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An environmentally friendly catalyst for synergistic removal of dioxins and nitrogen oxides

An environmentally friendly, nitrogen oxide technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve the complex production process and secondary pollution. , short service life and other problems, to achieve the effect of simple preparation process, environmental friendliness, and cost reduction

Active Publication Date: 2022-04-26
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the disadvantages of existing catalysts that cause secondary pollution to the environment, short service life, and complicated manufacturing processes, one of the purposes of the present invention is to provide an environmentally friendly catalyst for synergistically removing dioxins and nitrogen oxides. The second is to provide an environmentally friendly catalyst for the synergistic removal of dioxins and nitrogen oxides.

Method used

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  • An environmentally friendly catalyst for synergistic removal of dioxins and nitrogen oxides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of carrier

[0027] Calculated by preparing 100 g of carrier. According to the molar ratio of Mg / Al / Si element is 1:1:2, take an appropriate amount of MgO 2 , pseudoboehmite and SiO 2 Mixed, stirred and ball milled for 2h to make embryo body. The embryo body is prepared into spherical particles with a diameter of 1 cm through an extrusion molding machine, and the particles are dried at 100°C, and then fired at 1000°C for 10 hours to obtain MAS composite functional ceramics.

[0028] (2) Preparation of precursor solution

[0029] Based on 5% loading of active components and 1% loading of active catalytic promoters, the molar ratio of Mo / Sn / Nb is 1:0.1:0.1, and the molar ratio of Ni / Ce / W / Co is 1:0.1: 0.1:0.1, weigh an appropriate amount of ammonium molybdate, tin oxalate, niobium oxalate, nickel nitrate, cerium nitrate, ammonium tungstate and cobalt acetate, add 1 wt% acetic acid of the carrier mass and 30 wt% deionized water of the carrier mass, and t...

Embodiment 2

[0033] (1) Preparation of carrier

[0034] Calculated by preparing 100 g of carrier. According to the molar ratio of Mg / Al / Si element is 1:1:2, take an appropriate amount of MgO 2 , pseudoboehmite and SiO 2 Mixed, stirred and ball milled for 5h to make embryo body. The embryo body is prepared into spherical particles with a diameter of 1cm through an extrusion molding machine, and the particles are dried at 130°C, and then fired at 1100°C for 8 hours to obtain MAS composite functional ceramics.

[0035] (2) Preparation of precursor solution

[0036]Based on 5% loading of active components and 1% loading of active catalytic promoters, the molar ratio of Mo / Sn / Nb is 1:0.1:0.1, and the molar ratio of Ni / Ce / W / Co is 1:0.1: 0.1:0.1, weigh an appropriate amount of molybdenum nitrate, tin oxalate, niobium oxalate, nickel acetate, cerium sulfate, ammonium tungstate and cobalt acetate, add nitric acid with a carrier mass of 1wt% and carrier mass of 30wt% deionized water, and then U...

Embodiment 3

[0040] (1) Preparation of carrier

[0041] Calculated by preparing 100 g of carrier. According to the molar ratio of Mg / Al / Si element is 1:1:2, take an appropriate amount of MgO 2 , pseudoboehmite and SiO 2 Mixed, stirred and ball milled for 8h to make embryo body. The embryo body is prepared into spherical particles with a diameter of 1cm through an extrusion molding machine, and the particles are dried at 150°C, and then fired at 1200°C for 6 hours to obtain MAS composite functional ceramics.

[0042] (2) Preparation of precursor solution

[0043] Based on the active component loading of 10% and the active catalytic promoter loading of 1.5%, the Mo / Sn / Nb element molar ratio is 1:0.25:0.25, and the Ni / Ce / W / Co element molar ratio is 1:0.5: 0.5:0.5, weigh an appropriate amount of molybdenum nitrate, tin oxalate, niobium oxalate, nickel nitrate, cerium nitrate, ammonium metatungstate and cobalt nitrate, add nitric acid with a carrier mass of 3wt% and carrier mass of 35wt% de...

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Abstract

The invention discloses an environment-friendly catalyst for synergistically removing dioxins and nitrogen oxides, which consists of a carrier, an active component and a catalytic assistant; the carrier is Mg 2 AlO 5 ‑Al 2 o 3 ‑SiO2 2 Composite functional ceramics MAS with Mo‑Sn‑Nb‑O active component x Composite metal oxide, catalytic promoter is Ni‑Ce‑W‑Co‑O x composite metal oxides. The catalyst components provided by the invention are environmentally friendly, use will not cause secondary pollution, and the preparation process is simple, and can achieve synergistic removal of dioxin and NO x , Synergistic removal of dioxin and NO in the range of 150‑350 °C x The efficiency is more than 90%, which can save the space occupied by SCR equipment and capital investment, and effectively reduce the cost of flue gas treatment for enterprises. It can be widely used in industry and has broad prospects.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly catalytic materials and air pollution control, and relates to a catalyst for synergistically removing dioxins and nitrogen oxides, in particular to an environment-friendly catalyst for synergistically removing dioxins and nitrogen oxides. Background technique [0002] At present, the phenomenon of "garbage siege" is becoming more and more serious. In the process of municipal waste disposal, waste incineration technology has advantages in realizing waste reduction, harmlessness and resource utilization, so it has been widely used. However, a large amount of secondary pollution produced in the incineration process, including dioxins, nitrogen oxides (NO x ), dust, SO 2 etc., become the bottleneck of the development and application of incineration technology. Among them, dioxin and NO x With strong carcinogenicity, teratogenicity, and mutagenicity, it is the main culprit of smog and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/64B01D53/70
CPCB01J23/002B01D53/8662B01D53/8665B01J23/8898B01J2523/00B01D2257/2064B01D2257/602B01J2523/22B01J2523/31B01J2523/41B01J2523/68B01J2523/845B01J2523/43B01J2523/56B01J2523/847B01J2523/3712B01J2523/69
Inventor 杨波王心周彭奥会黄琼蔡炜
Owner NANJING UNIV OF INFORMATION SCI & TECH