Economic, energetic, and environmental analysis of lignocellulosic biorefineries with carbon capture
Economic, energetic, and environmental analysis of lignocellulosic biorefineries with carbon capture
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碳捕获木质纤维素生物精炼厂的经济、能源和环境分析
DOI：
10.1016/j.apenergy.2021.117539
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发表时间：
2021
期刊：
影响因子：
11.2
通讯作者：
C. Maravelias
中科院分区：
文献类型：
--
作者：
Caleb H. Geissler;C. Maravelias
生物能源与碳捕获和封存（BECCS）是缓解全球变暖的一种有前途的方法。我们使用一个混合整数非线性规划（MINLP）模型来研究碳封存信用，捕获率，生物炼制能力，原料和预处理选择对乙醇生物炼制系统的性能的影响。我们发现，使用原料和预处理方法的生物炼制，导致发酵和厌氧消化的碳排放量较高，往往具有较低的平均碳捕获成本。具有高生物质乙醇产率的生物精炼厂，例如使用稀酸预处理的生物精炼厂，如果购买能量，可以捕获原料中高百分比的碳，但是从残余物燃烧可获得的较少过量能量限制了能量自给自足的生物精炼厂的碳捕获。使用木质素含量高或能量需求低的原料的生物精炼厂产生最多的过剩能量，这使得捕获率更高。重要的是，我们发现，包括潜在的碳捕获技术可以增加成本最优的生物炼制能力。对于使用加工站和铁路运输的生物精炼厂，增加产能对系统的温室气体平衡和能源消耗的影响最小。
Bioenergy with carbon capture and sequestration (BECCS) is a promising method for global warming mitigation. We use a mixed-integer nonlinear programming (MINLP) model to examine the impact of carbon sequestration credits, capture rates, biorefinery capacity, feedstock, and pretreatment selection on the performance of an ethanol biorefinery system. We find that biorefineries using feedstocks and pretreatment methods that lead to higher carbon emissions from fermentation and anaerobic digestion tend to have lower average carbon capture costs. Biorefineries with high biomass to ethanol yields, such as those using dilute acid pretreatment, can capture high percentages of the carbon in the feedstock if energy is purchased, but less excess energy available from residue combustion limits carbon capture at an energetically self-sufficient biorefinery. Biorefineries that use feedstocks with high lignin content or have low energy requirements produce the most excess energy, which enables higher capture rates. Importantly, we find that the inclusion of potential carbon capture technologies can increase the cost-optimal biorefinery capacity. For biorefineries that use processing depots and rail transportation, increasing capacity has minimal impact on the GHG balance and energy consumption of the system.