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在巴西甘乙醇行业,对多种生物能源配置与碳捕获和储存系统的优化和权衡分析
Bruno Bunya1, César A R Sotomonte1,2, Alisson Aparecido Vitoriano Julio1,3
1Mechanical Engineering Institute-IEM, Federal University of Itajubá-UNIFEI, Itajubá 37500-903, Brazil.
Entropy (Basel, Switzerland)
|August 29, 2024
概括
生物能源与碳捕获和储存 (BECCS) 对于排放目标至关重要. 这项研究优化了巴西工厂的BECCS,发现了能效和二氧化碳捕获率之间的权衡,以减少温室气体排放.
科学领域:
- 能源工程 能源工程
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 生物能源与碳捕获和储存 (BECCS) 对于实现"巴黎协定"中的全球减排目标至关重要.
- 热电联产厂是二氧化碳排放的重要来源,需要有效的碳捕获解决方案.
研究的目的:
- 为巴西一座热电联产厂进行BECCS技术的热力学优化和分析.
- 为了最大限度地提高净电能发电 (MWe) 和二氧化碳 (CO2) 捕获 (Mt/年),同时评估具体的二氧化碳排放量 (gCO2/kWh).
主要方法:
- 评估六个联合发电系统与使用单乙醇胺 (MEA) 的化学吸收过程相集成.
- 热力学分析和优化,以确定平衡能源输出和二氧化碳捕获的最佳解决方案.
主要成果:
- 单一再生器配置 (REG1) 实现了更高的二氧化碳捕获 (51.9%),但电站效率降低了14.9%.
- 使用三个再生器 (Reheat3) 的重新加热配置显示了更低的效率罚款 (7.41%),但捕获的二氧化碳 (36.3%) 较少.
- 捕获率高于51.9%可能会导致比没有碳捕获的工厂更高的特定排放.
结论:
- 巴西热电厂的最佳BECCS配置需要在二氧化碳捕获率和能源效率之间进行权衡.
- 在CCS系统中,捕获率低于51%可确保在以甘为基础的发电和乙醇生产中净减少温室气体排放.
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