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| Pore structure development of coke during carbon solution loss reaction |
| WANG Jie-ping，XIE Quan-an，SUN Zhang，JI Bin，LIANG Ying-hua |
| （College of Chemical Engineering， North China University of Science and Technology，Tangshan 063009， Hebei， China） |
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Abstract The carbon solution loss reaction at different temperatures was studied by coke reactivity equipment. The pore structure parameters of coke were characterized by specific surface area and pore size analyzer and SEM analyzer. The specific surface area， pore volume and average pore size of coke were calculated by BET equation and BJH method， then the variation of fractal characteristics were calculated by adsorption isotherms. Changes of coke pore structure in the carbon solution loss reaction were investigated. The results showed that the curve symptom of coke changes from type I to type II adsorption isotherm， the specific surface area and pore volume increased initially and then decreased， and the pore diameter range of 2-10 nm varied apparently with temperature increasing. Carbon solution loss reaction of coke was mainly affected by the chemical reaction rate at temperature lower than 1 000 ℃， while it was dominated by coke diffusion control at higher than 1 000 ℃， which was affected by pore structure of different cokes. There would be a certain correlation between fractal dimension results and pore structure， which could reflect the pore development of coke in the solution loss reaction.
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Received: 06 February 2015
Published: 29 October 2015
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2015, Vol. 50 
