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利用固定床反应装置研究了催化剂Co/活性炭(AC)中引入助剂Mg O对甲烷二氧化碳重整制合成气催化剂性能的影响,并通过XRD、SEM和BET技术对催化剂进行了表征。结果表明,添加适量的助剂Mg O一方面与活性物质发生协同作用,提高催化剂的比表面积;另一方面可以调节催化剂的酸碱性,提高催化剂对CO2的吸附活化,从而促进甲烷的裂解脱氢。400℃焙烧条件下制备的催化剂Co-Mg O/AC表现出最佳的催化活性和稳定性,在900℃下连续运行1 200 min,甲烷和二氧化碳转化率分别维持在96.7%和97.0%左右。
The effect of introducing MgO on catalyst Co / activated carbon (AC) on the performance of the catalyst for the reforming of methane to carbon dioxide into syngas was investigated by a fixed bed reactor. The catalysts were characterized by XRD, SEM and BET. The results showed that adding proper amount of MgO could synergize with the active material and increase the specific surface area of the catalyst. On the other hand, MgO could adjust the acidity and basicity of the catalyst and enhance the adsorption and activation of CO2 to the catalyst, hydrogen. The catalyst Co-Mg O / AC prepared at 400 ℃ exhibited the best catalytic activity and stability. The continuous operation at 900 ℃ for 1 200 min resulted in the methane and carbon dioxide conversions of 96.7% and 97.0%, respectively.