Development of solid heteropolyacids for tandem reactions along the hemicellulose value chain

开发用于半纤维素价值链串联反应的固体杂多酸

• 批准号: 501103334
• 负责人: Dr. Anna Katharina Beine
• 金额: --
• 依托单位: Lehrstuhl für Energie- und Umweltverfahrenstechnik
• 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/501103334?language=en
• 关键词: Development; solid; heteropolyacids; tandem; reactions

In times of climate change and diminishing fossil resources, the use of renewable carbon sources such as biomass is inevitable. In order to realize the necessary transformations with high selectivity, the implementation of tandem reactions is necessary, which combine acid catalyzed hydration/dehydration and metal catalyzed hydrogenation/dehydrogenation. In this way, unstable intermediates can be directly converted to more stable products and side-reactions can be avoided. This applies, for example, to the production of sugar alcohols from xylan, of furfurylalcohol from xylose or the production of 1,2-propanediol from glycerol. In the research project, a catalyst system consisting of a solid metal catalyst and a solid acid catalyst shall be developed, optimized and tested in tandem reactions along the hemicellulose value chain. The focus lies on the development of heterogenisation strategies for heteropolyacids, which are particularly well suited as catalysts for the investigated reactions. Since the stability of such immobilized catalysts is often low, the synthesized materials will be characterised in detail before and after the reaction to understand deactivation mechanisms. Subsequently, the synthesis strategy can be adapted to come to a competitive catalyst system.

在气候变化和化石资源减少的时代，使用生物质等可再生碳源是不可避免的。为了以高选择性实现必要的转化，实施串联反应是必要的，其将联合收割机酸催化的水合/脱水和金属催化的氢化/脱氢组合。通过这种方式，不稳定的中间体可以直接转化为更稳定的产物，并且可以避免副反应。这适用于例如由木聚糖生产糖醇、由木糖生产糠醇或由甘油生产1，2-丙二醇。在该研究项目中，将开发、优化和测试由固体金属催化剂和固体酸催化剂组成的催化剂系统，用于沿着半纤维素价值链的串联反应。重点在于杂多酸，这是特别适合作为催化剂的研究反应的多相化策略的发展。由于这种固定化催化剂的稳定性通常较低，因此将在反应前后详细表征合成材料，以了解失活机制。随后，可以调整合成策略以形成有竞争力的催化剂体系。