Deciphering Reaction Mechanisms of Biomass Upgrading over Zeolitic Materials via Advanced Nuclear Magnetic Resonance (NMR) spectroscopy

通过先进核磁共振 (NMR) 光谱破译沸石材料生物质升级的反应机制

• 批准号: 2787214
• 金额: --
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2787214
• 关键词: Deciphering; Reaction; Mechanisms; Biomass; Upgrading

Catalytic fast pyrolysis (CFP) can support the decarbonisation of fuel and chemical production cycles by opening pathways for the conversion of woody biomass into an upgraded bio-oil that can be further processed to sustainable aviation fuel (SAF) and other biofuels. Currently the mechanisms governing this reaction remains elusive. Of particular interest is the process by which oxygen is removed from the oxygenated biomass and converted into aromatics over a ZSM-5 zeolite catalyst. The research employs a combination of solid-state Nuclear Magnetic Resonance (NMR) techniques, including high resolution magic-angle spinning (HR-MAS), multinuclear multidimensional experiments and the use of ultra-high field spectrometers to capture the intermediates formed during the catalytic upgrading of biomass models, aimed at providing unique insights into the reaction mechanism.A purpose-built reactor has been developed to allow control over reaction conditions and to explore a number of factors such temperature, pressure, and flow rates. Additionally, various chemical model compounds are employed to represent different biomass components (lignin, cellulose, and hemicellulose). The understanding gained from this research will contribute to the development of more efficient zeolitic catalysts for biomass conversion, and aid the transition towards a more renewable energy landscape.

催化快速热解(CFP)可以支持燃料和化学生产周期的脱碳，因为它为木质生物质转化为可进一步加工成可持续航空燃料(SAF)和其他生物燃料的升级生物油开辟了途径。目前，控制这一反应的机制仍然难以捉摸。特别令人感兴趣的是从氧化后的生物质中去除氧气并在ZSM-5沸石催化剂上转化为芳烃的过程。这项研究结合了固体核磁共振技术，包括高分辨率魔角旋转(HR-MAS)、多核多维实验和使用超高场光谱仪捕捉生物质模型催化升级过程中形成的中间体，旨在为反应机理提供独特的见解。专门建造的反应器已经开发出来，允许控制反应条件，并探索一些因素，如温度、压力和流速。此外，还使用不同的化学模型化合物来表示不同的生物质成分(木质素、纤维素和半纤维素)。从这项研究中获得的理解将有助于开发更有效的生物质转化沸石催化剂，并有助于向更多可再生能源的过渡。