The coproduction of high‐value anthocyanin extract in the cellulosic ethanol process would diversify the co‐product market, increase revenue, and potentially improve the economics of the process. The high anthocyanin concentration in the cob and structural carbohydrates in residual stover make purple corn stover an attractive source for anthocyanin and ethanol coproduction. This study aimed to develop simulation models for processes integrating ethanol production and anthocyanin extraction using purple corn stover, to evaluate their techno‐economic feasibility, and to compare their performance with the conventional ethanol production process using corn stover. The annual ethanol production for plants processing 2000 MT dry feedstock / day was 148.6 million L/year for the integrated processes compared with 222.6 million L/year for the conventional process. Anthocyanin production in the modified processes using dilute acid‐based and water‐based anthocyanin extraction processes was 1779 and 1099 MT/year, respectively. Capital investments for the integrated processes ($448.1 to $443.8 million) were higher than the conventional process ($371.9 million). Due to high revenue from anthocyanin extract, the ethanol production cost for the integrated process using acid‐based anthocyanin extraction ($0.36/L) was 34.5% lower than conventional ethanol production ($0.55/L). The ethanol production cost for the integrated process using water‐based anthocyanin extraction ($0.68/L) was higher than conventional ethanol production due to low ethanol and anthocyanin yields. The minimum ethanol selling price for the integrated process using acid‐based anthocyanin extraction ($0.65/L) was also lower than the conventional process ($0.72/L), indicating an improvement in economic performance. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd

中文翻译：

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利用紫色玉米秸秆联合生产乙醇和花色苷的联产工艺的技术和经济可行性

在纤维素乙醇工艺中联合生产高价值的花色苷提取物将使联产品市场多样化，增加收入，并有可能改善该工艺的经济性。残留秸秆中玉米芯和结构性碳水化合物中的高花青素浓度使紫色玉米秸秆成为花青素和乙醇联产的有吸引力的来源。本研究旨在为使用紫色玉米秸秆生产乙醇生产和花色苷提取的过程开发仿真模型，以评估其技术经济可行性，并将其性能与使用玉米秸秆的常规乙醇生产工艺进行比较。集成工艺每天处理2000吨干原料的工厂的乙醇年产量为1.486亿升/年，相比之下，年产量为222吨。传统工艺年产量为600万升/年。在使用稀酸和水基花青素提取工艺的改良工艺中，花青素的产量分别为每年1779和1099 MT /年。整合过程的资本投资（4.481亿美元至4.438亿美元）高于常规过程的资本投资（3.719亿美元）。由于花青素提取物的高收益，采用酸基花青素提取的集成工艺的乙醇生产成本（$ 0.36 / L）比常规乙醇生产（$ 0.55 / L）低34.5％。由于乙醇和花青素产量低，使用水基花青素提取的集成工艺的乙醇生产成本（0.68美元/升）比常规乙醇生产成本高。使用酸基花青素提取的集成工艺的最低乙醇销售价格（$ 0.65 / L）也低于常规工艺（$ 0.72 / L），表明经济性能有所提高。©2021化学工业协会和John Wiley＆Sons，Ltd