Preparation method of SSZ-13 hydrogen type molecular sieve, and preparation method of SCR catalyst

Abstract

The invention discloses a preparation method of an SSZ-13 hydrogen type molecular sieve, and a preparation method of SCR catalyst, and relates to the technical field of catalyst; the preparation method of the SSZ-13 hydrogen type molecular sieve can shorten the preparation time of the SSZ-13 hydrogen type molecular sieve and reduce the preparation cost, the SCR catalyst can be produced on a largebatch. The preparation method of the SSZ-13 hydrogen type molecular sieve includes steps of mixing aluminum source, template agent and silicon source in the alkali water solution together, and performing gelatinization reaction to obtain gel; under the effect of crystal seed, performing crystallization reaction on the gel, performing the first roasting on the crystalized matter to obtain a first roasting matter; performing ion exchange on the first roasting matter by ammonium salt solution; performing the secondary roasting on the first roasting matter after the ion exchange, so as to obtain the SSZ-13 hydrogen type molecular sieve. The hydrogen type molecular sieve comprises a preparation method of the mentioned SSZ-13 hydrogen type molecular sieve. The SSZ-13 hydrogen type molecular sieve provided by the invention is applied to preparation of the nitric oxide transformation catalyst.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a preparation method of SSZ-13 hydrogen molecular sieve and a preparation method of SCR catalyst. Background technique [0002] Selective catalytic reduction (selective catalytic reduction, abbreviated as SCR) catalyst is a catalyst used in the SCR denitrification system of power plants. In the SCR reaction, the SCR catalyst can promote the selective chemical reaction of the reducing agent with the nitrogen oxides in the flue gas at a certain temperature. [0003] In the prior art, the SCR catalyst is mainly WO 3 or MoO 3 Doped V 2 o 5 / TiO 2 Catalyst, but there are many problems in this catalyst, such as V with biotoxicity 2 o 5 Shedding occurs during use, threatening human health, the operating temperature window is narrow, and the low temperature section is poorly selected. [0004] Based on the above technical problems, a Cu-SSZ-13 catalyst has been developed, which...

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Problems solved by technology

[0003] In the prior art, the SCR catalyst is mainly WO 3 or MoO 3 Doped V 2 o 5 / TiO 2 Catalyst, but there are many problems in this catalyst, such as V with biotoxicity 2 o 5 Shedding occurs during use, threatening human health, the operating temperature window is narrow, and the low temperature section is poorly selected

[0004] Based on the above technical problems, a Cu-SSZ-13 catalyst has been developed, which has high catalytic activity, good hydrothermal stability, and strong resistance to HCs poisoning. It is an excellent SCR catalyst, but the traditional Cu-SSZ- Among the 13 catalysts, the preparation time of hydrogen-type molecular sieves is long and the cost is high, which makes Cu-SSZ-13 catalysts unable to be mass-produced

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