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.
收稿日期: 2015-02-06
出版日期: 2015-10-29
引用本文:
王杰平,谢全安,孙 章,季 斌,梁英华. 碳溶反应过程焦炭气孔结构变化规律[J]. 钢铁, 2015, 50(11): 8-13.
WANG Jie-ping,XIE Quan-an,SUN Zhang,JI Bin,LIANG Ying-hua. Pore structure development of coke during carbon solution loss reaction. Iron and Steel, 2015, 50(11): 8-13.
Wei Huo, Zhijie Zhou, Fuchen Wang, etal.Mechanism analysis and experimental verification of pore diffusion on coke and coal char gasfication with CO2[J]. Chemical Engineering Journal. 2014, 244 :227-233.
[5]
Wei Huo, Zhijie Zhou, Fuchen Wang, etal.Mechanism analysis and experimental verification of pore diffusion on coke and coal char gasfication with CO2[J]. Chemical Engineering Journal. 2014, 244 :227-233.
[6]
Pusz S, Krzesińska M, Sm?dowski ?, et al.Changes in a coke structure due to reaction with carbon dioxide[J].International Journal of Coal Geology, 2010, 81(4):287-292
[6]
Pusz S, Krzesińska M, Sm?dowski ?, et al.Changes in a coke structure due to reaction with carbon dioxide[J].International Journal of Coal Geology, 2010, 81(4):287-292
[7]
Kashiwaya Y, Takahata M, Ishii K, et al.Change of coke structure and behavior of fine generation during gasification of coke sphere in high temperature region[J].Tetsu to Hagane-Journal of the Iron and Steel Institute of Japan, 2001, 87(5):259-266
[7]
Kashiwaya Y, Takahata M, Ishii K, et al.Change of coke structure and behavior of fine generation during gasification of coke sphere in high temperature region[J].Tetsu to Hagane-Journal of the Iron and Steel Institute of Japan, 2001, 87(5):259-266
[8]
Mhlwazi S.Nyathi, Maria Mastalerz, Richard Kruse. Influence of coke particle size on pore structural determination by optical microscopy[J].International Journal of Coal Geology, 2013, 118: 8-14.
[8]
Mhlwazi S.Nyathi, Maria Mastalerz, Richard Kruse. Influence of coke particle size on pore structural determination by optical microscopy[J].International Journal of Coal Geology, 2013, 118: 8-14.