Transformation behavior of trace elements during coal pyrolysis

被引：34

作者：

Guo, RX ^{[1
]}

Yang, JL ^{[1
]}

Liu, DY ^{[1
]}

Liu, ZY ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

来源：

FUEL PROCESSING TECHNOLOGY | 2002年 / 77卷

基金：

中国国家自然科学基金;

关键词：

coal; trace elements; pyrolysis; transformation behavior;

D O I：

10.1016/S0378-3820(02)00041-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Transformation behavior of trace elements during pyrolysis of three Chinese coals at temperatures up to 1000 degreesC was studied. Effects of temperature, atmosphere (N-2 and H-2), and coal type on release of As, Pb, Cr, Cd and Mn were examined. Experiments were carried out in a fixed bed quartz reactor with a heating rate of 20 degreesC/min. Results show that bleeding ratios of As, Pb, Cr, Cd and Mn increase with increasing pyrolysis temperature, H, atmosphere promotes the release of these elements, Among the trace elements studied, Pb is the most volatile element; Cr and Mn are relatively non-volatile. However, the volatility of these elements varies with coal type. This suggests that these elements are present in various compounds in the coals and the distribution of the element in the compounds is different. Distribution of the forms for these elements in Yima coal and char was analyzed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：137 / 143

页数：7

共 8 条

[1] CHEMICAL STUDIES OF STACK FLY-ASH FROM A COAL-FIRED POWER-PLANT [J].