Kinetic study on Low-rank Coal Including K2CO3, Na2CO3, CaCO3 and Dolomite Gasification under CO2 Atmosphere 


Vol. 20,  No. 1, pp. 64-71, Mar.  2014


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  Abstract

We have investigated the effects of various additives on Eco coal gasification under CO2 atmosphere. The temperature ranges from 750~900 ℃ and the gasification experimental was carried out with Eco coal adding 7 wt% K2CO3, Na2CO3, CaCO3, Dolomite, and non-additive under N2 and CO2 gas mixture. At 850 ℃, we observed that the reaction rate increased when the concentration of CO2 increased. However, we also observed that the increment of reaction rate was small at more than 70% of the concentration of CO2. The additives activity was ranked as 7 wt% Na2CO3 > 7 wt% K2CO3 > non-additive > 7 wt% Dolomite > 7 wt% CaCO3 at 850 ℃. At the temperatures of 750 ℃, 800 ℃, 850 ℃, and 900 ℃, when the temperature increased, the gasification rate increased. The gasification was suitably described by the volumetric reaction model. Using volumetric reaction model, the activation energy of Eco coal including 7 wt% Na2CO3 gasification was 83 kJ/mol, which was the lowest value among all the alkaline additives.

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  Cite this article

[IEEE Style]

H. SC, K. SK, P. JY, L. DK, L. SH, R. YW, "Kinetic study on Low-rank Coal Including K2CO3, Na2CO3, CaCO3 and Dolomite Gasification under CO2 Atmosphere," Clean Technology, vol. 20, no. 1, pp. 64-71, 2014. DOI: .

[ACM Style]

Hwang SC, Kim SK, Park JY, Lee DK, Lee SH, and Rhee YW. 2014. Kinetic study on Low-rank Coal Including K2CO3, Na2CO3, CaCO3 and Dolomite Gasification under CO2 Atmosphere. Clean Technology, 20, 1, (2014), 64-71. DOI: .

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

한국연구재단 등재학술지