Highly dispersed gallium-based catalysts for the non-oxidative dehydrogenation of methanol to formaldehyde and hydrogen

用于甲醇非氧化脱氢制甲醛和氢气的高度分散镓基催化剂

• 批准号: 524497718
• 负责人: Professor Dr. Martin Muhler
• 金额: --
• 依托单位: Lehrstuhl für Technische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/524497718?language=en
• 关键词: Highly; dispersed; gallium; based; catalysts

Formaldehyde is one of the most important industrial chemicals which is mainly used for the production of resins or as a building block for the synthesis of other chemical compounds. The direct dehydrogenation of methanol is of great interest, because it results in water-free formaldehyde and hydrogen as a second valuable product. Although gallium oxide-based catalysts have been shown to display an excellent initial performance for methanol dehydrogenation in terms of activity and selectivity, their deactivation rate is also relatively high. This is a well-known problem which is encountered frequently with dehydrogenation catalysts, e. g. for propane dehydrogenation. Deactivation of these catalysts is typically due to coking and structural changes. The elimination of these detrimental processes would provide a new type of promising Ga-based catalysts. Since their application in methanol dehydrogenation is rather new, their properties with respect to this reaction will be thoroughly investigated by a comprehensive combination of bulk- and surface-sensitive methods. A research strategy is proposed that aims both at the characterization of the active sites and at tackling the deactivation problems. A systematic catalyst design will be applied to obtain efficiently promoted GaOx/SiO2 and CuxGayOz catalysts, and transient kinetic investigations will be performed to improve their regeneration.

甲醛是最重要的工业化学品之一，主要用于生产树脂或作为合成其他化合物的基本原料。甲醇的直接脱氢引起了极大的兴趣，因为它产生无水的甲醛和氢作为第二有价值的产品。虽然基于氧化镓的催化剂在活性和选择性方面表现出优异的甲醇脱氢初始性能，但其失活率也相对较高。这是一个众所周知的问题，经常遇到的脱氢催化剂，如丙烷脱氢。这些催化剂的失活通常是由于焦化和结构变化。消除这些有害过程将提供一种新型的有前途的ga基催化剂。由于它们在甲醇脱氢中的应用是相当新的，因此它们在该反应中的性质将通过体敏和表面敏方法的综合组合进行彻底研究。提出了一种研究策略，旨在对活性位点进行表征并解决失活问题。采用系统的催化剂设计来获得高效促进的GaOx/SiO2和CuxGayOz催化剂，并进行瞬态动力学研究以提高其再生能力。