Nitrous oxides gas adsorbing substance and preparation method thereof

A technology of gas adsorbents and nitrogen oxides, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem of low gas space velocity, achieve high-efficiency adsorption, and improve the effect of adsorption capacity

Inactive Publication Date: 2011-05-04
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activated carbon prepared by the invention has a 2 The adsorption performance of S and VOCs is the best, and the comprehensive adsorption performance of various harmful gases is good, but the space velocity of the treated gas is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation steps of nitrogen oxide gas adsorbent are as follows:

[0033] Prepare 3mL of dilute nitric acid with a concentration of 30% by volume, measure 2.5g of 20-60 mesh shell charcoal as activated carbon and stack it on a surface dish, soak it with dilute nitric acid drops for 0.5h, wash until neutral, and place it in an oven at 150°C Dry for 1h;

[0034] Prepare 3mL of KOH solution with a concentration of 25% by volume, add the solution dropwise on the dried activated carbon and soak it for 1h, then dry it in an oven at 60°C for 3h;

[0035] Prepare 3mL of copper nitrate solution with a concentration of 5% by mass, add the solution dropwise to the dried activated carbon and soak it for 0.5h, then dry it in an oven at 250°C for 3h, and the final active component CuO will account for the nitrogen produced in this example. The overall mass percentage of the oxide gas adsorbent is 3%.

[0036] Embodiment 1 performance evaluation is carried out in U-shaped glass...

Embodiment 2

[0040] Prepare 3 mL of dilute nitric acid with a concentration of 10% by volume. Measure 2.5g of 20-60 mesh coal-based carbon as activated carbon and stack it on a surface dish, add dilute nitric acid dropwise on it, soak for 1 hour, wash until neutral, and dry in an oven at 100°C for 2 hours;

[0041] Prepare 3mL of KOH solution with a concentration of 25% by volume, add the solution dropwise on the dried activated carbon and soak it for 1h, then dry it in an oven at 60°C for 3h;

[0042] Prepare 3mL of copper nitrate solution with a concentration of 5% by mass, add the solution dropwise on the dried activated carbon and impregnate it for 0.5h, then dry it in an oven at 250°C for 3h. The final active component CuO accounted for 3% by mass of the nitrogen oxide gas adsorbent prepared in this example.

[0043] Embodiment 2 performance evaluation is carried out in U-shaped glass tube reactor, and reaction gas volume space velocity (GHSV) is 75000h ～1 , the amount of adsorbent ...

Embodiment 3

[0047]Prepare 3mL of dilute nitric acid with a concentration of 30% by volume. Measure 2.5g of 20-60 mesh wood charcoal as activated carbon and stack it on a watch glass, add dilute nitric acid dropwise on it, soak for 0.5h, wash until neutral, and dry in an oven at 150°C for 1h;

[0048] Prepare 3 mL of KOH solution with a concentration of 5% by volume, add the solution dropwise on the dried activated carbon and soak it for 2 hours, then dry it in an oven at 100°C for 2 hours;

[0049] Prepare 3 mL of ferric nitrate solution with a concentration of 4.5% by mass, add the solution dropwise to the dried activated carbon and soak it for 0.5 h, then dry it in an oven at 250°C for 3 h. Final active component Fe 2 o 3 Accounting for the total mass percentage of the nitrogen oxide gas adsorbent prepared in this example is 3%.

[0050] Embodiment 3 performance evaluation is carried out in U-shaped glass tube reactor, and reaction gas volume space velocity (GHSV) is 75000h ～1 , the...

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Abstract

The invention relates to a gas adsorbent of nitrogen oxides and a preparing method thereof in the technical field of air pollution. The gas adsorbent of the nitrogen oxides comprises active carbon, alkaline substances and metallic oxides. The preparing method comprises surface active modification, solution impregnation and metal load which are combined for preparing the gas adsorbent of the nitrogen oxides. The obtained adsorbent has high adsorption rate, large adsorption capacity and long penetration time to the nitrogen oxides, the preparation cost is lower than that of the prior art, and the preparation process is simple.

Description

technical field [0001] The invention relates to an adsorbent in the technical field of chemical industry and a preparation method thereof, in particular to a nitrogen oxide gas adsorbent and a preparation method thereof. Background technique [0002] Among various air pollutants, NO X pollution and the harm it causes cannot be ignored. Most of NOx comes from fuel combustion, that is, vehicle exhaust, industrial kiln emissions, etc. The main component of NOx is NO, which is slowly oxidized in the atmosphere into brown-red NO with a pungent odor 2 . NOx is the main pollutant that forms acid rain and acid mist, and can form photochemical smog with hydrocarbons, and also participates in the destruction of the ozone layer. Nitrogen oxides are harmful to the human body and mainly invade the bronchioles and alveoli in the deep part of the respiratory tract, which can strongly stimulate and corrode lung tissue and cause pulmonary edema. High concentrations of nitric oxide can a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/32B01D53/02
Inventor 张豪杰姚炜周莹周洁何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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