon has a predominantly mesoporous structure and many char particles are formed on the surface. The addition of citric acid promotes the formation of carbon particles, while KOH has the opposite effect; the increase in reaction temperature and the addition of catalyst increases the specific surface area of the hydrothermal carbon from 3.63 m²/g to a range of 496.37-582.40 m²/g;the formation of micropore is promoted by low concentrations of citric acid and KOH; and the arylation of hydrothermal carbon can be promoted by both high temperature and high concentration of citric acid and KOH; the addition of citric acid is able to increase the degree of graphitization of the hydrothermal charcoal, and the addition of KOH deepens the degree of am

导出引用

刘耀鑫, 汪远, 潘一辉, 伯灵, 文博. 酸碱催化对果木枝水热炭组成及结构影响[J]. 太阳能学报. 2025, 46(2): 18-24 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1586

Liu Yaoxin, Wang Yuan, Pan Yihui, Bo Ling, Wen Bo. EFFECT OF ACID-BASE CATALYSIS ON HYDROTHERMAL CARBON COMPOSITION AND STRUCTURE OF FRUITWOOD BRANCHES[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 18-24 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1586

中图分类号： TK16

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