石油焦水蒸气气化过程孔隙结构和气化速率的变化
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摘要: 以氮气为吸附质，测定了部分气化石油焦的比表面积、孔容及其随孔径的分布，研究了石油焦的孔隙结构在气化过程中的变化及其对气化反应的影响。结果表明，石油焦的孔主要由微孔组成；水蒸气条件下气化时石油焦的比表面积、孔容随碳转化率增加而不断增大；不同孔隙率和比表面积的石油焦，其气化反应速率曲线变化趋势不同；石油焦的比气化反应速率与孔隙结构有着紧密的关系，比气化反应速率和有效比表面积之间有着较好的线性关系。Abstract: The specific surface area and pore volume of partially gasified petroleum cokes of different conversions are determined. Change of pore structure of partially gasified petroleum coke and its relationship with the gasification rate are investigated. The results show that pores of petroleum coke are mainly micropores. The specific surface area and pore volume increase with carbon conversion during steam gasification. Gasification rate plots changes differently for petroleum coke with different porosity and surface area. The reactivity has a close relationship with pore structure. There is a good linear relation between the specific gasification rate and the effective specific surface area.
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Key words:
- petroleum coke /
- gasification /
- pore structure
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