论文部分内容阅读
在热重上进行石油焦原样及浸渍催化剂样品的水蒸气气化试验.结果表明碱金属(K)对石油焦水蒸气气化具有很强的催化作用,能够大幅降低石油焦水蒸气气化反应的起始反应温度和最大反应速率对应的温度,同时其气化速率明显增大.Raman分析发现石油焦原样随着气化反应的进行,石油焦的石墨化程度明显增加,碳结构变得更加有序,使得气化更难;而添加了K_2CO_3后,石油焦的石墨化程度随气化反应的进行变化很小;且与原样相比,K_2CO_3的加入还能够增加石油焦的小芳香环结构和桥键结构,从而增加气化反应速率.
The steam-gasification experiments of petroleum coke-like and impregnated catalyst samples were carried out on thermogravimetric method.The results show that alkali metal (K) has a strong catalytic effect on steam gasification of petroleum coke and can greatly reduce the steam gasification reaction of petroleum coke Of the initial reaction temperature and the maximum reaction rate corresponding to the temperature, while its gasification rate increased significantly.Raman analysis found that the petroleum coke as the gasification reaction with the progress of the petroleum coke significantly increased the degree of graphitization, the carbon structure becomes more Order, making gasification more difficult; and K_2CO_3 added, the degree of graphitization of petroleum coke changes little with the gasification reaction; and compared with the original, K_2CO_3 addition can also increase the small aromatic ring structure of petroleum coke And bridge structure, thereby increasing the gasification reaction rate.