Biomass pyrolysis gasification multifunctional iron-based catalyst and preparation method thereof
An iron-based catalyst, pyrolysis and gasification technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of catalyst absorption adjustment not mentioned, Active metal deactivation, low tar cracking rate and other problems, to achieve good storage / release of oxygen capacity, enhanced interaction, and improve the effect of anti-carbon deposition
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[0018] Example 1
[0019]A preparation method of a biomass pyrolysis gasification multifunctional iron-based catalyst, which comprises the following steps:
[0020] ①Pretreatment of carrier: put 26g CaO in a muffle furnace, at 800 o C was calcined for 4 h, and then ground and sieved to prepare 100 mesh CaO carrier particles.
[0021] ②Introduction of the main active components: mix the pretreated 26g, 100 mesh CaO carrier particles with 15.2mL 0.5g / mL Fe(NO) 3 ) 3 ·9H 2 O solution mix at 80 o Stir and immerse at C for 2h, after the immersion is completed, at 120 o Dried at C for 10h, put the obtained sample in a muffle furnace, at 900 o C was calcined for 3 h, and the calcined samples were placed in a desiccator to cool to room temperature, and then ground.
[0022] ③Introduction of co-active components: the steps The prepared samples were first mixed with 20.2 mL of 0.5 g / mL Ce(NO 3 ) 3 ·6H 2 O solution was mixed and stirred at 60 o Immersion at C for 12h, at 200...
Example Embodiment
[0027] Example 2
[0028] In this example, the preparation method of the catalyst is the same as that in Example 1 and will not be repeated here. %, calcium oxide: 80%.
[0029] Catalyst evaluation was carried out under the same experimental conditions as in Example 1, and it was found that the gas components obtained after the reaction were (volume content): H 2 : 53.8%, CO: 26.9%, CO 2 : 7.2%, CH 4 : 12.1%, tar content is 0.06g / m 3 , the tar conversion rate is 92.5%, H 2 The / CO ratio is 2.0, the catalyst has stable reaction activity, no sintering, and no obvious surface carbon.
Example Embodiment
[0030] Example 3
[0031] In this example, the preparation method of the catalyst is the same as that in Example 1 and will not be repeated here. %, calcium oxide: 60%.
[0032] Catalyst evaluation was carried out under the same experimental conditions as in Example 1, and it was found that the gas components obtained after the reaction were (volume content): H 2 : 49.9%, CO: 27.7%, CO 2 : 6.9%, CH 4 : 15.5%, tar content is 0.09g / m 3 , the tar conversion rate is only 88.7%, H 2 When the / CO ratio was 1.8, the reactivity of the catalyst decreased with the increase of reaction time, but the sintering carbon deposition was not obvious.
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