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Preparation method of modified fly ash loaded mn-ce bimetallic denitrification catalyst

A denitrification catalyst and fly ash technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve high temperature, long time, easy agglomeration of catalyst, etc. problem, to achieve the effect of increasing the concentration of free electrons, enhancing the conductivity, and enhancing the catalytic effect

Inactive Publication Date: 2018-05-15
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for preparing denitration catalysts mainly include impregnation method and sol-gel method, but both methods involve long-term high-temperature roasting in the preparation process, that is, muffle furnace roasting, which takes a long time and high temperature during the roasting process. High energy consumption, and the calcined catalyst is easy to agglomerate and has the disadvantage of uneven dispersion

Method used

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  • Preparation method of modified fly ash loaded mn-ce bimetallic denitrification catalyst
  • Preparation method of modified fly ash loaded mn-ce bimetallic denitrification catalyst
  • Preparation method of modified fly ash loaded mn-ce bimetallic denitrification catalyst

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Embodiment 1

[0033] The method for preparing the modified fly ash loaded Mn-Ce bimetallic denitration catalyst in this embodiment comprises the following steps:

[0034] Step 1. Mix fly ash, bentonite and distilled water evenly, extrude them into strips, place the strips in an oven, and dry them at a temperature of 90°C. Then dry the strips after drying. The material is sheared to obtain fly ash particles; the mass ratio of the fly ash and bentonite is 2:1, and the quality of the distilled water is 67% of the total mass of the fly ash and bentonite;

[0035] Step 2, place the fly ash particles described in step 1 in the plasma reactor, then feed oxygen into the plasma reactor, so that the power of the fly ash particles in the plasma reactor is 45W, the gas The flow rate is 40mL / min under the condition of modification treatment 25min, obtains modified fly ash;

[0036] Step 3. Manganese nitrate is loaded onto the modified fly ash described in step 2 by an equal volume impregnation method t...

Embodiment 2

[0054] The method for preparing the modified fly ash loaded Mn-Ce bimetallic denitration catalyst in this embodiment comprises the following steps:

[0055] Step 1. Mix fly ash, bentonite and distilled water evenly, extrude into strips, place the strips in an oven, and dry them at a temperature of 100°C, and then dry the strips after drying. The material is sheared to obtain fly ash particles; the mass ratio of the fly ash and bentonite is 3:1, and the quality of the distilled water is 70% of the total mass of the fly ash and bentonite;

[0056] Step 2, place the fly ash particles described in step 1 in the plasma reactor, then feed nitrogen into the plasma reactor, so that the power of the fly ash particles in the plasma reactor is 50W, the gas The flow rate is 45mL / min under the condition of modification treatment 20min, obtains modified fly ash;

[0057] Step 3. Manganese chloride is loaded onto the modified fly ash described in step 2 by an equal volume impregnation metho...

Embodiment 3

[0062] The method for preparing the modified fly ash loaded Mn-Ce bimetallic denitration catalyst in this embodiment comprises the following steps:

[0063] Step 1. Mix fly ash, bentonite and distilled water evenly, extrude them into strips, place the strips in an oven, and dry them at a temperature of 80°C. Then dry the strips after drying. The material is sheared to obtain fly ash particles; the mass ratio of the fly ash and bentonite is 1:1, and the quality of the distilled water is 60% of the total mass of the fly ash and bentonite;

[0064] Step 2, place the fly ash particles described in step 1 in the plasma reactor, then feed argon into the plasma reactor, so that the power of the fly ash particles in the plasma reactor is 40W, The gas flow rate is 35mL / min and modified for 30 minutes to obtain modified fly ash;

[0065] Step 3. Manganese sulfate is loaded onto the modified fly ash described in step 2 by an equal volume impregnation method to obtain a manganese-contain...

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Abstract

The invention provides a preparation method of a modified fly ash supporting manganese and cerium dual-metal denitration catalyst. The method includes the steps of: 1) extruding, drying and shearing fly ash, bentonite and distilled water to prepare a fly ash granule; 2) modifying the fly ash granule by means of plasma; 3) preparing manganese-supported modified fly ash in a low-temperature plasma roasting manner; and 4) preparing the modified fly ash supporting manganese and cerium dual-metal denitration catalyst in a low-temperature plasma roasting manner. The method is carried out through the low-temperature plasma roasting method which is short in roasting time and low in energy-consumption, the modified fly ash supporting manganese and cerium dual-metal denitration catalyst has good dispersibility, uniform grains, good sulfur resistant performance and strong activity and selectivity, can be used for denitration treatment on flue gas and has good denitration effects.

Description

technical field [0001] The invention belongs to the technical field of denitrification catalyst preparation, and in particular relates to a preparation method of a modified fly ash loaded Mn-Ce bimetallic denitrification catalyst. Background technique [0002] According to the energy state of electrons, gas temperature and particle size, plasma can be divided into low-temperature plasma and high-temperature plasma, and the temperature of high-temperature plasma can reach 10 6 K~10 8 K, generally used in nuclear technology, low-temperature plasma is used for catalyst preparation and material synthesis, and low-temperature plasma includes hot plasma and cold plasma. The gas temperature of hot plasma is close to the electron temperature (tens of electron volts eV) , the system is in an equilibrium state, so it is called equilibrium plasma. On the contrary, although the temperature of electrons in cold plasma is very high (1-10eV) during the discharge process, the temperature o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J37/34B01D53/86B01D53/56C09C1/00C09C3/04
CPCB01D53/565B01D53/8625B01D2258/0283B01J23/34B01J37/349C09C1/00C09C3/048Y02P20/10
Inventor 张蕾沙响玲王禹苏
Owner XIAN UNIV OF SCI & TECH
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