Alkane upgrading by metal metal-modified zeolites

金属金属改性沸石对烷烃的提质

• 批准号: 2276804
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2276804
• 关键词: Alkane; upgrading; metal; modified; zeolites

The development of catalytic materials that can directly and efficiently convert abundant hydrocarbon resources to higher value products remains a major goal of academic and industrial research. In particular, developing routes that utilise methane as a source of carbon to upgrade other hydrocarbon streams is an opportunity to valorise this extremely cheap and abundant feedstock avoiding methane utilisation via the energy intensive production of synthesis gas.Zeolites are widely used as catalysts in refinery and petrochemical processing due to their cost effective nature, robustness and the generally high reaction selectivities they exhibit. (Top. Catal., 2009, 52, 1131) Recent research has shown that metal-modified zeolites are able to activate methane under moderate conditions and that the resulting species can undergo subsequent reactions with other small molecules to form value added products.(ACS Catal., 2016, 6, 2965) The aim of this project is to develop catalytic processes for the simultaneous conversion of methane and other hydrocarbons to higher chemical products. Targeted main group and transition metals, supported on industrially relevant zeolite frameworks will be explored, as will different methods of metal incorporation in order to improve the catalytic functionality and develop structure function models. Active site distributions will be tailored through synthetic methodologies such as selective ion exchange and organometallic grafting. Materials will be screened for alkane activation through spectroscopic techniques (e.g. solid state NMR and DRIFTS), followed by reactivity with small molecules such as ethylene, propylene, and toluene. Catalytic testing will be conducted on an operando DRIFTS facility and on flow reactors (e.g. FlowCat) housed within the group. The mechanisms of reaction will be determined through the use of isotope labelling studies.

开发能够直接有效地将丰富的碳氢化合物资源转化为高价值产品的催化材料仍然是学术界和工业界研究的主要目标。特别是，开发利用甲烷作为碳源来升级其他碳氢化合物流的路线是一个机会，可以使这种极其廉价和丰富的原料增值，避免通过能源密集型的合成气生产来利用甲烷。沸石因其经济高效、坚固耐用和高反应选择性而广泛应用于炼油和石油化工过程中。(顶部。Catal。最近的研究表明，金属修饰的沸石能够在中等条件下激活甲烷，并且所产生的物种可以与其他小分子进行后续反应，形成增值产品。(ACS Catal。（化工学报，2016,6,2965）该项目的目的是开发同时将甲烷和其他碳氢化合物转化为高级化学产品的催化工艺。将探索在工业相关沸石框架上支持的目标主族和过渡金属，以及不同的金属掺入方法，以提高催化功能和开发结构功能模型。活性位点分布将通过选择性离子交换和有机金属接枝等合成方法进行定制。材料将通过光谱技术（如固态核磁共振和DRIFTS）筛选烷烃活化，然后与乙烯、丙烯和甲苯等小分子反应。催化测试将在operando DRIFTS设备和该组内的流动反应器（例如FlowCat）上进行。反应的机理将通过同位素标记研究来确定。