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
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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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