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In-situ synthesis method and applications of CuFe-SAPO-34 catalyst

An in-situ synthesis, cufe-sapo-34 technology, applied in the field of catalysis, can solve the problems such as no relevant reports on the low-temperature water resistance and sulfur poisoning resistance of the catalyst, the metal loading is not easy to control, and the steps are cumbersome, so as to improve the sulfur resistance. Poisoning ability, improving low temperature water resistance, widening temperature window

Inactive Publication Date: 2017-09-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method is cumbersome and requires multiple loads, and the amount of metal loading is not easy to control
The low-temperature water resistance and sulfur poisoning resistance of the obtained catalyst have not been reported.

Method used

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  • In-situ synthesis method and applications of CuFe-SAPO-34 catalyst
  • In-situ synthesis method and applications of CuFe-SAPO-34 catalyst
  • In-situ synthesis method and applications of CuFe-SAPO-34 catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] With pseudoboehmite AlOOH as aluminum source, silica (SiO 2 ) is the source of silicon, phosphoric acid (H 3 PO 4 ) is the phosphorus source, Cu-TEPA is the Cu source, Fe(NO 3 ) 3 9H 2 O is iron source, each raw material is mixed, then add n-propylamine (C 3 h 9 N) is the template agent, stirred overnight until evenly stirred; then put the solution into the reaction kettle, and put the reaction kettle into an oven at 180°C for crystallization for 3 days; after the reaction kettle was fully cooled, stirred and stood still and filtered out impurities Suction filtration, put the filtered sample into an oven at 105°C for 3 hours to dry it; then put the dried sample into a muffle furnace, and heat up to 600°C for 6 hours at a rate of 1°C / min to obtain CuFe-SAPO-34 catalyst prepared by one-step synthesis method. Among them, control AlOOH, H 3 PO 4 , SiO 2 、H 2 The molar ratio of O, Cu salt, tetraethylenepentamine, Fe salt and n-propylamine is 1:1:0.57:77.17:0.12::0...

Embodiment 2

[0069] In this example, the performance of CuFe-SAPO-34 catalysts obtained under different Fe salt additions was investigated.

[0070] Catalyst preparation method: adjust the dosage of Fe, control AlOOH, H 3 PO 4 , SiO 2 、H 2 The molar ratios of O, Cu salt, tetraethylenepentamine, Fe salt and n-propylamine are A (1:1:0.57:77.17:0.12:0.12:0.0095:3.38), B (1:1:0.57:77.17:0.12: 0.12:0.019:3.38), C(1:1:0.57:77.17:0.12:0.12:0.029:3.38), D(1:1:0.57:77.17:0.12:0.12:0.043:3.38). All the other are identical with embodiment 1.

[0071] The catalytic properties of the prepared CuFe-SAPO-34 catalyst at different temperatures are shown in Table 1.

[0072] Catalytic properties of catalysts obtained under different Fe additions in table 1

[0073]

Embodiment 3

[0075] In this example, the properties of CuFe-SAPO-34 catalysts obtained at different crystallization temperatures were investigated.

[0076] Control AlOOH, H 3 PO 4 , SiO 2 、H 2 The molar ratio of O, Cu salt, tetraethylenepentamine, Fe salt and n-propylamine is 1:1:0.57:77.17:0.12::0.12:0.057:3.38, and the crystallization temperature is 150°C and 200°C respectively, and the rest are the same as in the examples 1 is the same. The properties of the prepared CuFe-SAPO-34 catalyst are shown in Table 2.

[0077] The catalytic performance of the catalyst obtained under the different crystallization temperature of table 2

[0078]

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Abstract

The invention discloses an in-situ synthesis method and applications of a CuFe-SAPO-34 catalyst, and belongs to the technical field of catalysis. The method comprises the following steps: adding pseudo-boehmite into deionized water, stirring to dissolve pseudo-boehmite, then adding ortho-phosphoric acid and fumed silica, evenly mixing, then adding copper salts and tetraethylene pentamine, fully stirring, then adding Fe salts and n-propylamine; adding fully stirred gel into a hydrothermal reactor to carry out crystallization, after crystallization reactions, cooling to the room temperature, separating solid crystals from the mother liquor, washing the solid crystals by deionized water until the solid crystals become neutral, drying, and finally burning the solid crystals in the air to obtain the CuFe-SAPO-34 microporous molecular sieve catalyst. The CuFe-SAPO-34 catalyst is synthesized in one step; the loading amount of Fe is optimized; and the catalytic performance and low temperature water resisting performance of the CuFe-SAPO-34 catalyst are prominently improved.

Description

technical field [0001] The invention relates to an in-situ synthesis method and application of a CuFe-SAPO-34 catalyst, belonging to the technical field of catalysis. Background technique [0002] NO x It will cause air pollution problems such as smog, acid rain, and photochemical smog. It is an important air pollutant at present, and it is also a key target of air pollution prevention and control in my country. Fossil fuel combustion brought about by people's industrial production and living activities is the main source of nitrogen oxides (NOx). In anthropogenic sources NO x In emissions, NO from stationary sources represented by flue gas from coal-fired power plants and mobile sources represented by diesel vehicle exhaust x accounts for about 60% of emissions. With the improvement of national emission regulations and standards, mobile source NO x To meet emission standards, a treatment method combining in-machine purification technology and post-treatment technology ...

Claims

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Application Information

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IPC IPC(8): B01J29/85C01B37/08C01B39/54B01D53/94B01D53/56
CPCB01J29/85B01D53/9413B01D2251/2062B01D2258/012C01B37/08C01B39/54
Inventor 谢利娟阮文权邓芸
Owner JIANGNAN UNIV
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