乙烷氧化脱氢复合金属氧化物催化剂和微结构化反应器研究

Global ethylene production has turned to the lighter feedstock such as ethane. The catalytic oxidative dehydrogenation of ethane (ODHE) is acknowledged as the most attractive process to produce ethylene, where MoVNbTeOx is one of the most outstanding catalysts for ODHE due to the catalyst performance of high activity and selectivity at low temperatures. This project aims to comprehensively study the preparation methods and catalysis mechanism in the mixed metal oxides catalysts in combination with the phase-pure M1 catalysts obtained from the post-treatment of MoVNbTeOx in order to achieve the promoted conversion, selectivity and catalyst space-time yield of ODHE. Low-temperature plasmas with different atmospheres will be employed to treat the mixed metal oxide catalysts to investigate their effects on the valence state of elements, phase composition, activity and selectivity of the catalysts. The interaction between plasma and catalyst is to be measured in situ by an iCCD-spectrograph system. This series of work is directed to establish an appropriate methodology for the catalyst treatment by plasmas, with special attention to the mechanism of the oxygen transfer from gas to solids. The micro-structured reactor is proposed to facilitate the highly exothermic reaction of ODHE with the advantage of intensified heat transfer behavior, where the key is the catalyst coating technique on the surface of the structured materials such as metal-ceramic complex plate, metal or ceramic foam monolith. The final objective of this project is to build the experimental and theoretical foundation for the modular, micro-structured reactor research with potential industrial perspective in the ODHE process.

在全球乙烯生产原料轻质化趋势下，乙烷催化氧化脱氢制乙烯过程被认为是极具吸引力的乙烯生产新技术，其中MoVNbTeOx催化剂具有低温、高活性、高选择性的特点，是最具工业化潜力的催化剂之一。本项目拟深入研究以MoVNbTeOx中M1纯相催化剂为基础的新型复合金属氧化物催化剂的制备方法和催化机制，旨在提升乙烷氧化脱氢过程的转化率、选择性和催化剂时空收率；考察不同气体氛围的低温等离子体对金属氧化物复合催化剂体系的元素价态、物相组成、活性和选择性的影响规律，利用iCCD-光谱检测系统原位测量等离子体与催化剂相互作用过程，探究气固相氧传递的机制，建立等离子体调控催化剂性能的方法论；研发微结构化反应器催化剂制备技术，优化反应器结构设计，实现高效的乙烷氧化脱氢过程，形成具有工业应用前景的模块化微结构反应器的实验和理论基础。

在全球乙烯生产原料轻质化趋势下，乙烷催化氧化脱氢制乙烯过程被认为是极具吸引力的乙烯生产新技术，其中MoVNbTeOx催化剂具有低温、高活性、高选择性的特点，是最具工业化潜力的催化剂之一。本项目深入研究了MoVNbTeOx中M1纯相催化剂为基础的新型复合金属氧化物催化剂的制备方法和催化机制，通过多种催化剂设计和优化，提升了乙烷氧化脱氢过程的转化率、选择性和催化剂时空收率；考察了不同气体氛围的低温等离子体对金属氧化物复合催化剂体系的元素价态、物相组成、活性和选择性的影响规律，建立了等离子体调控催化剂性能的实验平台；研发了微结构化反应器催化剂制备技术，优化反应器结构设计，实现了高效的乙烷氧化脱氢过程，形成具有工业应用前景的模块化微结构反应器的实验和理论基础。