Adsorption Behavior of Toluene on Modified 1X Molecular Sieves

作者：Yu, Yunfeng; Zheng, Liangwei; Wang, Jiade^*

来源：Journal of the Air and Waste Management Association, 2012, 62(10): 1227-1232.

DOI：10.1080/10962247.2012.702186

• VOLATILE ORGANIC-COMPOUNDS
• PORE STRUCTURE
• VOC REMOVAL
• DESORPTION
• ZEOLITES

In this paper, the toluene adsorption/desorption properties of modified 13X molecular sieves (M-13X) are discussed. M-13X molecular sieves were prepared by acidic and steam treatments of 13X molecular sieves. The structural parameters of M-13X were evaluated and compared with those of other molecular sieves (HY, HZSM-5, Cs7NaMOR, and a commercial 13X). The results show that the specific surface area, average pore diameter, and pore volume of M-13X were 414.17 m(2)/g, 2.98 nm, and 0.31 mL/g, respectively. The pore size distribution of M-13X was 1.8-3.0 nm. Because of its larger Si/Al ratio (Si/Al 6.77), the hydrophobicity of M-13X is much higher than that of 13X (Si/Al 1.28), indicating that it is particularly well suited to toluene control applications. The saturation adsorption capacity of M-13X was 0.045 g/g for simulated toluene at a temperature of 293 K and a relative humidity of 50%. The optimal regeneration temperature of M-13X was 473 K for 120 min with a hot air flow rate of 140 L/min.

• 出版日期2012
• 单位浙江工业大学