Four alternative, sugar-derived chemical intermediates were compared for the production of propylene and acrylonitrile in energy self-sufficient biorefineries, annexed to an existing sugarcane mill, to assess economic feasibility and environmental sustainability. Aspen Plus® process simulations considered ethanol and isopropanol produced from A-molasses as intermediates for propylene production, while propylene and 3-hydroxypropionic acid (3-HP) from A-molasses were compared for acrylonitrile production. The minimum selling prices (MSPs) for propylene-from-ethanol (3634 $/t), propylene-from-isopropanol (8151 $/t), acrylonitrile-from-propylene (4698 $/t), and acrylonitrile-from-3-HP (5957 $/t) were 280 %, 752 %, 302 % and 409 % above the market prices of fossil-based equivalents. Nonetheless, the propylene biorefineries achieved up to 97 % reduction in greenhouse gas (GHG) emissions, whilst acrylonitrile biorefineries had up to 43 % reduction compared to fossil-based production processes. Based on process yields, energy demand and GHG emissions, ethanol was identified as the preferred intermediate route for all four biorefinery scenarios, while substantial price-premiums will be required for industrial production.

中文翻译：

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甘蔗生物精炼厂中的生物基丙烯和丙烯腈生产：通过技术经济和环境评估确定首选生产路线


对四种替代性糖衍生化学中间体在能源自给自足的生物精炼厂（附属于现有甘蔗厂）生产丙烯和丙烯腈的情况进行了比较，以评估经济可行性和环境可持续性。 Aspen Plus® 工艺模拟将 A-糖蜜生产的乙醇和异丙醇视为丙烯生产的中间体，同时对 A-糖蜜生产的丙烯和 3-羟基丙酸 (3-HP) 进行丙烯腈生产的比较。乙醇制丙烯（3634 美元/吨）、异丙醇制丙烯（8151 美元/吨）、丙烯制丙烯腈（4698 美元/吨）和 3 制丙烯腈的最低销售价格（MSP） -HP（5957 美元/吨）比化石基产品的市场价格高出 280%、752%、302% 和 409%。尽管如此，与化石生产工艺相比，丙烯生物精炼厂的温室气体 (GHG) 排放量减少了 97%，而丙烯腈生物精炼厂的温室气体排放量减少了 43%。根据工艺产量、能源需求和温室气体排放，乙醇被确定为所有四种生物精炼方案的首选中间路线，而工业生产将需要大量的溢价。