MCM-48 supported chromium catalyst for trichloroethylene oxidation |
| |
Authors: | S Kawi M Te |
| |
Affiliation: | Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent Singapore 119260 Singapore |
| |
Abstract: | MCM-48 supported chromium (Cr/MCM-48) catalyst was prepared by introduction of chromium chloride during gel-preparation for the hydrothermal synthesis of MCM-48. Based on the N2 adsorption/desorption isotherm, BET, pore size distribution, XRD, FTIR, TGA, and DTA data, Cr/MCM-48 was found to have high surface area ( 832 m2/g), uniform pore size distribution ( 24 Å), mesoporous structures similar to MCM-48 itself, and incorporation of about 3 wt% of Cr component in the mesoporous framework. Cr/MCM-48 was very active for the oxidative destruction of trichloroethylene (TCE), which is a typical chlorinated volatile organic compound (CVOC); 100% conversion of TCE was achieved at 350°C. Based on the TGA of trichloroethylene/water adsorption study, it was found that MCM-48 had high adsorption capacity (>0.25 g TCE/g catalyst). In addition, the hydrophobicity of the adsorptive properties of Cr/MCM-48 materials could be modified. The high adsorption capacity and catalytic activity of Cr/MCM-48 material make it suitable for adsorption/catalysis bifunctional systems for energy-saving treatment of low concentration of VOC or CVOC. |
| |
Keywords: | MCM-48 Transition metal catalysts Chlorinated VOC (CVOC) Trichloroethylene (TCE) Surfactant template |
本文献已被 ScienceDirect 等数据库收录! |
|