石油焦水蒸气催化气化反应特性

Characteristic of Petroleum Coke Catalytic Gasification With Steam

采用金属硝酸盐为催化剂,研究石油焦与水蒸气催化气化反应特性。考察了NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2、Fe(NO3)3对石油焦水蒸气气化反应的催化效果,在消除内外扩散影响的前提下,探讨了温度、压力和O2量对石油焦水蒸气催化气化反应特性的影响。结果表明,催化剂的加入可明显提高气化反应速率,对石油焦水蒸气气化反应的催化活性从大到小的催化剂顺序为NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2、Fe(NO3)3;随着反应温度和压力的升高,石油焦水蒸气气化反应速率均呈现增加的趋势,催化气化比非催化气化初始反应温度降低约200℃;石油焦与水蒸气-O2的共气化反应中,O2会与生成的H2和CO等气体反应,影响合成气组成。

The cata petroleum coke gas lytic effects of NaNOa, KNO3, Ca（NO3）2, Mg（NO3）2 and Fe（NO3）a in ification reaction with steam were investigated. On the premise of eliminating the influences of internal and external diffusion, effects of temperature, pressure and oxygen dosage on the characteristics of petroleum coke steam catalytic gasification were studied. The results showed that the addition of the catalyst could obviously enhance the gasification reaction rate, and catalytic activity of the catalysts NaNO3, KNOa, Ca （NO3）2, Mg （NO3）2, Fe （NO3） a for petroleum coke gasification reaction decreased successively. The petroleum coke gasification reaction rate had an increasing trend with the increasing reaction temperature and pressure. The initial reaction temperature of the catalytic gasification was reduced about 200℃ compared to non-catalytic gasification. The oxygen reacted with H2 and CO in the co-gasification of petroleum coke with steam and oxygen, which effected the composition of synthesis gas.