Effect of acidity on Ni catalysts supported on P-modified Al 2 O 3 for dry reforming of methane
| Autor: | Eunpyo Hong, Chae-Ho Shin, Sung Woo Baek, Seonu Bang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Carbon dioxide reforming
Chemistry Inorganic chemistry 02 engineering and technology General Chemistry Coke 010402 general chemistry 021001 nanoscience & nanotechnology medicine.disease 01 natural sciences Catalysis Methane 0104 chemical sciences Propanol chemistry.chemical_compound Desorption medicine Dehydration Particle size 0210 nano-technology |
| Zdroj: | Catalysis Today. 303:100-105 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2017.08.013 |
| Popis: | Phosphorus-modified Al 2 O 3 supports containing different P content were prepared to control the acidity of Ni-impregnated catalysts for application in the dry reforming of methane (DRM). Results from the H 2 -temperature-programmed reduction showed that an increase in P content promoted the formation of an AlPO 4 phase, and resulted in an increase in Ni particle size. Although the initial conversion of CH 4 and CO 2 decreased with increasing P content, the addition of P influenced on the acidic properties of the support and the catalyst. Indeed, a decrease in catalytic deactivation correlated with the decreasing acidity of the P-modified supports and the Ni/P-Al 2 O 3 catalysts, and the acidic properties were determined by the behaviors of the temperature-programmed desorption of iso -propanol (IPA) and the dehydration of IPA. We found that the Ni/Al 2 O 3 catalyst modified by 2 wt.% P exhibited the weakest acidity whilst demonstrating excellent coke resistance and stability over 100 h in the DRM reaction. |
| Databáze: | OpenAIRE |
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