Magnetic resonance imaging studies of catalytic monoliths

催化整体的磁共振成像研究

• 批准号: 2905857
• 金额: --
• 依托单位: University of Nottingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 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=studentship-2905857
• 关键词: Magnetic; resonance; imaging; studies; catalytic

This project aims to advance clean air technology for combustion gas management of exhaust from current engines fuelled by gasoline and diesel, but also for new and future generation technology. Vehicle emissions legislation is tightening around the world, including the recently published EUVII standards, and there is a continuing focus on the health consequences of particulate emissions from internal combustion engines (ICE). To meet legislation over the whole range of driving conditions, exhaust filters for current diesel and gasoline exhaust applications may face the challenging requirement of greater than 99.9% filtration efficiency without negatively affecting catalytic performance and fuel efficiency. This stringent filtration target can only be met by gaining a deep understanding of fluid flows in the porous filter medium, both of catalytic coating liquids during manufacturing, and of exhaust gases during operation. The generated know how will be applicable to alternative fuels including systems causing particulate matter from synthetic fuels, to capture unburned NH3 in NH3-ICE or urea particulates from selective catalytic reduction (SCR) on H2-ICE. This project will utilize state of the art magnetic resonance technology, such as rheo-NMR techniques to study the flow of catalytic washcoat slurry into the porous walls of the ceramic material, as arises during fabrication of the monolith, to understand deposition patterns and resultant pore structure. It will also use hyperpolarised xenon MRI, an emerging technology at the forefront of airway imaging in medicine, to study the gas flow patterns in finished monoliths to understand the impact of mass transport heterogeneity on the efficiency of filtration and the activity of the catalyst.

该项目旨在推进清洁空气技术，以燃烧汽油和柴油助长的当前发动机的排气，以及新的和未来的技术。车辆排放立法在全球范围内正在收紧，包括最近发布的EUVII标准，并且一直关注内燃机（ICE）的颗粒物排放的健康后果。为了符合整个驾驶条件的立法，当前柴油和汽油排气应用的排气过滤器可能面临超过99.9％的过滤效率的挑战性要求，而不会对催化性能和燃油效率产生负面影响。只有通过深入了解多孔过滤器介质中的流体流，制造过程中的催化涂层液体以及操作过程中的废气，才能达到这种严格的过滤靶标。生成的人知道如何适用于替代燃料，包括从合成燃料中引起颗粒物的系统，以捕获NH3-ICE中未燃烧的NH3或从H2-ICE上选择性催化降低（SCR）中的NH3冰或尿素颗粒。该项目将利用最先进的磁共振技术，例如RHEO-NMR技术来研究催化式毛衣泥浆的流动到陶瓷材料的多孔壁上的流动，因为在制造单片过程中会出现，以了解沉积模式和产生的孔结构。它还将使用超极化氙MRI，这是一种在医学中气道成像最前沿的新兴技术，以研究成品整体中的气流流量模式，以了解大规模运输异质性对过滤效率和催化剂活性的影响。