http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Zhiying Liu,Yulin Li,Xiaohui Sun,Zhuyin Sui,Xiufeng Xu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-
This study explored the feasibility of coupling N2O decomposition with ethylbenzene (EB) oxidativedehydrogenation, as an alternative approach for greenhouse gas elimination and styrene (ST) production,on the Co-Al mixed oxides and K-modified catalysts. It was found that N2O could decompose completelyover the K/Co2AlO4 catalyst, accompanied with 62.0% of EB conversion and 85.1% of styrene selectivity,which were much better than the existing catalyst systems for EB oxidative dehydrogenation. Characterization results showed that despite the decreased specific surface area of the catalysts withincreasing the Co/Al molar ratio, the improved reducibility, the reduced acid properties as well as thehigher ratio of Co3+/Co2+ were responsible for the enhanced performance. The K modification not onlychanged the electronic properties of active metal, resulting from the charge transfer from K cation tothe Co species, but also weakened the binding energy of Co3+-O, leading to the complete decompositionof N2O. Furthermore, the optimized strong acid properties inhibited the dealkylation or ring-openingreactions and significantly reduced the coke deposition on the catalyst surface, thus improving the STselectivity.