Hemicellulose is a polymer found abundantly in lignocellulosic feedstocks, with many potential market applications. However, there has yet to be a large‐scale commercial process to isolate hemicellulose from lignocellulosic biomass. A techno‐economic assessment for hemicellulose extraction from sugarcane bagasse, switchgrass, and poplar was made. Two isolation processes after alkaline extraction were considered: (1) producing total hemicellulose and (2) producing hemicellulose A (water‐insoluble fraction) only. In a greenfield scenario, a byproduct of the process is sugar, whereas in a co‐location scenario the biomass after hemicellulose extraction is returned to the pulp mill for its fiber value. Operating costs, capital investment, minimum hemicellulose selling price (MHSP), the effect of input material and product prices along with several other process parameters on the MHSP were determined for each scenario. Co‐location scenarios had a dramatically lower capital cost and MHSP relative to greenfield scenarios. This was due to co‐location scenarios utilizing existing biomass processing and utilities equipment and not requiring a sugar‐production process. Among the three biomasses, hemicellulose extraction from sugarcane bagasse had the lowest MHSP for all scenarios, mainly due to a higher hemicellulose extraction yield. Extraction of hemicellulose A from sugarcane bagasse in a co‐location scenario had a low capital cost of 56 million USD and had a reasonable MHSP of 274 USD/t (metric ton). This research indicates that there is reasonable economic potential for hemicellulose extraction from lignocellulosic biomass for applications to replace starch or as a starting material for the production of xylo‐oligomeric prebiotics. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

中文翻译：

---

从不同类型的木质纤维素原料中提取半纤维素的技术经济分析和成本优化策略

半纤维素是在木质纤维素原料中大量发现的聚合物，具有许多潜在的市场应用。但是，尚未有大规模的商业流程可将半纤维素与木质纤维素生物质分离。对甘蔗渣，柳枝switch和杨树中的半纤维素进行了技术经济评估。考虑了碱提取后的两个分离过程：（1）仅生产总半纤维素和（2）仅生产半纤维素A（水不溶级分）。在未开发的环境中，该过程的副产品是糖，而在共置环境中，半纤维素提取后的生物质因其纤维价值而返回制浆厂。运营成本，资本投资，最低半纤维素售价（MHSP），针对每种情况，确定了原料和产品价格以及MHSP上其他几个工艺参数的影响。与绿地方案相比，共址方案具有显着降低的资本成本和MHSP。这是由于利用现有生物质加工和公用设施设备进行共址场景，而不需要制糖过程。在这三种生物量中，从甘蔗渣中提取半纤维素的MHSP在所有情况下均最低，这主要是由于半纤维素的提取得率较高。在同一地点从甘蔗渣中提取半纤维素A的资本成本低至5600万美元，合理的MHSP为274美元/吨（公吨）。这项研究表明，从木质纤维素生物质中提取半纤维素具有合理的经济潜力，可用于替代淀粉或用作生产木糖寡聚益生元的原料。©2019化学工业协会和John Wiley＆Sons，Ltd