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，以管理现有汽油和柴油发动机的废气排放，并为新一代和未来一代技术提供技术支持。世界各地的机动车排放法规正在收紧，包括最近发布的EUVII标准，人们继续关注内燃机(ICE)排放的颗粒物对健康的影响。为了满足各种驾驶条件下的法规要求，当前柴油和汽油尾气排放应用的排气过滤器可能面临着在不对催化性能和燃油效率造成负面影响的情况下，过滤效率大于99.9%的挑战性要求。只有深入了解多孔过滤介质中的流体流动，包括制造过程中的催化涂层液体和操作过程中的废气，才能实现这一严格的过滤目标。所产生的技术诀窍将适用于替代燃料，包括从合成燃料中产生颗粒物的系统，以捕获NH3-ICE中未燃烧的NH3或从H2-ICE上的选择性催化还原(SCR)中捕获尿素颗粒。该项目将利用最先进的磁共振技术，如流变学-核磁共振技术，研究在整体陶瓷材料制造过程中，催化涂层浆液流入陶瓷材料多孔壁的情况，以了解沉积模式和所产生的孔结构。它还将使用超极化氙气磁共振成像技术，这是医学呼吸道成像的前沿技术，研究成品整体中的气体流动模式，以了解质量传输不均一性对过滤效率和催化剂活性的影响。