CORROSION CONTROL STRATEGY FOR CO2 ABSORPTION PROCESS

CO2 吸收过程的腐蚀控制策略

• 批准号: 227585-2013
• 负责人: Veawab, Amornvadee
• 金额: $ 1.6万
• 依托单位: University of Regina
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=524025
• 关键词: CORROSION; CONTROL; STRATEGY; CO2; ABSORPTION

Corrosion is one of the most severe operational problems in the carbon dioxide (CO2) absorption process using aqueous solutions of alkanolamines, especially when carbon steel is used for plant construction. To suppress such severe corrosion to an acceptable level, corrosion inhibitors are widely applied to this process. However, current corrosion inhibitors are heavy metals that are inherently toxic and potentially pose adverse impacts on human health and the environment. Due to the environmental regulations on chemical use and disposal, handling of such toxic corrosion inhibitors and disposal of the process waste are restricted and costly. New corrosion inhibitors which are environmentally acceptable must now be discovered to provide alternatives to industry. The objectives of this proposed research are therefore to formulate environmentally friendly corrosion inhibitors that have capacity for protecting process equipment and piping made of carbon steel in both liquid-phase and vapor phase, and to develop guidelines for best practices in effective application and monitoring of the formulated corrosion inhibitor. The proposed research is divided into three main tasks: 1) evaluation of amine solution corrosion inhibitors, 2) screening and testing for vapor-phase corrosion inhibitors, and 3) formation of corrosion inhibitors. The formulated corrosion inhibitors together with the strategy for effective inhibitor application will be readily available in response to environmental regulations and industrial needs. These inhibitors are expected to replace current heavy metal inhibitors, thus reducing the cost of waste disposal and health risks. This would present an opportunity for Canada to take a leadership role in the area of green chemical use. In addition, practitioners, especially process engineers, would be able to factor in the developed green corrosion inhibitors in their strategy for the design and operation of CO2 capture processes to reduce energy consumption and solution circulating rate or size of process equipment. This would lead to significant savings in both capital and operating costs for CO2 capture, which are otherwise limited by corrosion problems. This would make CO2 capture more economical and environmentally favorable.

腐蚀是使用链烷醇胺水溶液的二氧化碳（CO2）吸收过程中最严重的操作问题之一，尤其是当碳钢用于设备构造时。为了将这种严重的腐蚀抑制到可接受的水平，腐蚀抑制剂被广泛应用于该过程。然而，目前的腐蚀抑制剂是固有毒性的重金属，并且可能对人类健康和环境造成不利影响。由于关于化学品使用和处置的环境法规，此类有毒腐蚀抑制剂的处理和工艺废物的处置受到限制且成本高。现在必须发现环境可接受的新的腐蚀抑制剂，以提供工业替代品。因此，本研究的目的是制定环境友好的缓蚀剂，有能力在液相和气相中保护碳钢制成的工艺设备和管道，并制定有效应用和监测所制定的缓蚀剂的最佳实践指南。本论文的主要工作分为三个方面：1）胺类溶液缓蚀剂的评价; 2）气相缓蚀剂的筛选与测试; 3）缓蚀剂的形成。根据环境法规和工业需求，配制的缓蚀剂以及有效缓蚀剂应用策略将随时可用。这些抑制剂有望取代目前的重金属抑制剂，从而降低废物处理成本和健康风险。这将为加拿大在绿色化学品使用领域发挥领导作用提供一个机会。此外，从业者，特别是工艺工程师，将能够在其用于CO2捕集工艺的设计和操作的策略中考虑所开发的绿色腐蚀抑制剂，以降低工艺设备的能量消耗和溶液循环速率或尺寸。这将导致CO2捕集的资本和运营成本的显著节省，否则会受到腐蚀问题的限制。这将使二氧化碳捕获更加经济和环保。