| DU Chen-hao,CHEN Hang-ning.Preparation of Supported Cu-based Catalysts and Catalytic Purification of Acrylonitrile and HCN[J],48(11):252-258 |
| Preparation of Supported Cu-based Catalysts and Catalytic Purification of Acrylonitrile and HCN |
| Received:March 05, 2019 Revised:November 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.11.027 |
| KeyWord:Cu-based catalysts Supported exhaust gas purification surface modification HCN gas propane purification |
| Author | Institution |
| DU Chen-hao |
Shanghai Research Institute of Petrochemical Technology, Shanghai , China |
| CHEN Hang-ning |
Shanghai Research Institute of Petrochemical Technology, Shanghai , China |
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| Abstract: |
| The work aims to adjust the components in the impregnation solution of Cu-based catalysts, and investigate their influence on the purification efficiency of acrylonitrile (AN) and HCN. Through appropriate surface modification method, various catalysts were prepared by supporting different kinds and contents of additives on the surface of the commonly seen support (zeolite and oxide). The morphological and structural properties as well as the mechanical strength of the catalysts were characterized by X-ray Diffraction (XRD), Electron Microscope (EM), Energy Dispersive Spectrometer (EDS), surface area analysis and catalyst strength test methods. Moreover, the redox property and surface acidity of the catalysts were researched by H2-TPR and NH3-TPD method, respectively. Specifically, the Ce and Fe-modified catalyst showed excellent catalytic activity and stability in the purification of AN and HCN. Impregnated components were well distributed on the surface of the supports. Through ICP analysis, the support components of the catalyst contained 4.5%Cu+1.1%Ce+1.2%Fe (mass fraction). All catalysts obtained through the method exhibited high surface area, abundant pore structure with radial mechanical strength exceeding 100 N/cm. The acrylonitrile (AN) and HCN in the exhaust gas were converted into harmless CO2, H2O and N2 effectively after catalytic treatment and the concentrations of AN, HCN and NOx were below national standard (0.5 mg/m3, 1.9 mg/m3, 100 mg/m3, respectively). Moreover, no obvious deactivation was found after 2500 h of continuous reaction. The catalyst also demonstrated good hydrothermal stability and catalytic activity in C3H8 catalytic combustion reaction, with the C3H8 purification efficiency above 85% for 300 h at 450 ℃. A facile method has been developed to modify the surface of some commonly seen materials (zeolite and oxide) used in catalysis by adjusting the chemical properties of the supported components. The impregnation of active components endow the materials with effective purification properties of AN and HCN. The catalysts have excellent catalytic activity, stability and mechanical strength, which exhibits good prospects in industrial application. |
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