高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 381.
• Chemistry in Surface Science • 上一篇 下一篇
LUO Chun-Rong1, YAN Qian-Gu1, WENG Wei-Zheng1, WU Ting-Hua2, WAN Hui-Lin1
LUO Chun-Rong1, YAN Qian-Gu1, WENG Wei-Zheng1, WU Ting-Hua2, WAN Hui-Lin1
摘要:
Ni/TiO2 catalyst was firstly used for the partial oxidation of methane to produce synthesis gas. The reaction was carried out in a fixed-bed continuous flow quartz reactor at atmospheric pressure. The flow rate was regulated by a mass controller with a space velocity of 1.5×105 h-1 and a CH4/O2 molar ratio of 2/1. Prior to the introduction of feed gas, the Ni/TiO2 catalyst was activated in flowing H2 at 700℃ for 30 min. TiO2 is known to be a poor support for partial oxidation because which can easily result in complete oxidation. But at 700℃, Ni/TiO2 catalyst exhibited a better performance than Ni/SiO2 and Ni/ZrO2. The conversion of methane was 81.5, and the selectivity of hydrogen and carbon monoxide were 93.4 and 89.4 respectively. After 6h of continuous reaction, the conversion of methane descended a little and then remained a steady yield on the whole,but the selectivity of H2 and CO gradually declined, as far as to a constant. The selectivity of H2 was always higher than that of CO and the ratio of H2/CO wouldn't change with the increasing of reaction time.
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