Calcium-promoted catalytic activity of potassium carbonate for steam gasification of coal char: Effect of hydrothermal pretreatment

被引：31
作者：
Jiang, Mingquan [1 ]
Hu, Jie [1 ]
Wang, Jie [1 ]
机构：
[1] E China Univ Sci & Technol, Dept Chem Engn Energy, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China
来源：
FUEL | 2013年 / 109卷
基金：
中国国家自然科学基金;
关键词：
Coal char; Catalytic gasification; Potassium carbonate; Calcium hydroxide; Hydrothermal treatment; MINERAL MATTER; FT-IR; ALKALI; HYDROGEN; OXYGEN; GAS;
D O I：
10.1016/j.fuel.2012.06.100
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：
Hydrothermal pretreatment of coal with the addition of Ca(OH)(2) was found more effective for promoting the K2CO3-catalyzed char gasification than the physical addition way for both JY anthracite coal and HB bituminous coal used. The effect of hydrothermal pretreatment was more remarkable for JY coal which suffers significant catalyst deactivation due to its high mineral content. For this type of coal, employing more severe hydrothermal pretreatment conditions was proven to significantly enhance the gasification rate. It was observed that kaolinite and quartz in coal hydrothermally reacted with calcium forming hydrated calcium aluminosilicates, which, unlike the original minerals, was inactive for the deactivation reactions of potassium. Consequently, the hydrothermal pretreatment allowed more potassium to persist as a water-soluble entity during the gasification. This was a main mechanism underlying the promoted catalytic gasification by the hydrothermal treatment. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：14 / 20
页数：7
相关论文
共 29 条
[1]   The characterization of activated carbons with oxygen and nitrogen surface groups [J].
Biniak, S ;
Szymanski, G ;
Siedlewski, J ;
Swiatkowski, A .
CARBON, 1997, 35 (12) :1799-1810
[2]   CORRELATION BETWEEN POTASSIUM LOSSES AND MINERAL MATTER COMPOSITION IN CATALYTIC COAL STEAM GASIFICATION [J].
BRUNO, G ;
CARVANI, L ;
PASSONI, G .
FUEL, 1986, 65 (10) :1473-1475
[3]   Unified mechanism of alkali and alkaline earth catalyzed gasification reactions of carbon by CO2 and H2O [J].
Chen, SG ;
Yang, RT .
ENERGY & FUELS, 1997, 11 (02) :421-427
[4]   Application of response surface methodology to assess the combined effect of operating variables on high-pressure coal gasification for H2-rich gas production [J].
Fermoso, J. ;
Gil, M. V. ;
Arias, B. ;
Plaza, M. G. ;
Pevida, C. ;
Pis, J. J. ;
Rubiera, F. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2010, 35 (03) :1191-1204
[5]   INTERACTION OF MINERAL MATTER IN COAL WITH POTASSIUM DURING GASIFICATION [J].
FORMELLA, K ;
LEONHARDT, P ;
SULIMMA, A ;
VANHEEK, KH ;
JUNTGEN, H .
FUEL, 1986, 65 (10) :1470-1472
[6]   RELATION BETWEEN THE GASIFICATION RATE OF CARBONS SUPPORTING ALKALI-METAL SALTS AND THE AMOUNT OF OXYGEN TRAPPED BY THE METAL [J].
HASHIMOTO, K ;
MIURA, K ;
XU, JJ ;
WATANABE, A ;
MASUKAMI, H .
FUEL, 1986, 65 (04) :489-494
[7]   Calcium-promoted catalytic activity of potassium carbonate for steam gasification of coal char: Influences of calcium species [J].
Jiang, Ming-Quan ;
Zhou, Rong ;
Hu, Jie ;
Wang, Fu-Chen ;
Wang, Jie .
FUEL, 2012, 99 :64-71
[8]   REACTION OF CATALYSTS WITH MINERAL MATTER DURING COAL-GASIFICATION [J].
KUHN, L ;
PLOGMANN, H .
FUEL, 1983, 62 (02) :205-208
[9]   Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part VII. Raman spectroscopic study on the changes in char structure during the catalytic gasification in air [J].
Li, Xiaojiang ;
Hayashi, Jun-ichiro ;
Li, Chun-Zhu .
FUEL, 2006, 85 (10-11) :1509-1517
[10]   STEAM GASIFICATION OF COAL CHAR USING ALKALI AND ALKALINE-EARTH METAL-CATALYSTS [J].
LIU, ZL ;
ZHU, HH .
FUEL, 1986, 65 (10) :1334-1338
123