Adsorption of formaldehyde by biochar prepared by thermal plasma

Yuqing Zhang; Xianqin Lu; Qi Xin; Wei Liu; Tao Xia

doi:10.1117/12.2686963

6 August 2023 Adsorption of formaldehyde by biochar prepared by thermal plasma

Yuqing Zhang, Xianqin Lu, Qi Xin, Wei Liu, Tao Xia

Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 127813E (2023) https://doi.org/10.1117/12.2686963
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China

Abstract

Wheat straw was treated by thermal plasma technology to prepare biochar. In this study, the effects of different preparation methods (thermal plasma and traditional pyrolysis) and plasma treatment time (3, 4, 5 and 10min) on the characterization of biochar and its adsorption of formaldehyde were studied. Results showed that for plasma treatment method, the treatment time played a leading role in the physicochemical and surface properties of biochar. When the plasma treatment time was 5 min and 10 min, biochar had a relatively high number of functional groups. The specific surface area of biochar treated by plasma for 4 min was increased to 256.17 m²/g. As well as, compared with the traditional pyrolysis method, the biochar prepared by thermal plasma got significantly improved adsorption capacity for formaldehyde, in which the concentration of formaldehyde decreased from 1.654 mg/L to 0.854 mg/L, 0.592 mg/L, 0.555 mg/L and 0.534 mg/L for biochar prepared by thermal plasma with 3 min, 4 min, 5 min and 10 min respectively. This study suggested that compared with pyrolysis method, the plasma treatment was an efficiency method to produce biochar from wheat straw in short time and the plasma treated biochar got high potential as the adsorbent to remove formaldehyde.

Citation Download Citation

Yuqing Zhang, Xianqin Lu, Qi Xin, Wei Liu, and Tao Xia "Adsorption of formaldehyde by biochar prepared by thermal plasma", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 127813E (6 August 2023); https://doi.org/10.1117/12.2686963

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