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Method for using activated carbon load copper oxide composite catalyst to absorb nitrogenous oxide

A composite catalyst, nitrogen oxide technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problem of poor application effect, affecting the reaction activity and reaction stability of carbonaceous solids, and decreasing reaction conversion rate, etc. problem, to achieve the effect of improving the ability of reaction activity and reaction stability, strong practical value, and high catalytic activity

Inactive Publication Date: 2012-07-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, due to the high temperature of the reduction reaction, the reaction activity and reaction stability of carbonaceous solids are affected, and the reaction conversion rate of NOx decreases sharply with the extension of time, and the actual application effect is not good.

Method used

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  • Method for using activated carbon load copper oxide composite catalyst to absorb nitrogenous oxide
  • Method for using activated carbon load copper oxide composite catalyst to absorb nitrogenous oxide
  • Method for using activated carbon load copper oxide composite catalyst to absorb nitrogenous oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0031] Grind the commercially available coconut shell catalytic activated carbon (GB / T12496-1999) to make the particle size 40-60 mesh; then put 2mol / L HNO 3 The solution was treated at 40°C for 4 hours; cooled, filtered, washed with deionized water until neutral, and dried in a drying oven at 100°C for later use. Take 0.65g, 1.29g, 1.95g, 2.58g of copper nitrate and add 50ml of water to make a solution, add 5g of activated carbon after treatment, stir at medium speed for 1h at room temperature, dip for 4h at 60°C, put it in a drying oven at 120°C The loaded activated carbon was dried for 2 hours; the dried activated carbon loaded with copper salt was added to a box-type resistance furnace, and under the protection of nitrogen, it was calcined at 400°C for 2 hours, and the final product was obtained after cooling. The copper oxide loading in the activated carbon was respectively 5wt%, 10wt%, 15wt%, 20wt%.

[0032] With gained 5wt%, the catalyst product of 10wt% uses XRD, SEM ...

Embodiment 5～8

[0038] Grind the commercially available coconut shell catalytic activated carbon so that the particle size is 40-60 mesh; then add 3mol / L HNO 3The solution was treated at 50°C for 3 hours; cooled, filtered, washed with deionized water until neutral, and dried in a drying oven at 110°C for later use. Take 0.55g, 0.11g, 1.67g, 2.22g of copper sulfate and add them into 50ml of water to make a solution, add 5g of activated carbon after treatment, stir at medium speed for 1h at room temperature, soak at 60°C for 4h, put them in a drying oven at 120°C The loaded activated carbon was dried for 2 hours; the dried activated carbon loaded with copper salt was added to a box-type resistance furnace, and under the protection of nitrogen, it was calcined at 400°C for 2 hours, and the final product was obtained after cooling. The copper oxide loading in the activated carbon was respectively 5wt%, 10wt%, 15wt%, 20wt%.

[0039] Put 1g of catalysts with copper oxide loadings of 5wt%, 10wt%, 1...

Embodiment 9～12

[0043] Grind commercially available coconut shell catalytic activated carbon to make the particle size 40-60 mesh; then add 2mol / L HNO 3 The solution was treated at 60°C for 3 hours; cooled, filtered, washed with deionized water until neutral, and dried in a drying oven at 110°C for later use. Take 0.47g, 0.94g, 1.41g, 1.88g of copper chloride and add 50ml of water to form a solution, add 5g of activated carbon after treatment, stir at medium speed for 1h at room temperature, dip for 4h at 60°C, put it in a drying oven at 120°C The loaded activated carbon was dried for 2 hours; the dried activated carbon loaded with copper salt was added to a box-type resistance furnace, under the protection of nitrogen, it was calcined at 450°C for 2 hours, and the final product was obtained after cooling. The copper oxide loading in the activated carbon was 5wt%, 10wt%, 15wt%, 20wt%, respectively.

[0044] Put 1g of catalysts with copper oxide loadings of 5wt%, 10wt%, 15wt%, and 20wt% into ...

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Abstract

The invention relates to a method for using an activated carbon load copper oxide composite catalyst to absorb nitrogenous oxide, which includes the following steps: 1 the activated carbon load copper oxide composite catalyst is placed in a quartz tube stationary bed reactor, gaseous hourly space velocity (GHSV) is equal to 100,00 -200,00 h-1, concentration of a reaction gas (NO) is 0.1-0.3%, nitrogen serves as a diluent gas, and gas inlet is at normal pressure; 2 activated carbon reduction of nitrogenous oxide adopts either of the manners: at 3 DEG C per minute, heating from a 100 DGC program to 600 DEG C or thermostatic reaction at 450 DEG C, and saturate sodium hydroxide (NaOH) solution is used for absorbing tail gas. The method for using the activated carbon load copper oxide composite catalyst to absorb nitrogenous oxide is simple in process and easy in obtaining raw materials at low cost, avoids using a noble metal catalyst and NH3 and lowers investment and operational cost. Within 240 minutes, the optimum value of nitric oxide (NO) conversion rate is more than 95%. Therefore, the method has a strong ability to maintain high catalytic activity and has high practical value.

Description

technical field [0001] The invention relates to a preparation method of an activated carbon-loaded copper oxide catalyst and its application in treating nitrogen-containing oxides. technical background [0002] Nitrogen oxide is a general term for nitrogen oxides. Nitrogen oxides include: nitrous oxide (N 2 O), nitric oxide (NO), nitrogen dioxide (NO 2 ), nitrogen trioxide (N 2 o 3 ), dinitrogen tetroxide (N 2 o 4 ), nitrogen pentoxide (N 2 o 5 ). Nitrogen oxides are usually a mixture of nitrogen monoxide and nitrogen dioxide as the main components, represented by NOx. [0003] Nitrogen oxides (NOx) produced in industrial production are very harmful air pollutants. This kind of exhaust gas is toxic to the human body, mainly affects the respiratory system, and can cause diseases such as bronchitis and emphysema; form acid rain, acid Fog, pollutes soil, damages plants; forms photochemical smog with hydrocarbons, and at the same time causes serious damage to the ozone...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/56B01J23/72
Inventor 赵勇李志强李国华骈岩杰
Owner HEBEI UNIV OF TECH
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