Catalyst aided regeneration of nonaqueous absorbent for low temperature CO2 capture

用于低温二氧化碳捕获的非水吸收剂的催化剂辅助再生

• 批准号: EP/Y026527/1
• 负责人: Xianfeng Fan
• 金额: $ 25.55万
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY026527%2F1
• 关键词: Catalyst; aided; regeneration; nonaqueous; absorbent

Despite substantial progress in the use of renewable energy, fossil fuel still accounts for 80% of global energy sources, which led to 34.9 gigatons of CO2 emissions in 2021. One feasible solution to this problem is the widespread deployment of CO2 capture facilities at large point sources, e.g., coal-fired power plants, which account for over 30% of global CO2 emissions. However, the availability of an economically affordable CO2 capture process is still a grand challenge as the conventional technologies suffer from huge energy requirement (3.5-4.0 Gigajoule per ton of CO2, GJ.tCO2-1) and large equipment size. CATNA-CO2 will respond to this global challenge by combining and developing two emerging technologies, nonaqueous absorbents and catalyst-aided solvent regeneration, to enable an energy-efficient CO2 capture from a typical combustion flue gas (12 v/v% CO2). A smart selection of diluent with a lower heat capacity than water will lower the energy consumption, while catalyst-mediated regeneration will optimize the CO2 desorption at a low temperature, further reducing the regeneration energy consumption. CATNA-CO2 will (i) develop inexpensive catalysts to enable a low-temperature CO2 capture process using a nonaqueous absorbent, and (ii) evaluate the catalytic regeneration process on a bench-scale unit with a focus on desorption kinetics, interfacial area, mass transfer coefficients, and regeneration heat duty. Moreover, synergistic benefits of nonaqueous absorbent and catalytic regeneration on the overall CO2 capture process will be evaluated to assess the reduction in equipment sizing. Solvent regeneration at a low temperature can enable efficient capture facilities to be installed at a wide range of industrial sites to achieve EU 2030 targets of at least 55% reduction in CO2 emissions.

尽管在使用可再生能源方面取得了长足的进展，但化石燃料仍占全球能源的80％，这导致2021年的二氧化碳排放量为34.9千兆的二氧化碳排放。解决这个问题的一种可行解决方案是，在大点源，燃煤电厂，超过30％的二氧化碳二级二级二级配件的大点源捕获设施的广泛部署。但是，由于传统技术遭受巨大的能源需求（3.5-4.0 gigajoule每吨二氧化碳，GJ.TCO2-1）和较大的设备尺寸，因此，经济负担得起的二氧化碳捕获过程的可用性仍然是一个巨大的挑战。 CATNA-CO2将通过结合和开发两种新兴技术，非水吸收剂和催化剂辅助溶剂再生来应对这一全球挑战，从而从典型的燃烧烟道（12 V/V％CO2）中捕获节能CO2。与水的热量低的稀释剂选择的明智选择将降低能源消耗，而催化剂介导的再生将在低温下优化二氧化碳解吸，从而进一步降低再生能量消耗。 CATNA-CO2将（i）开发廉价的催化剂，以使用非液态吸收体进行低温CO2捕获过程，（ii）在基准规模的单元上评估催化再生过程，重点介绍吸南动力学，界面区域，界面区域，质量转移系数和恢复热量。此外，将评估非水吸收和催化再生对整体二氧化碳捕获过程的协同益处，以评估设备尺寸的降低。在低温下的溶剂再生可以使有效的捕获设施安装在众多工业地点，以实现欧盟2030个目标，至少降低了55％的二氧化碳排放量。