Preparation of Functionalized Silicalite-1@ATP and Investigation of Its Acetaldehyde Adsorption Properties
GAO Bingying1, LU Qiyi1, WU Fengqin1, ZUO Shixiang2, LI Xiazhang1, YAO Chao1
1. School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;
2. Xuyi Bump R&D Center, Changzhou University, Xuyi 211700, China
Abstract：Volatile organic compounds (VOCs) are increasingly produced in chemical enterprises, machinery manufacturing, and many other industries. The gas processing environment is complex and stringent because the exhaust gas often contains large amounts of water vapor. Attapulgite is an excellent inorganic adsorption material. However, due to the numerous hydroxyl groups on its surface, VOCs are prone to compete with water molecules for adsorption, resulting in poor performance in high-humidity dynamic environments. To enhance the hydrophobicity and adsorption for acetaldehyde of materials under high humidity environment, Silicalite-1 molecular sieve was loaded onto attapulgite using both the direct method and the seed-mediated method, followed by amino functionalization modification. The results indicated that the seed-mediated method facilitated more uniform loading of Silicalite-1 onto attapulgite compared to the direct method. Further modification through amino grafting with silane KH-550 improved the material's hydrophobicity. The amino-modified composite (N/S-1@ATP) exhibited an optimal static adsorption capacity of 231 mg/g. Under 0% relative humidity (RH), the dynamic breakthrough time was 66 minutes, with a breakthrough adsorption capacity of 11.84 mg/g. At 80% RH, the dynamic breakthrough time decreased to 19 minutes, and the breakthrough adsorption capacity was 3.13 mg/g. Due to the strong adsorption effect of N/S-1@ATP on acetaldehyde in both dry and water vapor environments, this study provides a research basis for VOCs adsorption in high-humidity, high-velocity dynamic environments.
GAO Bingying,LU Qiyi,WU Fengqin et al. Preparation of Functionalized Silicalite-1@ATP and Investigation of Its Acetaldehyde Adsorption Properties[J]. Chemical Reaction Engineering and Technology, 2025, 41(4): 475-483.
