Porous carbon materials derived from rice husk pyrolysis with NaCl/ Na2CO3 binary molten salt for CO2 capture

被引：0

作者：

Wang, Zhenjiang ^{[1
]}

Liu, Chao ^{[1
]}

Ouyang, Jia ^{[2
]}

Xue, Beichen ^{[1
,3
]}

Xu, Jiahuan ^{[1
,4
]}

Zhai, Jinpeng ^{[1
]}

Xiao, Rui ^{[1
]}

机构：

[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing 211189, Peoples R China

[2] Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210037, Peoples R China

[3] Hainan Univ, Sch Marine Sci & Engn, Haikou 570228, Peoples R China

[4] China Energy New Energy Technol Res Inst, Beijing 102209, Peoples R China

来源：

INDUSTRIAL CROPS AND PRODUCTS | 2025年 / 227卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Biomass; Rice husk; Molten salt pyrolysis; Porous carbon; CO2; capture; ACTIVATED CARBONS; BIOMASS; CARBONIZATION;

D O I：

10.1016/j.indcrop.2025.120808

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

CO2 capture from flue gas by biomass-based porous carbons is a green and sustainable approach to reduce carbon emissions. In this study, NaCl/Na2CO3 binary molten salt was employed to prepare porous carbons from rice husk for CO2 capture. Compared to direct pyrolysis, NaCl/Na2CO3 significantly reduced the ash content in rice husk derived porous carbons and etched the biochar matrix during pyrolysis, resulting in notable formation of micropores, mesopores, and macropores, along with the dominanted micropores around 0.65 nm. The molten salt was most pronounced at 800 degrees C, with MSPC-800 exhibiting the specific surface area of 922 m2/g and micropore volume of 0.318 cm3 /g. Meanwhile, MSPC-800 had a significant amount of surface basic oxygen-containing functional groups, mainly C-O-C/-OH and C--O. These characteristics endowed MSPC-800 with good CO2 adsorption capacity (4.84 mmol/g at 0 degrees C and 3.32 mmol/g at 25 degrees C), suitable isosteric heat of adsorption (22.4 kJ/mol), high CO2/N2 selectivity (33 at 0 degrees C and 19 at 25 degrees C), long breakthrough time (788 s at 25 degrees C), and excellent cycling stability (less than 1 % decay after 10 cycles). Overall, this work provided a reference for the preparation of porous carbons from high-ash-content biomass and the regulation of their CO2 adsorption properties.

引用

页数：9

共 41 条

[1] Bai J., Huang J., Yu Q., Demir M., Kilic M., Altay B.N., Hu X., Wang L., N-doped porous carbon derived from macadamia nut shell for CO2 adsorption, Fuel Process. Technol., 249, (2023)
[2] Chen Y., Zhang X., Chen W., Yang H., Chen H., The structure evolution of biochar from biomass pyrolysis and its correlation with gas pollutant adsorption performance, Bioresour. Technol., 246, pp. 101-109, (2017)
[3] Chen Z., Deng S., Wei H., Wang B., Huang J., Yu G., Activated carbons and amine-modified materials for carbon dioxide capture- a review, Front. Env. Sci. Eng., 7, pp. 326-340, (2013)
[4] Cheng Z., Liu X., Diao R., Qi F., Ma P., Structural regulation of ultra-microporous biomass-derived carbon materials induced by molten salt synergistic activation and its application in CO2 capture, Chem. Eng. J., 486, (2024)
[5] Dong L., Liu Y., Wen H., Zou C., Dai Q., Zhang H., Xu L., Hu H., Yao H., The deoxygenation mechanism of biomass thermal conversion with molten salts: experimental and theoretical analysis, Renew. Energy, 219, (2023)
[6] Du J., Chu X., Ren F., Zheng S., Shao Z., Study on CO2 adsorption performance of biocarbon synthesized in situ from nitrogen-rich biomass pomelo peel, Fuel, 352, (2023)
[7] Gao J., Wang Z., Li B., Zhao W., Ba Z., Liu Z., Huang J., Fang Y., Effect of hydrothermal pH values on the morphology of special microspheres of lignin-based porous carbon and the mechanism of carbon dioxide adsorption, Bioresour. Technol., 393, (2024)
[8] Gomez-Delgado E., Nunell G.V., Cukierman A.L., Bonelli P.R., Influence of the carbonization atmosphere on the development of highly microporous adsorbents tailored to CO2 capture, J. Energy Inst., 102, pp. 184-189, (2022)
[9] Guo Y., Tan C., Sun J., Li W., Zhang J., Zhao C., Porous activated carbons derived from waste sugarcane bagasse for CO2 adsorption, Chem. Eng. J., 381, (2020)
[10] Ha S., Jeong S.G., Myeong S., Lim C., Lee Y., High-performance CO2 adsorption of jellyfish-based activated carbon with many micropores and various heteroatoms, Util., 76, (2023)

← 1 2 3 4 5 →