Research on the Impact of Modification Method on 13X Zeolite Molecular Sieve Adsorption Performance for SO2

Abstract The article takes 13X molecular sieve as the object, studies the effects of three modification methods, including calcination temperature, NaOH solution concentration, and CuO and MnO 2 loading, on the adsorption performance of SO 2 on 13X molecular sieve, and preliminarily explores the adsorption kinetics characteristics of 13X‐xwt % MnO 2 . The results show that the modification method of loading 13X‐6wt %MnO 2 is better, the penetration adsorption time is about 130 minutes, and the maximum penetrable adsorption capacity is 57.8 mg⋅g ‐1 .The adsorption kinetics study of 13X‐6wt % MnO 2 shows that the R 2 of the quasi‐second‐order model is close to 0.99, indicating that the adsorption process follows the quasi‐second‐order kinetic equation. The particle diffusion kinetic model fitting shows that the adsorption process is divided into two stages, the first stage is rapid adsorption, which is mainly controlled by surface adsorption and intraparticle diffusion rate, while the second stage is mainly microporous or chemisorption, with a smaller adsorption amount.