Citation: ZHANG Ke-yi, CHEN Xue-li, MENG De-xi, GUO Xiao-lei, GONG Xin. Effect of adding coal ashes and oxide mixtures on CO₂ gasification reactivity of petcoke at high temperature[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(3): 257-264. shu

Effect of adding coal ashes and oxide mixtures on CO₂ gasification reactivity of petcoke at high temperature

Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China

Corresponding author: CHEN Xue-li, cxl@ecust.edu.cn
Received Date: 13 September 2017
Revised Date: 21 December 2017

Fund Project: The project was supported by the Fundamental Research Funds for the Central University (222201718003)the Fundamental Research Funds for the Central University 222201718003

Figures(9)

Three additives (combustion coal ash, coal gasification ash and oxide mixture) with similar chemical composition were added into petcoke by dry mixing and wet mixing. Their gasification reactivities under CO₂ atmosphere were investigated by a Thermo gravimetric Analyzer (TGA) at 1200-1400℃.The influence of mixing method, coal ash content and phase components on petcoke catalytic gasification was studied. The oxide mixture was used to simulate the catalytic effect of actual coal ash at high temperature. The results indicate that gasification reaction rate of petroleum coke is accelerated with increasing amount of coal ash. Dry mixing and gasification coal ash has less obvious effects on catalytic activity at 1200 and 1300℃. But the mixing method and mode of active metal has little influence on gasification reaction of petcoke at 1400℃. It is because the molten ash keeps good contact with petcoke, which makes reactive metals more freely and enhances mass transfer resistance. The catalytic index of the oxide mixtures has linear relationship with content of Fe₂O₃ and CaO during petcoke gasification at high temperature. This means coal ashes with high content of Fe and Ca could accelerate CO₂ gasification reactivity of petcoke.
- petcoke,
- coal ash,
- CO₂ gasification at high temperature,
- catalytic index
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Effect of adding coal ashes and oxide mixtures on CO₂ gasification reactivity of petcoke at high temperature