Research on the mechanism of hydrogen production by catalytic fast co-pyrolysis of cotton stalks and polypropylene: An experimental and theoretical study

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2024-10-28 DOI:10.1016/j.biombioe.2024.107459

Lin Li , Langqi Shi , Zijun Zhang , Guang Sun , Zhaoying Li

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Abstract

The utilization of solid wastes such as biomass and plastics for energy production holds significant practical importance. This study conducts experimental research on microwave-assisted catalytic fast co-pyrolysis (co-CFP) of cotton stalks (CS) and polypropylene (PP) over alkali-modified HZSM-5 and Ni @ alkali-modified HZSM-5 for hydrogen production. The hydrogen production mechanism is carried out through experiments, reaction kinetics, and response surface method (RSM). The experimental results indicate that the optimal temperature for the co-CFP of CS and PP over 5%Ni-HT1.0 is 550 °C, and the hydrogen concentration is 37.9 vol%. The synergistic effect between CS and PP is explored by calculating comprehensive pyrolysis index. The activation energy is analyzed using the reaction kinetics Model-free integration methods (FWO and KAS), as well as model-fitting methods (CR). When the ratio of CS to PP is high (CS:PP = 1.0:0.5), the activation energy for the co-pyrolysis decreased. The addition of catalysts also has an important impact on the reduction of activation energy. By utilizing RSM to analyze the interactive effects on the generation of H₂. This study provides a new approach for the co-pyrolysis of biomass such and plastics for hydrogen production.

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棉秆和聚丙烯催化快速共热解制氢机理研究：实验和理论研究

利用生物质和塑料等固体废物生产能源具有重要的现实意义。本研究对微波辅助催化棉秆（CS）和聚丙烯（PP）在碱改性 HZSM-5 和 Ni @ 碱改性 HZSM-5 上快速共热解（co-CFP）制氢进行了实验研究。通过实验、反应动力学和响应面法（RSM）研究了制氢机理。实验结果表明，5%Ni-HT1.0 上 CS 和 PP 的共 CFP 最佳温度为 550 ℃，氢气浓度为 37.9 vol%。通过计算综合热解指数，探讨了 CS 和 PP 之间的协同效应。使用反应动力学无模型积分法（FWO 和 KAS）以及模型拟合法（CR）分析了活化能。当 CS 与 PP 的比例较高时（CS:PP = 1.0:0.5），共热解的活化能降低。催化剂的添加对活化能的降低也有重要影响。通过利用 RSM 分析 H2 生成过程中的交互影响，该研究提供了一种新的方法来研究 H2 的生成过程。这项研究为生物质和塑料共热解制氢提供了一种新方法。

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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.