Abstract：Using silica, an alkali source, and an organic structure-directing agent as starting materials, a binder-free high-silica beta zeolite adsorbent was synthesized via a dry-gel conversion route. The effects of synthesis parameters on the product structure were systematically investigated to minimize preparation costs. A 100 kg-scale pilot synthesis was subsequently conducted, and the adsorption performance of the resulting materials was evaluated. High-silica beta zeolite with SiO2/Al2O3 molar ratios exceeding 200 were successfully obtained at TEA+/SiO2 molar ratios of 0.15-0.21 and precursor water contents of 4.6%-14.4% by mass. Upon introducing 5% by mass seed crystals (based on SiO2) at a TEA+/SiO2 ratio of 0.16, the product exhibited a specific surface area as high as 682.3 m2/g. Optimization of the post-crystallization treatment further increased the mechanical strength to 69 N/cm. Under the optimized conditions, the synthesis was successfully scaled up to 100 kg. The scaled-up adsorbent showed a cyclohexane vapor adsorption capacity of 30.91% by mass, outperforming several conventional zeolite adsorbents. These results demonstrate the feasibility of cost-effective, large-scale production of binder-free, high-silica beta zeolite adsorbents and highlight their potential for industrial adsorption of volatile organic compounds.
SHANG Chengcheng,WANG Deju,CONG Wenjie et al. Preparation and Adsorption Properties of Binder-Free High-Silica Beta Zeolite[J]. Chemical Reaction Engineering and Technology, 2026, 42(3): 219-224.
