Moisture transport during contact sorption drying of coal fines

被引：3
作者：
van Rensburg, M. J. [1 ]
Le Roux, M. [1 ]
Campbell, Q. P. [1 ]
Peters, E. S. [1 ]
机构：
[1] Northwest Univ, Sch Chem & Minerals Engn, Potchefstroom, South Africa
来源：
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION | 2020年 / 40卷 / 4-5期
基金：
新加坡国家研究基金会;
关键词：
Activated alumina; fine coal; dewatering; contact sorption drying; moisture transport;
D O I：
10.1080/19392699.2018.1543663
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Studies have shown that contact sorption drying is a feasible technique to dewater fine (+0.15mm-0.5mm) and ultra-fine (-0.15 mm) coal. The aim of this article is to further investigate the drying mechanism involved. It could be shown that moisture transfer occurred primarily in the liquid phase, requiring direct contact between the coal and sorbent particles to facilitate the movement of the water. Moisture transfer was enhanced by operating with a higher sorbent to coal mass ratio. When drying smaller coal particle size ranges, the resistance to liquid transport decreased, leading to better desorption results. These improvements were mainly as a result of a greater contact area between the sorbent and coal particles.
引用
收藏
页码：281 / 296
页数：16
相关论文
共 24 条
[1]  
Almatis, 2017, SMOOTH SPHER UN SIZ
[2]  
BASF, 2009, PROD DAT SHEET F 200
[3]  
Bhaskar R., 2014, ADSORPTION
[4]  
Bourgeois F. S., 1998, COAL PREP, V19, P9, DOI [10.1080/07349349808945571, DOI 10.1080/07349349808945571]
[5]  
Bratton R., 2012, CHALLENGES FINE COAL, P345
[6]  
Buckley A. N., 1995, CETIIR273 CSIRO
[7]  
Campbell Q. P., 2006, THESIS
[8]   Adsorption - from theory to practice [J].
Dabrowski, A .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 2001, 93 (1-3) :135-224
[9]  
De Korte G. J., 2004, 20040255 CSIR DIV MI
[10]  
Ducreux O., 2011, AIR GAS DRYING AXSOR
123