Steam reforming of acetic acid in the presence of Ni coated with SiO2 microsphere catalysts
| Autor: | Nuray Oktar, Levent Degirmenci, Huseyin Arbag, Gamze Gunduz Meric, Sahika Ozel |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Coke 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis Microsphere Steam reforming Acetic acid chemistry.chemical_compound Fuel Technology chemistry Methanation Acetone 0210 nano-technology Carbon |
| Zdroj: | International Journal of Hydrogen Energy. 45:21252-21261 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.05.146 |
| Popis: | Steam reforming of acetic acid was investigated in the presence of Ni@SiO2 microsphere catalysts. The effects of Ni loading, H2O/AcOH ratio, and temperature on hydrogen selectivity and acetic acid conversion were determined via statistical analysis. Results indicated the dependence of parameters on hydrogen selectivity. The stable activity observed for the reaction conducted at 2.5H2O/AcOH ratio and 750 °C implied future utilization potential of the catalyst for time on stream experiments despite the inevitable coke formation. Boudard reaction and methane decomposition, known as possible carbon sources, was ruled out due to the opposite trends between CO2 and CO selectivities and mitigation of methanation reactions. The ambiguous pattern of conversions observed for varying H2O/AcOH implied the presence of a different reaction path leading to consecutive ketonozation of acetic acid and aldol-condensation of acetone as the primary sources of carbon deposition. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect