Insights into thermokinetic study of plasma treated rice straw using thermogravimetric analysis

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2025-05-05 DOI:10.1016/j.biombioe.2025.107944

Abhishek Kumar , Sandip Gangil , Vinod Kumar Bhargav , Parmanand Sahu

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引用次数: 0

Abstract

This study provides the first in-depth investigation of the effects of cold plasma treatment on rice straw, utilizing TGA curves, Gaussian deconvolution (Hemicellulose, Cellulose, and Lignin), Kinetics and Thermodynamics (Activation energy, Pre-exponential factor, Gibbs free energy, Enthalpy, Potential barrier gap, and Entropy) through model-free iso-conversional methods (FWO and KAS), Master plot analysis for reaction mechanism determination (Criado method), Adsorption parameters (BET isotherm, Surface area, Pore volume, Methylene Blue value, Iodine number), HR FESEM imaging, and FTIR analysis. DTG analysis revealed reduced hemicellulose and increased lignin content after plasma treatment. The highest values for Ea, A, ΔH and ΔS occurred at α = 0.6, while ΔG showed the lowest value at α = 0.6 for both, untreated rice straw (RS) and plasma treated rice straw (PRS) samples. PRS exhibited lower ΔG values at all conversion levels as compared to RS. BET results confirmed increased surface area and pore volume, with a dramatic rise in iodine number, indicating enhanced micro porosity due to plasma treatment. FESEM imaging showed well-formed pores on PRS surfaces, while FTIR revealed reduced peak intensities and functional groups such as hydroxyl, amino, and carbonyl groups were present. This study highlights cold plasma treatment as a promising technology for effective rice straw treatment and provides valuable insights for designing scalable reactors for manufacturing high quality adsorbents for various applications.

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用热重分析法研究等离子体处理稻草的热动力学

本研究利用TGA曲线、高斯反卷积（半纤维素、纤维素和木质素）、动力学和热力学（活化能、指数前因子、吉布斯自由能、焓、势垒间隙和熵），通过无模型等转换方法（FWO和KAS）、Master plot分析（Criado法）确定反应机理，首次深入研究了冷等离子体处理对水稻秸秆的影响。吸附参数（BET等温线，比表面积，孔隙体积，亚甲基蓝值，碘值），HR FESEM成像，FTIR分析。DTG分析显示血浆处理后半纤维素减少，木质素含量增加。在α = 0.6时，Ea、A、ΔH和ΔS的值最高，而在α = 0.6时，未处理稻秸秆（RS）和血浆处理稻秸秆（PRS）的值最低，均为ΔG。与RS相比，在所有转化水平下，PRS的ΔG值都更低。BET结果证实了比表面积和孔隙体积的增加，碘值急剧上升，表明等离子体处理增强了微孔隙度。FESEM成像显示PRS表面形成良好的孔隙，而FTIR显示峰值强度降低，并且存在羟基，氨基和羰基等官能团。本研究强调了冷等离子体处理是一种很有前途的稻秆有效处理技术，并为设计可扩展反应器以生产各种应用的高质量吸附剂提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.