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Copper-based supported ammoxidation catalyst and preparation method thereof

A supported, ammonia oxidation technology, applied in the field of ammonia escape control and environmental protection, to achieve the effects of high selectivity, improved N2 selectivity, and high activity selectivity

Inactive Publication Date: 2018-05-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the existing NH 3 -Defects of catalysts in the SCO field, the purpose of the present invention is to propose a copper-based supported ammonia oxidation catalyst and its preparation method, which can be used to eliminate ammonia escape from stationary sources and motor vehicle exhaust SCR systems, and to treat aquaculture plants The ammonia gas emitted from agricultural sources has the advantages of non-toxicity, high activity and high selectivity, and can well meet the requirements of practical applications

Method used

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  • Copper-based supported ammoxidation catalyst and preparation method thereof
  • Copper-based supported ammoxidation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] CuO 0.1 / Preparation of ZSM-5 samples

[0028] (1) take by weighing 0.9075g copper nitrate trihydrate and 3g ZSM-5 powder for subsequent use;

[0029] (2) Dissolve the weighed copper nitrate trihydrate in a small amount of deionized water;

[0030] (3) After the copper nitrate trihydrate is completely dissolved, add the weighed ZSM-5 powder therein, and stir at room temperature for 5 minutes;

[0031] (4) After stopping stirring, transfer the obtained solution to a rotary evaporator, and use a rotary evaporator to evaporate at a speed of 500r / min and a water bath temperature of 70°C for 2h to evaporate the solvent;

[0032] (5) Put the evaporated material into an oven at 100°C for 12 hours to obtain a semi-finished product;

[0033] (6) Put the obtained semi-finished product into the muffle furnace, and heat it at 10°C min -1 The temperature was raised to 400°C for 6 hours, and then cooled naturally in the furnace to prepare a copper-based supported ammoxidation ca...

Embodiment 2

[0036] CuO 0.1 / SAPO-34 sample preparation

[0037] (1) Take by weighing 0.9075g copper nitrate trihydrate and 3g H-SAPO-34 powder for subsequent use;

[0038] (2) Dissolve the weighed copper nitrate trihydrate in a small amount of deionized water;

[0039] (3) After the copper nitrate trihydrate is completely dissolved, add the weighed H-SAPO-34 powder therein, and stir at room temperature for 5 minutes;

[0040] (4) After stopping stirring, transfer the obtained solution to a rotary evaporator, and use a rotary evaporator to evaporate at a speed of 400r / min and a water bath temperature of 60°C for 2h to evaporate the solvent;

[0041] (5) Put the evaporated material into an oven at 100°C and dry for 14 hours to obtain a semi-finished product;

[0042] (6) Put the obtained semi-finished product into the muffle furnace, and heat it at 10°C min -1 The temperature was raised to 500°C for 6 hours, and then cooled naturally in the furnace to prepare a copper-based supported am...

Embodiment 3

[0045] CuO 0.1 / SSZ-13 sample preparation

[0046] (1) Take by weighing 0.7500g copper acetate trihydrate and 3g H-SSZ-13 powder for subsequent use;

[0047] (2) Dissolve the weighed copper acetate trihydrate in a small amount of deionized water;

[0048] (3) After the copper acetate trihydrate is completely dissolved, add the weighed H-SSZ-13 powder, and stir at room temperature for 5 minutes;

[0049] (4) After stopping stirring, transfer the obtained solution to a rotary evaporator, and use a rotary evaporator to evaporate at a speed of 500r / min and a water bath temperature of 60°C for 4 hours to evaporate the solvent;

[0050] (5) Put the evaporated material into an oven at 100°C for 12 hours to obtain a semi-finished product;

[0051] (6) Put the obtained semi-finished product into the muffle furnace, and heat it at 10°C min -1 The temperature was raised to 400°C for 8 hours, and then cooled naturally in the furnace to prepare a copper-based supported ammoxidation cat...

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Abstract

The invention discloses a copper-based supported ammoxidation catalyst and a preparation method thereof. The catalyst takes CuO as an active component and is expressed as CuO / M (M represents a supporter), wherein the supporting ratio is m(CuO) / m(M)=0.1. The invention also provides the preparation method of the copper-based supported ammoxidation catalyst. The prepared copper-based supported ammoxidation catalyst is applicable to ammonia gas purification for fixed sources and movable sources and can be applied in the downstream position of an SCR system to eliminate ammonia escape. Meanwhile, the catalyst is also applicable to treatment of ammonia gas produced and exhausted in breeding industry plants and agricultural sources. Compared with other ammoxidation catalysts, the catalyst copper-based supported ammoxidation catalyst taking SSZ-13 as a supporter has the characteristics of no toxicity, high activity, high selectivity and the like, good NH3 conversion rate is realized by the aidof the active component CuO, high Na selectivity is guaranteed by the aid of the supporter SSZ-13, and 90% or above of N2 selectivity can be kept in the whole temperature window. The copper-based supported ammoxidation catalyst has good catalytic activity and N2 selectivity in a wide temperature test interval at 200-400 DEG C.

Description

technical field [0001] The invention belongs to the technical field of ammonia escape control in the field of environmental protection technology, and the designed target treatment object is the ammonia gas escaped from the SCR system in the exhaust gas of fixed sources and motor vehicle (diesel vehicle), and the ammonia gas emitted from the agricultural source of the breeding factory Gas, in particular to a copper-based supported ammoxidation catalyst and a preparation method thereof. Background technique [0002] Ammonia (NH 3 ) is one of the air pollutants. The emission of ammonia gas in the atmosphere mainly comes from various sources such as industry, agriculture, and mobile sources. For example, the well-known denitrification technology - selective catalytic reduction of ammonia (NH 3 -SCR) uses ammonia as reducing agent to reduce NO x , the phenomenon of ammonia escape often occurs due to incomplete reaction, so that the unreacted ammonia is directly discharged in...

Claims

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Application Information

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IPC IPC(8): B01J29/46B01J29/85B01J29/76B01J37/08B01D53/86B01D53/58B01D53/94C01B21/02
CPCB01D53/8634B01D53/9436B01D2258/012B01D2258/02B01D2258/0283B01J29/46B01J29/76B01J29/85B01J37/08C01B21/02Y02A50/20
Inventor 李俊华郭晶晶王驰中陈建军彭悦郝吉明
Owner TSINGHUA UNIV
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