Amelioration of catalytic activity in steam catalytic cracking of vacuum residue with ZrO2-impregnated macro-mesoporous red mud

作者：Chinh Nguyen Huy; Shin Eun Woo^*

来源：Fuel, 2016, 179: 17-24.

DOI：10.1016/j.fuel.2016.03.062

• Macro-mesoporosity
• Red mud
• ZrO2
• Vacuum residue
• Steam
• Catalytic cracking

ZrO2-impregnated macro-mesoporous red mud catalysts were successfully prepared for the catalytic cracking of vacuum residue (VR) in a steam atmosphere under a fixed-bed reaction condition at 500 degrees C for 2 h. Zirconia was homogeneously dispersed in the macro-mesoporous red mud, and the resulting catalyst had a high surface area, large pore volume, and highly ordered pore structure dimensions. When compared to a ZrO2-impregnated mesoporous red mud, the ZrO2-impregnated macro-mesoporous red mud catalysts exhibited better catalytic behavior for the steam catalytic cracking of VR. The presence of a macroporous structure ameliorated the catalytic activity due to improved accessibility to active hydrogenation sites and oxidative cracking, which in turn induced higher conversion values, a greater liquid yield, and a higher H/C ratio in the liquid product when compared to a ZrO2-impregnated mesoporous red mud catalyst. Furthermore, the ZrO2-impregnated macro-mesoporous red mud catalyst showed better regenerability due to both a large pore volume and the good stability of the pore structure.

• 出版日期2016-9-1