Promoting mechanism of SO2 and NO adsorption on activated carbon at sub-zero temperature

被引：0

作者：

Zhang, Zhichao ^{[1
]}

Liu, Yuan ^{[1
]}

Xiao, Yi ^{[1
]}

Wang, Jiawei ^{[1
]}

Wang, Tao ^{[1
]}

Zhang, Yongsheng ^{[1
]}

Xiao, Ping ^{[2
]}

Wang, Shiqing ^{[3
]}

Wang, Yutong ^{[2
]}

Min, Fanfei ^{[4
]}

Pan, Weiping ^{[1
]}

机构：

[1] North China Elect Power Univ, Key Lab Power Stn Energy Transfer Convers & Syst, Minist Educ, Beijing 102206, Peoples R China

[2] Huaneng Clean Energy Res Inst, Beijing 102209, Peoples R China

[3] Natl Key Lab High Efficiency Flexible Coal Power G, Beijing 102209, Peoples R China

[4] Anhui Univ Sci & Technol, Sch Mat Sci & Engn, Anhui 232001, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Low-temperature adsorption; Pore structure; Molecular dynamics simulations; POROUS CARBONS; SPECTROSCOPY;

D O I：

10.1016/j.jece.2024.114907

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption of SOS and NO on activated carbon (AC) was studied between -40 degrees C and 20 degrees C. The results showed that the adsorption capacity of AC-2-750 (AC reacted with a 2:1 ratio of KOH at 750 degrees C) for SO2 and NO were 374.2 mg/g and 83.1 mg/g at -40 degrees C, respectively. As the temperature decreased, the van der Waals and electrostatic forces strengthened while molecular movements weakened, favouring low-temperature adsorption. During co-adsorption, SO2 was preferentially adsorbed in ultramicropores, whereas NO was primarily adsorbed in supermicropores. When NO was oxidised to NO2, it occupied the original adsorption sites of SO2, leading to a reduction in SO2 adsorption. The presence of NO2 favoured the adsorption of the entire system. This study provided directions for the design of activated carbon for LAS (low-temperature adsorption) technology and illustrated its mechanism at the microscopic level.

引用

页数：15

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