Abstract
Large amounts of industrial waste fly ash (FA) have caused serious pollution to the environment. There are a few reports that this kind of material, with its good thermal stability, can be used as a catalyst support for high-temperature catalytic reactions, and it has a certain application space. Upon the alkali treatment of fly ash, its specific surface area is increased, and it has the potential to be a catalyst support. Using treated fly ash as the carrier, a nickel-based catalyst was prepared via a sol–gel method, and the catalytic performance changes of catalysts with different MgO content levels in the dry reforming of methane are discussed. Under the conditions of a space velocity of 1.8 × 104 mL g−1 h−1 and a reaction temperature of 750 °C, in the presence of Ni/NaFA-M2 (M2 = 20 wt% MgO), the CH4 conversion rate can reach 84%, and it has good reaction stability. This will provide a way to use fly ash and carry out more research.
Highlights
Excessive coal combustion and industrial production have caused a large amount of greenhouse gas emissions and brought about the greenhouse effect, which has restricted the development of society and seriously endangered the living environment of human beings
The results show that a catalyst NiO prepared by the sol–gel method has better dispersibility, and the catalyst has better catalytic activity and carbon deposition resistance
By adding MgO and activated y ash to the composite, loading the active component nickel, and using the sol–gel method to synthesize Ni/ NaFA-MgO catalysts, the catalysts obtained under different MgO contents were extensively characterized and catalytic activity research conducted
Summary
Excessive coal combustion and industrial production have caused a large amount of greenhouse gas emissions and brought about the greenhouse effect, which has restricted the development of society and seriously endangered the living environment of human beings. It is reported that MgO can form a solid solution with NiO because its crystal structure is similar to NiO, so as to improve the sintering resistance of the catalyst It has a good reduction temperature, increases the alkalinity of the catalyst, improves the adsorption of acidic CO2 by the catalyst, and can achieve the purpose of increasing the activity of the catalyst.[25,26,27] By adding MgO and activated y ash to the composite, loading the active component nickel, and using the sol–gel method to synthesize Ni/ NaFA-MgO catalysts, the catalysts obtained under different MgO contents were extensively characterized and catalytic activity research conducted. This research may provide a new approach for FA treatment and develop a cheap and efficient methane dry reforming catalyst with potential industrial application value
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