秸秆与果皮生物炭吸附CO2性能和机理研究
Research on the Adsorption Capacity and Mechanism of CO2 from Straw and Peel Biochar
DOI: 10.12677/ojns.2024.122050, PDF,   
作者: 尤倩倩, 郑轶男, 汪 涛, 戴欢涛, 曹澄澄*：徐州工程学院 环境工程学院，江苏 徐州
关键词: CO2捕集；生物炭；吸附；温室气体；CO2 Capture； Biochar； Adsorption； Greenhouse Gas
摘要: 在全球气候变暖的大背景下，如何缓解温室效应是一个全球性的问题和挑战。本文制备了柚子皮、玉米秸秆以及芝麻秸秆生物炭，研究了果皮与秸秆生物炭吸附CO2的性能和机理。结果表明，秸秆生物炭的孔隙结构优于果皮生物炭，其比表面积是果皮生物炭的1.48~2.32倍。生物炭对CO2的吸附以微孔为主，生物炭的孔隙与其元素组成密切相关，高的碳含量有利于孔隙发育，增大比表面积，而多的无机灰分则会堵塞孔隙，导致比表面积减小。吸附动力学和等温线研究表明，玉米秸秆生物炭对CO2的吸附主要为单层吸附，吸附以物理吸附为主并伴有化学吸附，升高温度则会降低生物炭对CO2的吸附量。
Abstract: Under the background of global warming, how to alleviate the greenhouse effect is a global problem and challenge. In this study, a series of biochar derived from pomelo peel, corn stalk and sesame stalk were prepared, and the CO2 adsorption properties and mechanism on the peel and straw based biochar were studied. The results showed that the pore structure of straw-based biochar was better than that of peel-based biochar, and the specific surface area of former was 1.48~2.32 times larger than that of peel biochar. The pore development of biochar is closely related to its elemental composition. High carbon content is conducive to pore development and increase the specific surface area, while inorganic ash will block the pores, resulting in a decrease in the specific surface area. Adsorption kinetics and isotherm studies showed that the CO2 adsorption of corn straw biochar was mainly single-layer adsorption, and the adsorption process was mainly physical adsorption accompanied by slightly chemical adsorption. Increasing temperature would reduce the CO2 adsorption capacity of biochar.
文章引用：尤倩倩, 郑轶男, 汪涛, 戴欢涛, 曹澄澄. 秸秆与果皮生物炭吸附CO2性能和机理研究[J]. 自然科学, 2024, 12(2): 432-439. https://doi.org/10.12677/ojns.2024.122050

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