Effects of process parameters on pore structure of semi-coke prepared by solid heat carrier with dry distillation  

作　　者：Zhou, Guoli  Wu, Jianjun  Miao, Zhenyong  Hu, Xuelian  Li, Xia  Shi, Xin  Cai, Zhidan  Shang, Yukun 

机构地区：[1]Chinese National Engineering Research Center of Coal Preparation and Purification, Xuzhou 221116, China [2]School of Chemical Engineering (ε) Technology, China University of Mining (ε) Technology, Xuzhou 221116, China

出　　处：《International Journal of Mining Science and Technology》2013年第3期423-427,共5页矿业科学技术学报（英文版）

基　　金：financial support from the Major State Basic Research Development Program of China (No. 2012CB214902);the National Natural Science Foundation of China (No. 51104159) are greatly appreciated

摘　　要：The semi-coke was prepared by solid heat carrier with dry distillation in single factor method. The pore structures of raw coal and semi-coke were characterized by Brunauer-Emmett-Teller (BET) and scanning electron microscope (SEM). The results show that the adsorption and desorption isotherm of semi-coke are not coincident. There was a wide pore distribution on the semi-coke, in which mesopores and micropores account for a considerable proportion. Also there are many more secondary pores. With the increase of the final temperature of heat carrier and constant temperature, as well as the decrease of volume ratio of coal and hot carrier reactor, specific surface area and pore volume of semi-coke increased rapidly first and then decreased and finally increased, along with the rapidly reduction of average pore size. SEM photos show that the surface of semi-coke becomes increasingly rough and glossy.The semi-coke was prepared by solid heat carrier with dry distillation in single factor method. The pore structures of raw coal and semi-coke were characterized by Brunauer-Emmett-Teller (BET) and scanning electron microscope (SEM). The results show that the adsorption and desorption isotherm of semi-coke are not coincident. There was a wide pore distribution on the semi-coke, in which mesopores and micropores account for a considerable proportion. Also there are many more secondary pores. With the increase of the final temperature of heat carrier and constant temperature, as well as the decrease of volume ratio of coal and hot carrier reactor, specific surface area and pore volume of semi-coke increased rapidly first and then decreased and finally increased, along with the rapidly reduction of average pore size. SEM photos show that the surface of semi-coke becomes increasingly rough and glossy.

关 键 词：Semi-coke Pore structure Heat carrier dry distillation BET SEM 

分 类 号：TQ520.1[化学工程—煤化学工程]