Hydrogen production from dry reforming of methane using Ni/MgAl2O4 spinel catalyst via solution combustion method
| Autor: | Pei-Chen Lai, 賴沛晨 |
|---|---|
| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 Since Industrial Revolution, people use fossil fuel as energy sources. At present, the dependence on fossil fuels to meet energy demand have created environmental issues by the generation of anthropogenic greenhouse gases. As the demand for energy increases, it is important to seek alternative energy. Dry reforming of methane reaction has received much attention because it can provide a good way to convert the methane and carbon dioxide into a valuable synthesis gas, which is a mixture of hydrogen and carbon monoxide. However, because both reactants of CH4 and CO2 contain carbon, the dry reforming of methane reaction typically suffers deactivation from severe coke formation. In this study, MgAl2O4 spinel was synthesized by solution combustion method. Then, 10% nickel was impregnated onto the MgAl2O4−supported by impregnation method. We adjusted four parameters (magnesium metal precursor species, fuel type, fuel to oxidizer ratio and synthesis temperature) during the combustion process to realizing the influence of the spinel morphology. The effects of preparation parameters for the spinel supports on catalytic activity for dry reforming of methane reaction were studied. From the results, the MgAl2O4 spinel was highly effective prepared by magnesium nitrate and urea at 500 oC, and that nickel particles dispersed well on the MgAl2O4 support, and it has a strong interaction between Ni and spinel. The Ni/MgAl2O4 inhibited reverse-water shift reaction, which leads to a high catalytic performance and H2/CO. When the combustion reactions of fuel/magnesium metal precursor were carried out in stoichiometric condition, the Ni/MgAl2O4 catalyst generated high catalytic activity and hydrogen yield. As the fuel-to-metal precursor molar ratio increased, the catalyst exhibited high activity and superior anti-coking for dry reforming of methane due to the increased metal-support interaction. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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