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首页> 外文期刊>Energy Conversion & Management >A new insight into sugarcane biorefineries with fossil fuel co-combustion: Techno-economic analysis and life cycle assessment
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A new insight into sugarcane biorefineries with fossil fuel co-combustion: Techno-economic analysis and life cycle assessment

机译：与化石燃料一起燃烧的甘蔗生物精炼厂的新见解：技术经济分析和生命周期评估

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In this study, alternative lignocellulosic biorefineries annexed to a typical sugarcane mill were investigated, to produce ethanol, lactic acid or methanol, or co-production of ethanol and lactic acid, all with surplus electricity for sale by conversion of sugarcane bagasse and harvesting residues (brown leaves) as accessible feedstock. In order to meet the energy demand of the sugar mill and biorefinery, burning a portion of feedstock or fossil source (coal) along with residues in the centralized combined heat and power unit were assumed as energy supplement strategies. A thorough Aspen Plus simulation was developed for each biorefinery scenario considering all required process units and supplementary units (i.e. combined heat and power, waste water treatment and evaporation). Furthermore, mass and energy balances along with costing data were applied to carry out techno-economic analysis, Monte Carlo finical risk study and life cycle assessment, in a multi-criteria desirability matrix. The lactic acid production biorefinery was found to be the most energy intensive process with highest chemical consumption and the highest conversion of biomass carbon input to products. Consumption of coal as an alternative source of energy enhanced the available biomass for valorization. Biorefineries with coal combustion producing ethanol or ethanol-lactic acid showed better environmental performance than methanol producing biorefineries, based on 1 ton of product. Although, the co-production of ethanol and lactic acid showed the largest likelihood of economic success, Methanol producing scenarios had a zero likelihood of an economic viability without substantial financial incentives or enhanced market prices.
机译：在这项研究中，研究了典型的甘蔗糖厂所附的其他木质纤维素生物精炼厂，以生产乙醇，乳酸或甲醇，或联合生产乙醇和乳酸，所有这些都具有多余的电能，可通过转化甘蔗渣和收获残余物来出售（棕叶）作为可获取的原料。为了满足制糖厂和生物炼制厂的能源需求，将部分原料或化石源（煤）以及残渣与集中式热电联产装置一起燃烧作为能量补充策略。针对每个生物精炼厂方案，针对所有必需的工艺单元和辅助单元（即热电联产，废水处理和蒸发）进行了全面的Aspen Plus模拟。此外，在多标准可取性矩阵中，质量和能量平衡以及成本数据被用于进行技术经济分析，蒙特卡洛最终风险研究和生命周期评估。发现乳酸生产生物精炼是最耗能的过程，具有最高的化学消耗量和生物质碳输入到产品的最高转化率。煤炭作为替代能源的消费增强了可利用的生物量进行增值。以1吨产品为基准，燃煤生产乙醇或乙醇-乳酸的生物炼油厂比甲醇生产的生物炼油厂具有更好的环境性能。尽管联合生产乙醇和乳酸显示出最大的经济成功可能性，但在没有实质性财务诱因或市场价格上涨的情况下，甲醇生产情景的经济可行性可能性为零。

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