High-pressure carbon dioxide-hydrothermal enhance yield and methylene blue adsorption performance of banana pseudo-stem activated carbon

Fenghao Jiang; Daofan Cao; Shunxuan Hu; Yue Wang; Yan Zhang; Xiaohe Huang; Hang Zhao; Changning Wu; Junguo Li; Yulong Ding; Ke Liu

doi:10.1016/j.biortech.2022.127137

High-pressure carbon dioxide-hydrothermal enhance yield and methylene blue adsorption performance of banana pseudo-stem activated carbon

Bioresour Technol. 2022 Jun:354:127137. doi: 10.1016/j.biortech.2022.127137. Epub 2022 Apr 9.

Authors

Fenghao Jiang¹, Daofan Cao², Shunxuan Hu¹, Yue Wang³, Yan Zhang¹, Xiaohe Huang⁴, Hang Zhao¹, Changning Wu⁵, Junguo Li⁶, Yulong Ding², Ke Liu⁷

Affiliations

¹ Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.
² Birmingham Centre for Energy Storage(BCES) & School of Chemical Engineering, University of Birmingham, United Kingdom B15 2TT, UK.
³ School of Innovation and Entrepreneurship, Southern University of Science and Technology, Shenzhen 518055, China.
⁴ Department of Thermal Engineering, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
⁵ School of Innovation and Entrepreneurship, Southern University of Science and Technology, Shenzhen 518055, China; Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China.
⁶ School of Innovation and Entrepreneurship, Southern University of Science and Technology, Shenzhen 518055, China; Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China. Electronic address: lijg@sustech.edu.cn.
⁷ Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China; School of Innovation and Entrepreneurship, Southern University of Science and Technology, Shenzhen 518055, China; Clean Energy Institute, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China.

PMID: 35405217
DOI: 10.1016/j.biortech.2022.127137

Abstract

In order to reduce environmental risks and fungus disease spread of banana waste, the high-pressure CO₂-hydrothermal treatment was developed to produce hydrochar as a precursor of activated carbon from banana pseudo-stem(BP). SEM, BET, XRD, Raman and FTIR was used to investigate the influence mechanism of the high-pressure CO₂-hydrothermal pretreatment on the yield and methylene blue(MB) adsorption capacities of the activated carbon. The results show that although the adsorption capacities of BP after high-pressure CO₂-hydrothermal pretreatment(BPx) is decrease due to decrease of oxygen-containing functional group and flatter spatial structure, that of BPx after KOH activation(BPx-A) significantly increase and is higher than that of BP by direct KOH activation(BP-A). Because BP-A presents honeycomb porous microstructures and has a higher mesoporous structure(138-472 m²/g), plentiful active sites and rich the abundant influential adsorption group of MB adsorption. In addition, compared to BP-A(0.68%), the total yield of BPx-A(2.42-9.11%) is 356-1340%.

Keywords: Activated carbon; Banana pseudo-stem; High-pressure CO(2)-hydrothermal; KOH activation; Methylene blue adsorption.

MeSH terms

Adsorption
Carbon Dioxide
Charcoal / chemistry
Kinetics
Methylene Blue / chemistry
Musa*
Water Pollutants, Chemical* / chemistry

Substances

Water Pollutants, Chemical
Carbon Dioxide
Charcoal
Methylene Blue