Amanda de Oliveira e Silva, Ivan Felipe Silva dos Santos, Hugo Perazzini
{"title":"巴西农业工业部门可再生能源生产的咖啡壳预处理过程的建模和仿真研究","authors":"Amanda de Oliveira e Silva, Ivan Felipe Silva dos Santos, Hugo Perazzini","doi":"10.1016/j.biombioe.2025.108405","DOIUrl":null,"url":null,"abstract":"<div><div>Brazil, the world's largest coffee producer and exporter, generates substantial quantities of coffee husks, the main residues from wet processing. Recent research has demonstrated their energy potential. However, the high moisture content, low density and irregular particle size require a pre-treatment for efficient thermochemical conversion. This study analyzes the economic viability of a pre-treatment and combustion plant of coffee husk briquettes for electricity generation. The pre-treatment design, cost estimates, and sensitivity analysis were conducted, focusing on the influence of drying operational variables. Energy studies showed that the Southeast region produced 85.5 % of Brazil's coffee husks in 2024, potentially generating 178 GWh yr<sup>−1</sup>. Nonetheless, most scenarios were economically unviable, presenting a negative Net Present Value (NPV) equal to −$7.92 million, mainly due to the high investment in combustion technology (63.7 % of the total), and high drying costs (56.8 % of operating costs). The lowest Levelized Cost of Electricity (LCOE) was $198 MWh<sup>−1</sup>, achieved at the highest drying air temperature in the optimistic scenario, though still above the base tariff ($67.3 MWh<sup>−1</sup>). The air temperature, followed by the bed height, were the drying variables with the greatest influence on the bioenergy plant's economy, while the air velocity proved to be inelastic. This paper highlights the importance of key design parameters in reducing total costs.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"204 ","pages":"Article 108405"},"PeriodicalIF":5.8000,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study on the modeling and simulation of the pre-treatment process of coffee husks for renewable energy production in the Brazilian agro-industrial sector\",\"authors\":\"Amanda de Oliveira e Silva, Ivan Felipe Silva dos Santos, Hugo Perazzini\",\"doi\":\"10.1016/j.biombioe.2025.108405\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Brazil, the world's largest coffee producer and exporter, generates substantial quantities of coffee husks, the main residues from wet processing. Recent research has demonstrated their energy potential. However, the high moisture content, low density and irregular particle size require a pre-treatment for efficient thermochemical conversion. This study analyzes the economic viability of a pre-treatment and combustion plant of coffee husk briquettes for electricity generation. The pre-treatment design, cost estimates, and sensitivity analysis were conducted, focusing on the influence of drying operational variables. Energy studies showed that the Southeast region produced 85.5 % of Brazil's coffee husks in 2024, potentially generating 178 GWh yr<sup>−1</sup>. Nonetheless, most scenarios were economically unviable, presenting a negative Net Present Value (NPV) equal to −$7.92 million, mainly due to the high investment in combustion technology (63.7 % of the total), and high drying costs (56.8 % of operating costs). The lowest Levelized Cost of Electricity (LCOE) was $198 MWh<sup>−1</sup>, achieved at the highest drying air temperature in the optimistic scenario, though still above the base tariff ($67.3 MWh<sup>−1</sup>). The air temperature, followed by the bed height, were the drying variables with the greatest influence on the bioenergy plant's economy, while the air velocity proved to be inelastic. This paper highlights the importance of key design parameters in reducing total costs.</div></div>\",\"PeriodicalId\":253,\"journal\":{\"name\":\"Biomass & Bioenergy\",\"volume\":\"204 \",\"pages\":\"Article 108405\"},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2025-09-22\",\"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/S0961953425008165\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRICULTURAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomass & Bioenergy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0961953425008165","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURAL ENGINEERING","Score":null,"Total":0}
Study on the modeling and simulation of the pre-treatment process of coffee husks for renewable energy production in the Brazilian agro-industrial sector
Brazil, the world's largest coffee producer and exporter, generates substantial quantities of coffee husks, the main residues from wet processing. Recent research has demonstrated their energy potential. However, the high moisture content, low density and irregular particle size require a pre-treatment for efficient thermochemical conversion. This study analyzes the economic viability of a pre-treatment and combustion plant of coffee husk briquettes for electricity generation. The pre-treatment design, cost estimates, and sensitivity analysis were conducted, focusing on the influence of drying operational variables. Energy studies showed that the Southeast region produced 85.5 % of Brazil's coffee husks in 2024, potentially generating 178 GWh yr−1. Nonetheless, most scenarios were economically unviable, presenting a negative Net Present Value (NPV) equal to −$7.92 million, mainly due to the high investment in combustion technology (63.7 % of the total), and high drying costs (56.8 % of operating costs). The lowest Levelized Cost of Electricity (LCOE) was $198 MWh−1, achieved at the highest drying air temperature in the optimistic scenario, though still above the base tariff ($67.3 MWh−1). The air temperature, followed by the bed height, were the drying variables with the greatest influence on the bioenergy plant's economy, while the air velocity proved to be inelastic. This paper highlights the importance of key design parameters in reducing total costs.
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.