Abstract
A series of catalysts of Ag2O-Co3O4/γ-Al2O3was prepared by equivalent volume impregnation method. The effects of the metal loading, calcination time, and calcination temperatures of Ag and Co, respectively, on the catalytic activity were investigated. The optimum preparing condition of Ag2O-Co3O4/γ-Al2O3was decided, and then the influence of different preparation conditions on catalytic activity of Ag2O-Co3O4/γ-Al2O3was analyzed. The results showed the following: (1) at the same preparation condition, when silver loading was 8%, the Ag2O-Co3O4/γ-Al2O3showed higher catalyst activity, (2) the catalyst activity had obviously improved when the cobalt loading was 8%, while it was weaker at loadings 5% and 10%, (3) the catalyst activity was influenced by different calcination temperatures of silver, but the influences were not marked, (4) the catalyst activity can be influenced by calcination time of silver, (5) different calcination times of cobalt can also influence the catalyst activity of Ag2O-Co3O4/γ-Al2O3, and (6) the best preparation conditions of the Ag2O-Co3O4/γ-Al2O3were silver loading of 8%, calcination temperature of silver of 450°C, and calcinations time of silver of 4 h, while at the same time the cobalt loading was 8%, the calcination temperature of cobalt was 450°C, and calcination time of cobalt was 4 h.
Highlights
A series of catalysts of Ag2O-Co3O4/γ-Al2O3 was prepared by equivalent volume impregnation method
This paper discussed the influences of six different preparation conditions of catalyst (Ag2O-Co3O4/γ-Al2O3) activity in loading, calcination time, and calcination temperatures of silver and cobalt, analyzed the influences of different preparation conditions on catalytic Journal of Spectroscopy activity of Ag2O-Co3O4/γ-Al2O3 for hydrogenation of coal pyrolysis, and found the optimum conditions to prepare Ag2O-Co3O4/γ-Al2O3
It can be seen that catalytic activity of Ag2O-Co3O4/γ-Al2O3 was not increased with the silver loading increase
Summary
Humans suffered from serious environmental pollution owing to the burning of fossil fuels. As a kind of nonrenewable energy, fossil fuels are decreasing gradually even drying up in some cases [1]. New energies like hydrogen are becoming important as a kind of replaced energy and playing a more and more important role in primary energy [2,3,4]. Hydrogen can be prepared with fossil fuels or nonrenewable energy [5,6,7]. According to the characteristics of China’s coal resource [1], the preparation for hydrogenation of coal pyrolysis may be more appropriate in reality. The output in simple hydrogenation of coal pyrolysis is low presently, and adding appropriate catalysts will improve the efficiency of traditional coal pyrolysis process because the study of catalyst plays a vital role. Journal of Spectroscopy activity of Ag2O-Co3O4/γ-Al2O3 for hydrogenation of coal pyrolysis, and found the optimum conditions to prepare Ag2O-Co3O4/γ-Al2O3
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