Determining most effective structural form of nickel-cobalt catalysts for dry reforming of methane
International Journal of Hydrogen Energy, cilt.45, sa.7, ss.4268-4283, 2020 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 45 Sayı: 7
- Basım Tarihi: 2020
- Doi Numarası: 10.1016/j.ijhydene.2019.12.020
- Dergi Adı: International Journal of Hydrogen Energy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Artic & Antarctic Regions, Chimica, Communication Abstracts, Compendex, Environment Index, INSPEC
- Sayfa Sayıları: ss.4268-4283
- Anahtar Kelimeler: Carbon dioxide reforming, Dry reforming, Monolith, Nanowire, Ni–Co catalyst, Structured catalyst
- Boğaziçi Üniversitesi Adresli: Evet
Özet
In this study, catalytic activity of carbon dioxide reforming of methane was investigated over nickel-cobalt catalysts in various structural forms. Catalytic activity tests were performed at the temperatures of 600–800 °C in a micro-flow quartz reactor. SEM-EDX, XRD and XPS studies were also performed to understand the surface morphology of the catalysts. The results showed that 8 wt%Ni-2wt.%Co on wash-coated MgO over monolithic structure led to highest catalytic performances with CH4 and CO2 conversions of 83% and 89% respectively as well as H2/CO ratio of 0.95 at 750 °C. SEM-EDX and XPS results of catalyst spent at 750 °C also showed considerable amount of coke formation; however, the use of 3% oxygen in the feed suppressed the coke formation significantly. The catalyst was stable for 48 h in the presence of O2 (3%) added feed at the temperature of 750 °C.