Influence of temperature on pyrolysis properties of low rank coal
SHANG Tiecheng
Abstract：In order to get high quality and yield coal tar,taking Yulin long flame coal as research object,the paper investigated the products yield,char strength and coal tar properties under different prolysis temperature using 1 kg/ h external heated rotary furnace.The results showed that,the rising temperature aggravated the pyrolysis,the gas and liquid products yield increased,the char yield decreased.With the rise of temperature,the yield of water yield increased slightly,the char structural strength and aperture also raised.The higher the tempera-ture,the better-developed pore structure.The aliphatic and aromatic content were proportional to the temperature,while the polar composi-tion was inversely proportional to the temperature.The optimum prolysis temperature was 600 ℃ for long flame coal,the maximum coal tar yield was 8.66%,which was 79.5% of Gray-King yield.The semi-coke strength was greater than 78% when the polar composition was 32. 9% and the aliphatic and aromatic content was more than 50%.
Keywords：low rank coalpyrolysis temperaturecoal targroup compositionstructural strengthexternal heated rotary furnace
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 28-31 )