Preparation of activated carbon from Canadian coals using a fixed-bed reactor and a spouted bed-kiln system

被引:23
作者
Dalai, AK
Zaman, J
Hall, ES
Tollefson, EL
机构
[1] Akrilon Industries Inc., Calgary, Alta. T2E 7L9, 103
[2] Dept. of Chem. and Petrol. Eng., University of Calgary, Calgary, Alta. T2N 1N4, 2500 University Drive, N.W.
基金
加拿大自然科学与工程研究理事会;
关键词
activated carbon production; Canadian coals; reactor systems;
D O I
10.1016/0016-2361(95)00228-6
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
Several western Canadian coals (Bienfait lignite, Roselyn, Montgomery, Atlas-Century and Egg Lake subbituminous coals, and Coal Valley and Smoky River bituminous coals) were activated with steam to produce granular activated carbons. Activation times and temperatures were 0.5-4.0 h and 650-850 degrees C. The iodine number was used as a primary indicator of product quality. Activated carbons having iodine numbers of greater than or equal to 500 mg g(-1) carbon were produced from each coal except Smoky River. Bienfait lignite was found to be relatively reactive, the highest iodine number developed being 545 at a yield of 29 wt% and at 650 degrees C. Products from Montgomery and Atlas-Century coals showed iodine numbers of 620 and 579 at yields of 36 and 37 wt% respectively, at 700 degrees C. When activated at 650 degrees C for 3 h, Roselyn coal gave a product with an iodine number of 730. The products from Coal Valley coal, the least reactive, had an iodine numbers which increased from 370 on activation at 650 degrees C for 2 h to 571 on activation at 760 degrees C for 1.0 h, the product yield decreasing from 59 to 45 wt%. The high ash of the products, 23-67 wt%, limits their quality. The performances of fixed-bed and spouted bed-kiln reaction systems were compared by analyses of the properties of the products from Coal Valley coal. The fixed-bed system generally gave products with higher sorptive capacities under operating conditions which caused higher carbon burnoff.
引用
收藏
页码:227 / 237
页数:11
相关论文
共 19 条
[1]  
ANTHONY DB, 1975, 15TH S INT COMB PITT, P1303
[2]  
Bansal R.C., 1988, ACTIVE CARBON
[3]  
CHOWDHURY AI, 1988, 2835RG8528 U CALG DE
[4]   THE EFFECTS OF PRESSURE AND TEMPERATURE ON THE CATALYTIC-OXIDATION OF HYDROGEN-SULFIDE IN NATURAL-GAS AND REGENERATION OF THE CATALYST TO RECOVER THE SULFUR PRODUCED [J].
DALAI, AK ;
MAJUMDAR, A ;
CHOWDHURY, A ;
TOLLEFSON, EL .
CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1993, 71 (01) :75-82
[5]  
DERBYSHIRE FJ, 1991, AM CHEM SOC DIV FUEL, V36, P1072
[6]   LABORATORY GASIFICATION STUDY OF CANADIAN COALS .2. CHEMICAL-REACTIVITY AND COAL RANK [J].
FUNG, DPC ;
KIM, SD .
FUEL, 1983, 62 (11) :1337-1340
[7]   LABORATORY GASIFICATION OF 5 CANADIAN COALS [J].
FUNG, DPC .
FUEL, 1982, 61 (02) :139-144
[8]  
Gavalas G. R, 1982, COAL SCI TECHNOLOGY, V4
[9]  
HALL ES, 1987, 37TH P CSCHE C MONTR
[10]  
HASSLER JW, 1963, ACTIVATED CARBON, P330