氧化热解增强生物固体衍生生物炭的二氧化碳吸附能力

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2024-09-30 DOI:10.1016/j.biombioe.2024.107407

D. Kim, S.A. Hadigheh

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引用次数: 0

摘要

本研究对热解和氧化热解产生的生物固体衍生生物炭进行了吸附动力学分析。吸附动力学分析在三种不同温度下进行。应用吸附动力学模型和扩散机制模型评估了吸附和扩散机制的特征。伪一阶模型（PFO）和伪二阶模型（PSO）显示，生物固体的二氧化碳吸附过程可归类为物理吸附，活化能低于 40 kJ/mol。温度分别为 700 ℃、800 ℃ 和 900 ℃ 的生物炭在 45 ℃ 时的二氧化碳吸附容量分别为 6.3、7.9 和 6.4 mg/g。相比之下，氧化热解产生的生物炭在 45 °C 时的二氧化碳吸附容量为 7.5 毫克/克。膜扩散和颗粒内扩散是吸附过程的主要限制因素。经过五次循环测试后，生物炭样品的吸附能力保持在 84-85 %。本研究证明了不同热解条件下产生的生物固体衍生生物炭的二氧化碳吸附能力，为使用固体吸附剂吸附二氧化碳提供了一种节能、可持续的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Oxidative pyrolysis for enhanced-CO2 adsorption capacity in biosolid-derived biochar

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Oxidative pyrolysis for enhanced-CO2 adsorption capacity in biosolid-derived biochar

The study conducts the adsorption kinetic analysis of biosolid-derived biochar produced from pyrolysis and oxidative pyrolysis. The adsorption kinetic analysis is performed at three different temperatures. The characteristics of the adsorption and diffusion mechanisms are evaluated by applying adsorption kinetic models and diffusion mechanism models. The pseudo-first-order model (PFO) and the pseudo-second-order model (PSO) reveal that the CO₂ adsorption process of the biosolid can be categorised as physisorption with activation energy below 40 kJ/mol. The CO₂ adsorption capacities of the biochar produced at 700 °C, 800 °C, and 900 °C are 6.3, 7.9, and 6.4 mg/g at 45 °C, respectively. In contrast, the biochar produced from oxidative pyrolysis shows a CO₂ adsorption capacity of 7.5 mg/g at 45 °C. Film and intraparticle diffusions are primary rate-limiting factors of the adsorption process. The biochar samples maintain 84–85 % of their adsorption capacities after five cyclic tests. The present study demonstrates the CO₂ adsorption capacity of biosolid-derived biochar produced from different conditions of pyrolysis, providing an energy-efficient and sustainable solution to CO₂ adsorption with solid adsorbents.

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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.