Studies on the Adsorption Performance of K2CO3/γ-Al2O3 to SO2

Abstract

Abstract: The dispersion of K₂CO₃ on γ-Al₂O₃ and the adsorption performance of K₂CO₃/γ-Al₂O₃ to SO₂ are investigated.The results show that K₂CO₃ can disperse onto the surface of γ-Al₂O₃ as a monolayer and the dispersion threshold is 0.31[m(K₂CO₃)/m(γ-Al₂O₃), m/g], which is close to the theoretical value calculated by assuming a bidentate vertical dispersion model of CO₂ on the γ-Al₂O₃ surface. The SO₂ adsorption-capacity on K₂CO₃/γ-Al₂O₃ sample increases with the K₂CO₃ loading and reaches an extremum at its threshold. The adsorbent conversion of K₂CO₃/γ-Al₂O₃ at the threshold is up to 72%. When the loading is higher than the threshold, the SO₂ adsorption capacity decreases at first, then increases again. This phenomenon is caused by the reaction between SO₂ and the bulk phase of K₂CO₃ crystallites. The sample decreases with the loading, and the sample with 0.10[m(K₂CO₃)/m(γ-Al₂O₃), m/g] loading shows the highest regeneration percentage of 63%. Compared with Na₂CO₃/γ-Al₂O₃, K₂CO₃/γ-Al₂O₃ might have some advantages.

Key words: SO₂, Adsorption, K₂CO₃/γ-Al₂O₃, Regeneration, Monolayer dispersion

CLC Number:

O643

TrendMD:

JIANG De-En, ZHAO Bi-Ying, XIE You-Chang . Studies on the Adsorption Performance of K₂CO₃/γ-Al₂O₃ to SO₂[J]. Chem. J. Chinese Universities, 2001, 22(10): 1741.

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Studies on the Adsorption Performance of K₂CO₃/γ-Al₂O₃ to SO₂

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