Preparation method of adsorbent capable of selectively adsorbing HF and HCl in SO2 smoke
A technology of selective adsorption and adsorbent, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of increasing operating costs of enterprises, increasing enterprise burden, consuming large energy, etc., achieving good adsorption effect, simple method, The effect of reducing emissions
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Embodiment 1
[0017] A selective adsorption of SO 2 The preparation method of HF and HCl adsorbent in flue gas specifically comprises the following steps:
[0018] (1) C-γ-Al 2 o 3 Preparation: Al(NO 3 ) 3 Solution, in the ratio of 2g / L in Al(NO 3 ) 3 The solution was added to CTAB to obtain solution A; the NH 4 HCO 3 Dissolved in the mixed solution of CTAB and PEG to prepare solution B, NH in solution B 4 HCO 3 The concentration of CTAB is 0.5g / L, the concentration of CTAB is 2g / L, and the concentration of PEG is 0.5g / L; under vigorous stirring, slowly add solution B to solution A at a volume ratio of 1:1, and use nitric acid Adjust the pH value to 3.0, and continue to stir for 1 hour to obtain a wet gel; after aging the wet gel at room temperature for 54 hours, wash it with absolute ethanol, and dry it at 40°C. 2 C-γ-Al was obtained after calcination under atmosphere for 5 h 2 o 3 .
[0019] (2) Preparation of Ca@γ-Al by equal volume impregnation method 2 o 3 The specific s...
Embodiment 2
[0022] A selective adsorption of SO 2 The preparation method of HF and HCl adsorbent in flue gas specifically comprises the following steps:
[0023] (1) C-γ-Al 2 o 3 Preparation: Al(NO 3 ) 3 Solution, in the ratio of 1.5g / L in Al(NO 3 ) 3 The solution was added to P123 to obtain solution A; the NH 4 HCO 3 Dissolve in P123 and PVP mixed solution to prepare solution B, in solution B, NH 4 HCO 3 The concentration of P123 is 1g / L, the concentration of P123 is 1.5g / L, and the concentration of PVP is 1g / L; under vigorous stirring, slowly add solution B to solution A at a ratio of 1:1 by volume, and adjust with nitric acid The pH value reached 5, and the wet gel was obtained after continuing to stir for 1.5h; the wet gel was aged at room temperature for 40h, washed with absolute ethanol, and dried at 60°C, and the obtained dry gel was dried at 550°C, N 2 C-γ-Al was obtained after calcination under atmosphere for 3 h 2 o 3 .
[0024] (2) Preparation of Ca@γ-Al by equal vol...
Embodiment 3
[0027] A selective adsorption of SO 2 The preparation method of HF and HCl adsorbent in flue gas specifically comprises the following steps:
[0028] (1) C-γ-Al 2 o 3 Preparation: Al(NO 3 ) 3 Solution, in the ratio of 1g / L in Al(NO 3 ) 3 The solution was added to CTAB to obtain solution A; the NH 4 HCO 3 Dissolve in CTAB and polyvinyl alcohol mixed solution to prepare solution B, in solution B, NH 4 HCO 3 The concentration of CTAB is 1.5g / L, the concentration of CTAB is 2g / L, and the concentration of polyvinyl alcohol is 2g / L; under vigorous stirring, slowly add solution B to solution A in a volume ratio of 1:1, and use Adjust the pH value to 6.0 with nitric acid, and continue to stir for 2 hours to obtain a wet gel; the wet gel is aged at room temperature for 45 hours, washed with absolute ethanol, and dried at 70 ° C. 2 C-γ-Al was obtained after calcination under atmosphere for 2 h 2 o 3 .
[0029] (2) Preparation of Mg@γ-Al by equal volume impregnation method ...
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