Comprehensive insights into the impact of straw types, temperature and atmosphere on pyrochar properties and its enhancement potential for anaerobic digestion

文献类型： 外文期刊

第一作者： Shen, Ruixia

作者： Shen, Ruixia;Liu, Jie;Yao, Zonglu;Feng, Jing;Yu, Jiadong;Luo, Juan;Zhao, Lixin

作者机构：

期刊名称：SUSTAINABLE ENERGY & FUELS （ 影响因子：4.1； 五年影响因子：5.1 ）

ISSN： 2398-4902

年卷期： 2025 年 9 卷 17 期

页码：

收录情况： SCI

摘要： Pyrochar has been extensively utilized; however, there is a dearth of research on the impact of pyrochar characteristics on the biogas production potential of anaerobic digestion (AD). To address this knowledge gap, in this study, 27 types of pyrochar were prepared through the pyrolysis of various agricultural straws (corn stover, cotton stalks, and rice straw) under different temperatures and atmospheres. Subsequently, the properties of these pyrochars and their potential to enhance AD were systematically investigated. The results revealed that these pyrochars mainly contained -OH groups, followed by aromatic rings. In particular, the corn stover-600-CO2 pyrochar had the highest specific surface area of 131 m2 g-1 and a pore volume of 0.147 cm3. Moreover, this pyrochar had an excellent electrical conductivity, with a low resistivity of 781 Omega cm, which was beneficial for electron transfer during AD. When the corn stover-450-N2 pyrochar was used to enhance AD, the highest CH4 production rate and CH4 content in biogas reached 69.5 mL g-1 VS/d and 67.1%, respectively. Correspondingly, the highest cumulative CH4 production reached 584 mL g-1 VS, which was 1.8 times higher than that of the control group. This study can offer a crucial foundation for the application of suitable pyrochar in AD.

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