Separation of soap, glycerol and water from biodiesel produced in a continuous biodiesel production process

从连续生物柴油生产过程中产生的生物柴油中分离肥皂、甘油和水

• 批准号: 516363-2017
• 负责人: Tyagi, RajeshwarDayal
• 金额: $ 1.82万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639455
• 关键词: Separation; soap; glycerol; water; biodiesel

Biodiesel is produced from renewable lipid feedstocks, such as vegetable oil and animal fats. Generally, oil andmethanol are reacted in the presence of a catalyst to yield biodiesel and glycerol as a by-product. Biodieselobtained after separation from the by-product contains impurities such as soap, water, glycerol and freepotassium ions that affect the performance of biodiesel adversely. These impurities need to be separated frombiodiesel to meet the requirements of ASTM standards. The company, BIO-LIQ INC, tried to eliminateimpurities by using synthetic resins, but the resins imparted H+ ions (acidity) and water into the biodiesel in acontinuous process. Ion-exchange resins having negatively charged sulphonate group are able to removepositively charged impurities (H+, potassium and sodium ions, soap, free glycerol) from the crude biodieselwhile silica-based resin (SIPERNAT) with large surface area for adsorption is capable of trapping all types ofimpurities. In order to respond to the need of the company to purify biodiesel in a continuous process, anappropriate resin needs to be selected which can remove impurities so that the biodiesel follows the ASTMstandards. First, a batch study will be conducted to treat crude biodiesel with different resins. Then, the selectedresin will be tested in a continuous column operation where process parameters (flow-rate, columnback-pressure) and impurities in the purified biodiesel will be continuously monitored. The continuous processof biodiesel purification using column operation is economical, effective and industrially feasible unlikewet-washing techniques requiring a large amount of expensive solvents and produce large amount ofwastewater. The process developed from the proposed research will help BIOLIQ and other industries ofCanada to produce biodiesel in a continuous mode, eliminating the use of large holding tanks.

生物柴油是由可再生的脂质原料，如植物油和动物脂肪生产的。通常，油和甲醇在催化剂的作用下发生反应，产生生物柴油和副产物甘油。从副产物分离得到的生物柴油含有杂质，如肥皂、水、甘油和自由钾离子，这些杂质对生物柴油的性能有不利影响。这些杂质需要从生物柴油中分离出来，以满足ASTM标准的要求。BIO-LIQ公司试图通过使用合成树脂来消除杂质，但树脂在连续的过程中会将H+离子（酸性）和水带入生物柴油。具有负电荷磺酸基的离子交换树脂能够从粗生物柴油中去除带正电荷的杂质（H+，钾和钠离子，肥皂，游离甘油），而具有大吸附表面积的硅基树脂（SIPERNAT）能够捕获所有类型的杂质。为了满足公司在连续过程中净化生物柴油的需要，需要选择一种合适的树脂，可以去除杂质，使生物柴油符合astm标准。首先，将进行批量研究，用不同的树脂处理粗生物柴油。然后，所选树脂将在连续的塔式操作中进行测试，其中将连续监测纯化生物柴油中的工艺参数（流速、柱背压力）和杂质。不像湿法洗涤技术需要大量昂贵的溶剂和产生大量的废水，采用塔式操作连续提纯生物柴油具有经济、有效和工业可行性。从提议的研究中开发的过程将帮助BIOLIQ和加拿大的其他行业以连续模式生产生物柴油，从而消除了大型储罐的使用。