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A kind of honeycomb ultra-low temperature denitrification catalyst and preparation method thereof

A denitrification catalyst and ultra-low temperature technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult processing and molding, low catalytic efficiency of ultra-low temperature denitrification catalysts, etc., to improve molding performance, good Anti-poisoning performance, improve the effect of interaction

Active Publication Date: 2021-12-31
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a honeycomb ultra-low temperature denitration catalyst and its preparation method to solve the problems of low catalytic efficiency and difficulty in processing and molding of ultra-low temperature denitration catalysts in the prior art

Method used

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  • A kind of honeycomb ultra-low temperature denitrification catalyst and preparation method thereof
  • A kind of honeycomb ultra-low temperature denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The 5wt.% methylamine of 80L and the 5wt.% ethanolamine aqueous solution of 20L form mixed solvent; 17.91kg vanadyl sulfate, 29.14kg vanadyl acetylacetonate, 6.43kg ammonium metavanadate, 1.31kg ferrous tungstate, 1.28 kg ammonium molybdate joins in the mixed solvent and dissolves and forms solution A;

[0029] Dissolve 1.38kg of tetrabutylammonium fluoride in 60L of deionized water to form mixed solution C;

[0030]Add 763.92kg of titanium dioxide, 28.65kg of hydroxypropyl methylcellulose and 19.10kg of pore-forming agent polyethylene oxide into the mixer, add 100.0L of water and 30.0L of ammonia solution into the mixer, and stir at high speed for 3 minutes; Add solution A slowly to the mixer, and stir at high speed for 30 minutes; then add solution C, 14.32kg of pulp fiber, 57.29kg of glass fiber, and 28.65kg of lactic acid, and stir at high speed for 10 minutes; add 190.98kg of titanium dioxide again, stir at high speed for 30 minutes, and adjust with ammonia water ...

Embodiment 2

[0033] The 15wt.% methylamine of 40L, the 15wt.% ethanolamine aqueous solution of 40L and the 15wt.% n-butylamine aqueous solution of 60L form a mixed solvent; Ammonium, 26.93kg vanadyl oxalate, 21.88kg ammonium tungstate, 20.00kg ammonium paratungstate, 21.26kg ammonium metatungstate, 26.20kg ferrous tungstate, 34.42kg ammonium phosphotungstate, 47.23kg ammonium dimolybdate, 29.74kg molybdenum acetate , 24.53kg ammonium heptamolybdate and 26.60kg magnesium molybdate are dissolved in mixed solvent to form mixed solution A;

[0034] Dissolve 9.30 kg of diammonium hydrogen phosphate, 8.10 kg of ammonium dihydrogen phosphate, 17.43 kg of hexaethylammonium phosphorous acid and 14.31 kg of ammonium phosphate in 60 L of deionized water to form mixed solution B;

[0035] 17.75kg of boric acid, 9.07kg of pentaborane, 5.43kg of sodium borohydride, 13.76kg of tetrabutylammonium fluoride, 19.47kg of hydrofluoric acid and 9.74kg of ammonium fluoride were dissolved in 20L of deionized wate...

Embodiment 3

[0039] The 10wt.% methylamine of 30L, the 10wt.% ethanolamine aqueous solution of 30L and the 15wt.% ethylenediamine aqueous solution of 50L form mixed solvent respectively with 35.83kg vanadyl sulfate, 14.57kg acetylacetonate vanadyl, 13.46kg vanadyl oxalate, 10.94 kg ammonium tungstate, 40.00kg ammonium paratungstate, 10.63kg ammonium metatungstate, 13.10kg ferrous tungstate, 17.21kg ammonium phosphotungstate, 11.81kg ammonium dimolybdate, 14.87kg molybdenum acetate, 61.33kg ammonium heptamolybdate and 12.80 kg magnesium molybdate dissolves to form mixed solution A;

[0040] Dissolve 1.86kg of diammonium hydrogen phosphate in 10L of deionized water to form mixed solution B;

[0041] 3.55kg of boric acid, 3.63kg of pentaborane, 3.26kg of sodium borohydride, 27.52kg of tetrabutylammonium fluoride, 3.16kg of hydrofluoric acid and 3.89kg of ammonium fluoride were dissolved in 40L of deionized water to form a mixed solution C;

[0042] Add 631.2kg of titanium silicon powder, 7.4...

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Abstract

The invention discloses a honeycomb ultra-low temperature denitrification catalyst and a preparation method thereof. Titanium dioxide or titanium silicon powder is used as a raw material, and a small amount of metal salt, a structural aid, a pore-forming agent and a binder are added, and the catalyst is kneaded, aged , extrusion drying and other steps to obtain. The mass percent composition of each active component of this catalyst is: V 2 o 5 2.5‑5 wt.%, WO 3 0.1‑10 wt.%, MoO 3 0.1‑10 wt.%, TiO 2 76‑96.39 wt.%, and at least one of the following components: SiO 2 0.01‑3 wt.%, B 2 o 3 0.01‑2 wt.%, P 2 o 5 0.01-2 wt.%, F 0.01-2 wt.%. The catalyst has low operating temperature (120-160°C), good catalytic activity (denitrification efficiency ≥ 90%), and anti-SO 2 、H 2 O poisoning ability and other characteristics, can be applied to flue gas denitrification under ultra-low temperature conditions.

Description

technical field [0001] The invention relates to a denitration catalyst and a preparation method thereof, in particular to a honeycomb ultra-low temperature denitration catalyst and a preparation method thereof, and belongs to the fields of environmental protection catalyst development and air pollutant control. Background technique [0002] Nitrogen oxides (NOx) produced during industrial combustion are one of the main air pollutants and the focus of controlling air pollutants. Among many denitrification technologies, selective catalytic reduction technology (SCR, selective catalytic reduction) is currently the most efficient and widely used technology. After nearly 10 years of technology introduction and independent research and development of commercial vanadium-titanium-based denitrification catalysts, the problem of flue gas pollutant control in coal-fired power plants has been basically solved. [0003] The treatment of flue gas pollutants in non-electricity industries...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J27/16B01J35/04B01J35/10B01J37/00B01J37/08B01D53/56B01D53/58B01D53/86
CPCB01J23/8885B01J27/16B01J23/002B01J37/0018B01J37/088B01D53/8628B01J2523/00B01D2257/404B01D2257/406B01D2258/0283B01J35/30B01J35/56B01J35/613B01J2523/47B01J2523/55B01J2523/68B01J2523/69B01J2523/842B01J2523/305B01J2523/41B01J2523/51Y02C20/30
Inventor 唐志诚张国栋韩维亮
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI