Bridging the Time Gap: A Copper/Zinc Oxide/Aluminum Oxide Catalyst for Methanol Synthesis Studied under Industrially Relevant Conditions and Time Scales

详细信息    查看全文

• 作者：Dr. Thomas Lunkenbein ; Dr. Frank Girgsdies ; Dr. Timur Kandemir ; Dr. Nygil Thomas ; Prof. Dr. Malte Behrens ; Prof. Dr. Robert Schlö ; gl and Dr. Elias Frei
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：October 4, 2016
• 年：2016
• 卷：55
• 期：41
• 页码：12708-12712
• 全文大小：2161K
• ISSN：1521-3773

文摘

Long-term stability of catalysts is an important factor in the chemical industry. This factor is often underestimated in academic testing methods, which may lead to a time gap in the field of catalytic research. The deactivation behavior of an industrially relevant Cu/ZnO/Al₂O₃ catalyst for the synthesis of methanol is reported over a period of 148 days time-on-stream (TOS). The process was investigated by a combination of quasi in situ and ex situ analysis techniques. The results show that ZnO is the most dynamic species in the catalyst, whereas only slight changes can be observed in the Cu nanoparticles. Thus, the deactivation of this catalyst is driven by the changes in the ZnO moieties. Our findings indicate that methanol synthesis is an interfacially mediated process between Cu and ZnO.