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Catalyst for synergistically purifying multiple pollutants and preparation method thereof

A technology of catalysts and additives, applied in the field of catalysts for synergistic purification of various pollutants and their preparation, can solve the problems of high operating costs, low operating levels, and complicated equipment, and achieves improvement of air quality, protection of health, and reduction of raw materials. cost effect

Pending Publication Date: 2021-12-07
INST OF URBAN SAFETY & ENVIRONMENTAL SCI BEIJING ACAD OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, with the continuous tightening of emission standards, the pollution prevention and control technology has been continuously upgraded. The serial removal process of multiple single pollutant control systems is no longer suitable for the current treatment needs due to the problems of complex equipment and high operating costs. At the same time, Due to the frequent changes in the load of some industrial boilers, parameters such as flue gas temperature and initial concentration of pollutants are unstable, and the operating level is low, and the existing control technology has no effect on the removal of pollutants such as volatile organic compounds (VOCs), CO and Hg. not obvious

Method used

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  • Catalyst for synergistically purifying multiple pollutants and preparation method thereof
  • Catalyst for synergistically purifying multiple pollutants and preparation method thereof
  • Catalyst for synergistically purifying multiple pollutants and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0043] This embodiment provides a kind of catalyst, and its raw material comprises: ammonium metavanadate, ammonium molybdate, triammonium phosphate, cuprous oxide, gamma-alumina and anatase titanium dioxide; By mass ratio, ammonium metavanadate: molybdenum Ammonium acid: triammonium phosphate: cuprous oxide: γ-alumina: anatase titanium dioxide = 1:2:0.5:1:1:24.

[0044] Present embodiment provides the preparation method of above-mentioned catalyst simultaneously, comprises the steps:

[0045] (1) After mixing ammonium metavanadate, ammonium molybdate, triammonium phosphate, cuprous oxide, γ-alumina and anatase titanium dioxide, add them to 50ml deionized water together, and use oxalic acid as an acid-base regulator to adjust the slurry pH to 3.5, stir evenly for 1.5-2 hours, until the mixture is uniform, to obtain the impregnating solution;

[0046] (2) Dry the impregnating solution at 120°C for 4 hours, take it out, place it in a muffle furnace and bake it in sections, firs...

Embodiment 2

[0048] This embodiment provides a kind of catalyst, and its raw material comprises: ammonium metavanadate, ammonium molybdate, ammonium fluoride, lanthanum oxide, gamma-alumina and anatase titanium dioxide; By mass ratio, ammonium metavanadate:molybdic acid Ammonium: ammonium fluoride: lanthanum oxide: γ-alumina: anatase titanium dioxide = 1:2:0.2:1:1:24.

[0049] Present embodiment provides the preparation method of above-mentioned catalyst simultaneously, comprises the steps:

[0050] (1) After mixing ammonium metavanadate, ammonium molybdate, ammonium fluoride, lanthanum oxide, gamma-alumina and anatase titanium dioxide, they are added to 50ml deionized water together, and oxalic acid is used as an acid-base regulator to adjust the concentration of the slurry When the pH reaches 3.5, stir evenly for 1.5-2 hours, until the mixture is uniform, and the impregnation solution is obtained;

[0051] (2) Dry the impregnating solution at 120°C for 4 hours, take it out, place it in ...

Embodiment 3

[0053] This embodiment provides a kind of catalyst, and its raw material comprises: ammonium metavanadate, ammonium molybdate, ammonium fluoride, stannous oxide, gamma-alumina and anatase titanium dioxide; In terms of mass ratio, ammonium metavanadate: molybdenum Ammonium acid: ammonium fluoride: stannous oxide: γ-alumina: anatase titanium dioxide = 1:2:0.1:1:2:23.

[0054] Present embodiment provides the preparation method of above-mentioned catalyst simultaneously, comprises the steps:

[0055] (1) After mixing ammonium metavanadate, ammonium molybdate, ammonium fluoride, stannous oxide, γ-alumina and anatase titanium dioxide, add them to 50ml deionized water together, and use oxalic acid as an acid-base regulator to adjust the slurry pH to 4, stir evenly for 1.5 to 2 hours, until the mixture is uniform, and the impregnating solution is obtained;

[0056] (2) Dry the impregnating solution at 120°C for 4 hours, take it out, place it in a muffle furnace and bake it in section...

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Abstract

The invention relates to the field of environmental catalysis and air pollution treatment, in particular to a catalyst for synergistically purifying multiple pollutants and a preparation method thereof. The catalyst comprises the following raw materials: an active component, an auxiliary agent and a composite carrier, wherein the active component is selected from one or more metal compounds of V, Mo, W, Cu, La, Sn and Nb; the auxiliary agent is ammonium fluoride and / or triammonium phosphate; the composite carrier is a mixture of anatase titanium dioxide and gamma-aluminum oxide; and the pH value of the catalyst is 3 to 10. The catalyst disclosed by the invention can be used for synergistically purifying various pollutants, and especially for synergistically controlling NOx, CO, Hg and VOCs; wherein at the temperature of 200-360 DEG C, the NOx conversion rate reaches 90% or above; the Hg oxidation rate is greater than 95% at the temperature of 150-300 DEG C; the oxidation rate of C3H6 is greater than 50% at 360-420 DEG C; and the CO oxidation rate is greater than 10% at the temperature of 340-420 DEG C.

Description

technical field [0001] The invention relates to the fields of environmental catalysis and air pollution control, in particular to a catalyst for synergistically purifying various pollutants and a preparation method thereof. Background technique [0002] Air pollution has become a major environmental problem that must be faced at present. With the continuous development of industrialization, the types of pollutants have become more diverse, and a series of reactions between pollutants have occurred, resulting in more and more complicated situations such as secondary pollution. In recent years, with the increase of ozone concentration, ozone control will become the main challenge for air pollution control; among them, NOx and volatile organic compounds (Volatile Organic Compounds, VOCs) are the two most important precursors of ozone, It is the main pollutant that causes air quality to exceed the standard, and has a negative impact on climate change, human health and atmospher...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J21/06B01J23/28B01J23/887B01J23/888B01J27/132B01J27/199B01D53/86B01D53/64B01D53/62B01D53/56B01D53/44
CPCB01J27/199B01J27/132B01J21/063B01J21/04B01J23/8885B01J23/8877B01J23/28B01D53/865B01D53/8665B01D53/8687Y02A50/20
Inventor 梁全明左朋莱王晨龙杨子文佟莉张晓曦韩悦高佳佳王堃童亚莉刘洁玉
Owner INST OF URBAN SAFETY & ENVIRONMENTAL SCI BEIJING ACAD OF SCI & TECH
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