石油焦水蒸气气化反应特性
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摘要: 在常压，900 ℃～1 050 ℃，20％～100％水蒸气分压范围内，在热天平上研究了两种石油焦的气化反应特性。实验表明，在水蒸气气氛下石油焦具有较好的气化反应活性，气化过程中反应速率R＝dx/dt在转化率0.2附近有一最大值，而比气化反应速率M=dx/dt/(1-x)则处于单调递增状态。通过对石油焦气化过程中有效比表面积随碳转化率变化的实验表明，以实际碳基为基准的有效比表面积Se随反应的进行不断增大，M和Se的变化趋势相同。Abstract: The effect of temperature and steam partial pressure on gasification characteristics was investigated using thermobanlace. The results showed that the gasification reactivity of petroleum cokes is high. The reaction rate, R＝dx/dt, has a maximum value when carbon conversion is about 0.2 as the reaction proceeds. The carbon conversion corresponding to the maximum reaction rate is independent of temperature and steam partial pressure. And the specific gasification rate, M=dx/dt/(1-x), increases continuously during the gasification of petroleum cokes. It has a linear relationship with carbon conversion during the carbon conversion from xmax to 0.8. The specific surface area increases with increasing carbon conversion. The specific gasification rate has a good relativity with the effective specific surface area occupied by pores larger than 0.6 nm.
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Key words:
- petroleum coke /
- gasification /
- reaction rate /
- specific rate
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