| Ammonia is an important raw material in ammonia synthesis system. Fused iron catalyst occur nearly a century, until the emergence of Fe1-xO catalysts. The catalytic activity step forward. Because of fine crystal grain, the surface area and surface energy can increase. Al3+can not thoroughly solid solution in the lattice of the Fe1-xO leading to produce lattice defects and energy. That is why the Ammomax-10can provide much more energy. To Achieve the improvement of catalytic activity, the promoters distribution and structure of catalysts must be focused on.In this paper, from the view of material science, heat treatment, constant temperature water-aging treatment and liquid nitrogen treatment are used to treat the sample. Using x-ray diffractometer (XRD) to analyze the structure of the sample, Using scanning electron microscope (SEM) and energy spectrum (EDS) to analyze surface topography and element distribution of the sample. Using BET to analyze the performance of anti-poisoning, Using self-made device to evaluate the mechanical properties, thermal stability and activity of the samples after treatment. Experimental results show that:1. By constant temperature water aging treatment, two type of samples appear growth of the grain and loss of the promoters, decline of the catalytic activity. Its anti-poisoning performance also declines, its thermal stability does not change and mechanical property declines.2. By heat treatment methods to deal with specimens, the grains of two type samples appear to grow and promoters solid solution in lattice, the activity of catalyst declines, anti-poisoning performance declines, thermal stability doesn’t change and mechanical properties also decline.3. By liquid nitrogen dealing specimens of two catalysts, catalyst grains grow and distribution of promoters doesn’t change, catalytic activity almost doesn’t changed, antipoiso-ning declines, thermal stability and mechanical properties also doesn’t change. |
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