Reducing the Cost and Energy Requirement of Ethanol Recovery Using Pass-Through Distillation Technology

使用直通蒸馏技术降低乙醇回收的成本和能源需求

• 批准号: 493231-2015
• 负责人: Gillett, Cindy
• 金额: $ 1.82万
• 依托单位: Sheridan Institute of Technology and Advanced Learning
• 依托单位国家: 加拿大
• 项目类别: Applied Research and Development Grants - Level 1
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=602487
• 关键词: Reducing; Cost; Energy; Requirement; Ethanol

Production of bioethanol as a renewable fuel is economically and environmentally significant in Canada, and globally. First-generation bioethanol production is a mature industry primarily based upon starch or sugar-rich feedstock, such as corn or sugarcane. However, the improved environmental benefits of using second-generation feedstock, such as agricultural residue and other cellulosics, are driving the development of new processes to handle those feedstocks. There are many technical challenges that must be addressed before second-generation processes can become commercially viable. Low ethanol concentrations in the fermentation broth of second-generation processes make downstream separation difficult from an engineering and economic perspective. Drystill Holding Inc.'s patented hybrid distillation and gas absorption separation technology may be an economical solution to this problem. Known as "Pass-Through Distillation" technology, Drystill's innovation allows for the removal of ethanol from the fermentation broth to be decoupled from the rectification of ethanol to reach higher purity without the requirement for additional energy by recovering the heat of absorption of ethanol vapours in an aqueous phase.

生物乙醇作为一种可再生燃料的生产在加拿大和全球具有重要的经济和环境意义。第一代生物乙醇生产是一个成熟的行业，主要基于淀粉或富含糖的原料，如玉米或甘蔗。然而，使用第二代原料(如农业残渣和其他纤维素)的环境效益得到改善，正在推动处理这些原料的新工艺的开发。在第二代工艺在商业上可行之前，必须解决许多技术挑战。第二代工艺的发酵液中乙醇浓度较低，从工程和经济角度来看，这使得下游分离变得困难。S专利的混合蒸馏和气体吸收分离技术可能是解决这一问题的一种经济技术。该技术被称为“直通蒸馏”技术，允许从发酵液中脱除乙醇与乙醇的精馏分离，从而通过回收水相中乙醇蒸气的吸收热来获得更高的纯度，而不需要额外的能量。