{"title":"Characterization of biomass comminution for entrained-flow gasification","authors":"Haifeng Lu, Yao Bian, Xiaolei Guo, Haifeng Liu","doi":"10.1016/j.biombioe.2024.107478","DOIUrl":null,"url":null,"abstract":"<div><div>Biomass entrained-flow gasification is one of the most promising conversion technologies for biomass utilization, characterized by high conversion efficiency and environmental friendliness. As a booming technology, the selection of particle size in biomass entrained-flow gasification has been a key issue of concern but has not yet been resolved. In this paper, a hammer mill was used to comminute biomass into powders of various particle sizes; Typical biomass materials including rice husk, rice straw, wood chip, and chinar leaf were selected as experimental materials to analyze the comminuting characteristics of different biomasses. Different screen sizes (SS) ranging from 0.2 mm to 2 mm were utilized to investigate the influence of comminuting particle size. The influence of SS on the characteristics of biomass particles (particle size, particle shape) was analyzed. The characteristic particle size, represented by <em>d</em><sub>90</sub>, was extracted and found to exhibit a good linear relationship with the SS. It was confirmed that reducing the particle size effectively reduces the particle anisotropy. Furthermore, the bulking and flow characteristics of different particles was investigated. Despite the increase in bulk and tap densities with decreasing particle size, it is interesting to note that the flowability of the powder first improves and then weakens. Finally, the impact of SS on the comminution energy consumption was investigated and the Bond comminution constants were fitted for the four biomass tested.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"191 ","pages":"Article 107478"},"PeriodicalIF":5.8000,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomass & Bioenergy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0961953424004318","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURAL ENGINEERING","Score":null,"Total":0}
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Abstract
Biomass entrained-flow gasification is one of the most promising conversion technologies for biomass utilization, characterized by high conversion efficiency and environmental friendliness. As a booming technology, the selection of particle size in biomass entrained-flow gasification has been a key issue of concern but has not yet been resolved. In this paper, a hammer mill was used to comminute biomass into powders of various particle sizes; Typical biomass materials including rice husk, rice straw, wood chip, and chinar leaf were selected as experimental materials to analyze the comminuting characteristics of different biomasses. Different screen sizes (SS) ranging from 0.2 mm to 2 mm were utilized to investigate the influence of comminuting particle size. The influence of SS on the characteristics of biomass particles (particle size, particle shape) was analyzed. The characteristic particle size, represented by d90, was extracted and found to exhibit a good linear relationship with the SS. It was confirmed that reducing the particle size effectively reduces the particle anisotropy. Furthermore, the bulking and flow characteristics of different particles was investigated. Despite the increase in bulk and tap densities with decreasing particle size, it is interesting to note that the flowability of the powder first improves and then weakens. Finally, the impact of SS on the comminution energy consumption was investigated and the Bond comminution constants were fitted for the four biomass tested.
生物质内流气化是生物质利用领域最有前途的转化技术之一，具有转化效率高和环境友好的特点。作为一项蓬勃发展的技术，生物质内流气化中粒度的选择一直是人们关注的关键问题，但至今尚未得到解决。本文使用锤式粉碎机将生物质粉碎成不同粒度的粉末；选取典型的生物质材料，包括稻壳、稻草、木屑和千层叶作为实验材料，分析不同生物质的粉碎特性。利用 0.2 毫米至 2 毫米的不同筛分尺寸（SS）来研究粉碎粒度的影响。分析了 SS 对生物质颗粒特性（粒度、粒形）的影响。提取了以 d90 为代表的特征粒度，发现其与 SS 呈良好的线性关系。研究证实，减小粒径可有效降低颗粒的各向异性。此外，还研究了不同颗粒的体积和流动特性。尽管随着颗粒尺寸的减小，体积密度和敲击密度都会增加，但值得注意的是，粉末的流动性先改善后减弱。最后，研究了 SS 对粉碎能耗的影响，并拟合了四种测试生物质的邦德粉碎常数。
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.
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