Coupling Alkane Dehydrogenation with Hydrogenation Reactions on Cation-Exchanged Zeolites

烷烃脱氢与阳离子交换沸石加氢反应的耦合

• 批准号: 9985701
• 负责人: Enrique Iglesia
• 金额: $ 14万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9985701&HistoricalAwards=false
• 关键词: Coupling; Alkane; Dehydrogenation; Hydrogenation; Reactions

The objective of the project is to extend previous efforts to desulfurize hydrocarbons using alkanes as a source of hydrogen, with reacts directly with sulfur. The use of hydrogen for desulfurization requires expensive and energy-intensive steam reforming or partial oxidation of natural gas. Hydrogen-rich alkanes offer alternative hydrogen sources if they can be used directly during their processing to remove sulfur as hydrogen sulfide. In previous work the feasibility of this concept was demonstrated using reactions of propane-thiophene mixtures on zinc and cobalt exchanged zeolites. The current work extends this chemistry to a broader range of cation-exchanged zeolites, to sources of hydrogen that include methane and higher hydrocarbons, and to more refractory sulfur and nitrogen compounds. In addition, the mechanism of coupled hydrogenation-dehydrogenation requirements and the specific role of cation and acid sites in the chemistry will be studies with the aim to develop predictive structure-function rules that will guide the synthesis of more effective catalysts. This technique for sulfur removal may form the basis for an efficient and environmentally-benign process.

该项目的目的是扩大以前的努力，以使用烷烃作为氢的来源脱硫，并与硫直接反应。 使用氢用于脱硫需要昂贵且能源密集型的蒸汽重整或天然气的部分氧化。 如果可以在加工过程中直接使用以去除硫作为硫化氢，则富含氢的烷烃可提供替代氢源。 在先前的工作中，使用锌和钴交换沸石的丙烷 - 噻吩混合物的反应证明了这一概念的可行性。 当前的工作将这种化学性扩展到了更广泛的阳离子交换的沸石，到包括甲烷和较高碳氢化合物在内的氢，以及更难治性的硫和氮化合物。 此外，耦合氢化 - 脱水要求的机制以及阳离子和酸位点在化学中的特定作用将是研究，目的是制定预测性结构 - 功能函数函数规则，以指导更有效的催化剂的合成。 这种用于去除硫的技术可能是有效且环保过程的基础。