| Autor: |
Xiaofang Tan, Junhao Mao, Guoqing Ren, Yu Chang, Lijuan Jia, Tiancheng Liu |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Crystals, Vol 12, Iss 7, p 935 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2073-4352 |
| DOI: |
10.3390/cryst12070935 |
| Popis: |
Chlorodifluoromethane (HCFC-22) is one of the air pollutants that destroy the ozone layer and warm the earth. In order to degrade HCFC-22, the catalytic hydrolysis method is currently the most effective environmental technology. Herein, we prepare solid acid MoO3/ZrO2 and solid base MgO/ZrO2 catalysts for the degradation of HCFC-22, with a particular focus on revealing the effects of the catalyst preparation methods, calcination temperatures, and hydrolysis temperatures on the hydrolyzation and hydrolysis rates of HCFC-22. The catalysts are characterized by XRD, N2 isothermal adsorption–desorption, and NH3-TPD. The results show that the solid acid (base) MoO3(MgO)/ZrO2 catalysts have strong catalytic activity for the degradation of HCFC-22, while the catalytic activity of the solid acid MoZr is better than that of the solid base MgZr catalyst and the hydrolysis rate can reach more than 90%. The water vapor generates B-acid centers on the MoO3(MgO)/ZrO2 framework and promotes the hydrolysis of HCFC-22 to HF and HCl. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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