Regeneration method of methane oxygen-free dehydrogenation aromatization catalyst
A dehydrogenation aromatization and catalyst technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low efficiency, complicated operation of carbon elimination and regeneration methods, etc., and achieves elimination of carbon deposits and easy operation. Process and technology, the effect of reducing unnecessary energy consumption
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Embodiment 1
[0032] Ammonium heptamolybdate and HZSM-5 molecular sieve (SiO 2 / Al 2 o 3The molar ratio is 25) as the Mo species precursor and carrier of the Mo / zeolite-supported catalyst to prepare the catalyst Mo / HZSM-5 for the oxygen-free dehydrogenation of methane, where the weight percentage of Mo is 6%. The specific preparation method of the catalyst is as follows: Weigh 3 g of HZSM-5 and immerse in 2.8 ml of 0.122 g / ml ammonium heptamolybdate aqueous solution, ultrasonically disperse for 0.5 h, let it stand for 12 h, and place o Drying at C, 530 o Calcined at C for 10 h, the obtained powdery Mo / HZSM-5 catalyst was pressed into tablets, crushed, and sieved into 20-60 meshes for later use.
[0033] According to the catalyst evaluation method of Comparative Example 1, the methane raw material gas was contacted with the fresh Mo / HZSM-5 catalyst obtained by the above method to carry out the oxygen-free dehydrogenation aromatization reaction of methane. After 2 hours of reaction, witho...
Embodiment 2
[0039] Ammonium heptamolybdate and HZSM-5 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 25) as the Mo species precursor and carrier of the Mo / zeolite-supported catalyst to prepare the catalyst Mo / HZSM-5 for the oxygen-free dehydrogenation of methane, where the weight percentage of Mo is 6%. The specific preparation method of the catalyst is as follows: Weigh 3 g of HZSM-5 and immerse in 2.8 ml of 0.122 g / ml ammonium heptamolybdate aqueous solution, ultrasonically disperse for 0.5 h, let it stand for 12 h, and place o Drying at C, 530 o Calcined at C for 10 h, the obtained powdery Mo / HZSM-5 catalyst was pressed into tablets, crushed, and sieved into 20-60 meshes for later use.
[0040] According to the catalyst evaluation method of Comparative Example 1, the methane raw material gas was contacted with the fresh Mo / HZSM-5 catalyst prepared by the above method to carry out the oxygen-free dehydrogenation aromatization reaction of methane. After 2 hours of reaction, with...
Embodiment 3
[0043] Ammonium heptamolybdate and HZSM-5 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 25) as the Mo species precursor and carrier of the Mo / zeolite-supported catalyst to prepare the catalyst Mo / HZSM-5 for the oxygen-free dehydrogenation of methane, where the weight percentage of Mo is 6%. The specific preparation method of the catalyst is as follows: Weigh 3 g of HZSM-5 and immerse in 2.8 ml of 0.122 g / ml ammonium heptamolybdate aqueous solution, ultrasonically disperse for 0.5 h, let it stand for 12 h, and place o Drying at C, 530 o Calcined at C for 10 h, the obtained powdery Mo / HZSM-5 catalyst was pressed into tablets, crushed, and sieved into 20-60 meshes for later use.
[0044] According to the catalyst evaluation method of Comparative Example 1, the methane raw material gas was contacted with the fresh Mo / HZSM-5 catalyst prepared by the above method to carry out the oxygen-free dehydrogenation aromatization reaction of methane. After 2 hours of reaction, with...
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