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.

该项目的目标是扩大以前的努力，使用烷烃作为氢源，直接与硫反应，使烃脱硫。 使用氢气进行脱硫需要昂贵且能源密集的蒸汽重整或天然气的部分氧化。 富氢烷烃提供了替代的氢源，如果它们可以在其加工过程中直接用于以硫化氢的形式除去硫。 在先前的工作中，使用丙烷-噻吩混合物在锌和钴交换的沸石上的反应证明了这一概念的可行性。 目前的工作将这种化学方法扩展到更广泛的阳离子交换沸石，包括甲烷和高级烃在内的氢源，以及更难处理的硫和氮化合物。 此外，将研究耦合氢化-脱氢要求的机制以及阳离子和酸位点在化学中的具体作用，目的是开发预测性结构-功能规则，以指导更有效的催化剂的合成。 这种脱硫技术可以形成高效和环境友好工艺的基础。