Remarkable adsorption performance of MOF-199 derived porous carbons for benzene vapor

Chenpeng Wang; Hang Yin; Pengjie Tian; Xuejiao Sun; Xiaoyang Pan; Kongfa Chen; Wen-Jie Chen; Qi-Hui Wu; Shuiyuan Luo

doi:10.1016/j.envres.2020.109323

Remarkable adsorption performance of MOF-199 derived porous carbons for benzene vapor

Environ Res. 2020 May:184:109323. doi: 10.1016/j.envres.2020.109323. Epub 2020 Feb 29.

Authors

Chenpeng Wang¹, Hang Yin², Pengjie Tian², Xuejiao Sun³, Xiaoyang Pan², Kongfa Chen⁴, Wen-Jie Chen⁵, Qi-Hui Wu⁶, Shuiyuan Luo²

Affiliations

¹ School of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, 362000, China; College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
² School of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, 362000, China.
³ School of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, 362000, China. Electronic address: sun061302125@163.com.
⁴ College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
⁵ School of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, 362000, China. Electronic address: chenwenjie@qztc.edu.cn.
⁶ School of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, 362000, China; College of Mechanical and Energy Engineering, Jimei University, Xiamen, 361021, China.

PMID: 32145552
DOI: 10.1016/j.envres.2020.109323

Abstract

Volatile organic compounds (VOCs) are perceived as serious pollutants due to their great threat to both environment and human health. Recovery and removal of VOCs is of great significance. Herein, novel MOF-199 derived porous carbon materials (MC-T-n) were prepared by using MOF-199 as precursor, glucose as additional carbon source and KOH as activator, and then characterized. Adsorption performance of MC-T-n materials for benzene vapor was investigated. Isotherms of MC-T-n samples towards benzene and water vapor were measured. The adsorption selectivities of benzene/water were estimated by DIH (difference of the isosteric heats) equation. Results indicated that BET surface area and pore volume of MC-T-n materials reached separately 2320 m²/g and 1.05 m³/g. Benzene adsorption capacity of MC-T-n materials reached as high as 12.8 mmol/g at 25 °C, outperforming MOF-199 and some conventional adsorbents. Moreover, MC-T-n materials presented type-V isotherms of water vapor, suggesting their excellent water resistance. The isosteric heats of benzene adsorption on MC-500-6 were much greater than that of water adsorption, leading to a preferential adsorption for C₆H₆ over H₂O. The adsorption selectivity of C₆H₆/H₂O on MC-500-6 reached up to 16.3 superior to some previously reported MOFs. Therefore, MC-500-6 was a promising candidate for VOC adsorption and seperation. This study provides a strong foundation for MOF derived porous carbons as adsorbents for VOC removal.

Keywords: Adsorption; Benzene; MOF-199; Porous carbon; VOC.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Air Pollution* / prevention & control
Benzene* / chemistry
Carbon*
Gases
Porosity

Substances

Gases
Carbon
Benzene