Modification of CoMo/TiO2-Al2O3 catalyst by gas phase fluorination

作者：Ling L; Wang XX^*; Weng H; Yang Q; Fu XZ

来源：Acta Physico - Chimica Sinica, 2003, 19(1): 70-74.

DOI：10.3866/PKU.WHXB20030116

• hydrodesulfurization(HDS)
• freon
• gas phase fluorination
• CoMo/TiO2-Al2O3 catalyst

The effect of support pre-fluorination on the physical properties and catalytic activity of MoCo/ Al2O3-TiO2 was studied by XRD, N-2 adsorption, and thiophene hydrodesulfurization (HDS). Freon (CFC-12). in wet air or in NH4F solution was used as fluorinating reagents. The influence of CFC-12 content, effect of fluorination temperature and fluorinating time on the structure and hydrodesulfurization activity of the catalysts were examined systematically. The results revealed that hydrodesulfurization activity of the catalyst fluorinated by 1% CFC-12 at 623 K was obviously improved with an increase of 20% similar to 30% as compared with that of the unfluorinated catalyst, the commercially available BY2 catalyst, and NH4F-fluorinated catalysts. Moreover, the catalyst fluorinated by the Freon gas presented excellent stability on catalytic activity and structure.

• 出版日期2003-1
• 单位福州大学