期刊
BIORESOURCE TECHNOLOGY
卷 354, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127137
关键词
Banana pseudo-stem; High-pressure CO 2-hydrothermal; KOH activation; Activated carbon; Methylene blue adsorption
资金
- Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06N532]
- Shenzhen Supporting Fund [KYTDPT20181011104002]
- Shenzhen Engineering Research Center for Coal Comprehensive Utilization [XMHT20190203001]
- Shenzhen High-Level Professional Program [20160802681 J]
- Shenzhen RD Fund [KQTD20180411143418361]
- Special Funds for the Cultivation of Guangdong College StudentsScientific and Technological Innovation (Climbing Program Special Funds)
- Rigel Agricultural Ecological Industrial China (Shenzhen) , Co. LTD
- Beijing Thermal Power Group Co. LTD
The research shows that the high-pressure CO2-hydrothermal pre-treatment can increase the yield and methylene blue adsorption capacity of banana pseudo-stem activated carbon, with better results than direct KOH activation.
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 highpressure 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%.
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