Study on Coconut Shell Activated Carbon Temperature Swing Adsorption of Benzene and Formaldehyde

Yang, Zhiguang; Yan, Gaojun; Liu, Xueping; Feng, Chuanping; Zhu, Xiufang; Mao, Yanli; Chen, Songtao; Yu, Zhong‐Zhen; Fan, Ruimei; Shan, Linlin

doi:10.32604/jrm.2022.022031

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…36 Molten carbonates can provide excellent heat transfer during biomass pyrolysis because of the fluidic heat storage ability. 27 The results in this paper can provide new insights for both preparing high-performance carbon materials for supercapacitors and the disposal of hazardous slags. Hopefully, the proposed strategy can be extended from coconut shell and zinc-smelting slag to other kinds of biomass and waste slags.…”

Section: Introductionmentioning

confidence: 90%

“…[19][20][21][22] Coconut shell is a promising carbon source for biomass-derived carbon due to its availability, high carbon content, excellent adsorption ability and environmental safety. [23][24][25][26][27] Compared with traditional unsustainable carbon resources, the biomass-derived carbon materials by pyrolysis promise the following appealing advantages: (1) being a sustainable resource. Biomass is the product of photosynthesis, thus being sustainable and environmentally friendly; 7 (2) easy realization of heteroatom doping.…”

Section: Introductionmentioning

confidence: 99%

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Activating biomass carbon with metallurgical slag by pyrolysis in molten salt for high-performance supercapacitors

Lv¹,

Li²,

Shi³

et al. 2023

RSC Adv.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Activating biomass carbon with metallurgical slag by pyrolysis in molten salt for high-performance supercapacitors

Lv¹,

Li²,

Shi³

et al. 2023

RSC Adv.

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show abstract

“…Biomass-derived carbon is a versatile carbon-based material that is applied across various fields, including catalysts, adsorbents and electrodes [19][20][21][22]. Among biomass sources, coconut shells stand out due to their abundant availability, high carbon content, excellent adsorption capabilities and environmental friendliness [23][24][25][26][27]. The conversion of biomass into carbon materials involves carbonization or pyrolysis, where the organic precursors undergo thermal decomposition under controlled conditions.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Synthesis of Porous Biomass-Derived Carbon from Tecoma capensis for High Performance Supercapacitors: Characterization and Electrochemical Evaluation

Tharani,

Prithiba

2024

ajc

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Biowaste carbon products possess interesting physico-chemical properties and are cost-effective due to their remarkable characteristics. Biomass carbon derived from Tecoma capensis (TCL) was processed using pyrolysis at a controlled temperature in an eco-friendly, innovative and sustainable way to develop biomass-derived carbon material. The aim of this study is to demonstrate the facile synthesis of porous carbon compounds from biowaste and evaluate their use in supercapacitors. Various analytical methods, such as structural analysis, morphological studies and electrochemical studies, have been employed to characterize the carbon material generated from biomass. Electrochemical performance evaluation was conducted through cyclic voltammetry and galvanostatic charge-discharge studies utilizing 1 M H2SO4 and 1 M KOH aqueous electrolyte, which exhibited a specific capacitance of 238 F g-1. The outcomes of the studies suggested that the eco-friendly, straightforward process can be utilized to prepare biomass carbon for the electrochemical energy storage applications in an efficient and sustainable manner.

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“…The effects of pore structure and surface chemical properties of AC on the adsorption of benzene (gas) were studied. It was found that the larger the proportion of pore size <0.7 nm, the better the adsorption effect of AC on benzene, and when there were oxygen-containing groups on the surface of AC, the adsorption performance would be better (Zhang et al, 2020;Yang et al, 2022). The presence of hydroxyl groups can increase the adsorption capacity of AC for VOCs.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization and kinetic analysis of HNO3 coupled with microwave rapidly modified coconut shell activated carbon for VOCs adsorption

et al. 2023

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As a typical carbon-based material, activated carbon (AC) has satisfied adsorption performance and is of great significance in the field of volatile organic compounds (VOCs) pollutants removal. In order to further reveal the optimization mechanism of AC adsorption performance, coconut shell-based AC was selected as the research object, and different concentrations of HNO3 coupled with microwave were used for rapid modification and activation. The characteristic changes of pore structure and surface chemical of AC before and after rapid modification were analyzed, and the performance changes of VOCs absorption were discussed from the perspective of reaction kinetics. The pore structure and surface chemical properties of before and after modification were analyzed by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmeta-Teller (BET) analysis, Fourier Transform Infrared Spectroscopy (FTIR), and Boehm titration. The results showed that HNO3 coupled with microwave could significantly eliminate impurities in the pores of AC. After impregnation in HNO3 at a concentration of 1.5 mol L−1 and under microwave irradiation of 900 W, the number of micropore on the surface of samples increased slightly. When the impregnation concentration of HNO3 continued to increase, the two adjacent pore structures of the samples merged, which lead to a large decrease in the number of micropore and a corresponding increase in the proportion of mesoporous. Meanwhile, the specific surface area SBET of the modified NAC-6 sample increased to 1,140.40 m2 g−1, and the total acidic oxygen-containing functional groups on the surface increased by 0.459 mmol g−1 compared to that of the unmodified raw carbon. Furthermore, by analyzing the experimental results of formaldehyde adsorption on AC samples, it was concluded that the saturated adsorption capacity of the modified NAC-6 sample was 43% higher than that of the raw carbon. This study provides a more convenient and faster modification method for AC in the field of gas phase pollutants purification, which is helpful to realize the practical engineering application of AC with high efficiency, energy saving and sustainable.

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Study on Coconut Shell Activated Carbon Temperature Swing Adsorption of Benzene and Formaldehyde

Cited by 4 publications

References 38 publications

Activating biomass carbon with metallurgical slag by pyrolysis in molten salt for high-performance supercapacitors

Activating biomass carbon with metallurgical slag by pyrolysis in molten salt for high-performance supercapacitors

Sustainable Synthesis of Porous Biomass-Derived Carbon from Tecoma capensis for High Performance Supercapacitors: Characterization and Electrochemical Evaluation

Performance optimization and kinetic analysis of HNO3 coupled with microwave rapidly modified coconut shell activated carbon for VOCs adsorption

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