Influence of Pyrolysis Temperature on the Gaseous Products of Lignite

Abstract:

Temperature-programmed pyrolysis of SL-lignite from Xilinhaote was investigated. The solid and gaseous pyrolysates were analyzed by means of gas chromatography(GC) and X-ray diffraction(XRD). The weight percents of surface moisture, ash, C, H and S increase with increasing the pyrolysis temperature in solid pyrolysates, while the volatile matter is contrary. The cracking reaction occurs before 600°C, the consolidation reaction happens between 600°C and 650°C, while the polycondensation or secondary reaction appears after 650°C. Calcium sulfide is formed by the process of decomposition of calcium sulphates at 900°C. The solid pyrolysates become more graphitic with increasing the pyrolysis temperature.

• Periodical: Advanced Materials Research (Volumes 524-527)
• Pages: 883-886
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.524-527.883
• Online since: May 2012
• Authors: Chen Liang Zhou, Quan Sheng Liu, Yang Li, Ying Yue Teng, Ke Duan Zhi, Yin Min Song, Run Xia He
• Keywords: Lignite, Pyrolysis Gases, Pyrolysis Temperature

References

[1] Taro Sonobe, Nakorn Worasuwannarak, Suneerat Pipatmanomai. Synergies in CO-pyrolysis of Thai lignite and corncob. Fuel Processing Technology, 89(2008), 1371-1378.

DOI: 10.1016/j.fuproc.2008.06.006

[2] Gaye O¨ . C¸ akal, Hayrettin Yu¨cel *, A. Gu¨niz Gu¨ru¨z. Physical and chemical properties of selected Turkish lignites and their pyrolysis and gasification rates determined by thermogravimetric analysis. Journal of analytical and applied pyrolysis.80(2007), 262-268.

DOI: 10.1016/j.jaap.2007.03.005

[3] Wei Tao, Yan-Rong Zou, Andy Carr, etc. Study of the influence of pressure on enhanced gaseous hydrocarbon yield under high pressure-high temperature coal pyrolysis. Fuel. 89(2010), 3590-3597.

DOI: 10.1016/j.fuel.2010.06.007

[4] Nansheng Qiu, Huili Li, Zhijun Jin, et al. Temperature and time effect on the concentrations of free radicals in coal: Evidence from laboratory pyrolysis experiments. Coal Geology, 69(2007), 220-228.

DOI: 10.1016/j.coal.2006.04.002

[5] Tauqeer Ahmad, Iftikhar A. Awan, Jan Nisar et al. Influence of inherent minerals and pyrolysis temperature on the yield of pyrolysates of some Pakistani coals. Energy Conversion and Management, 50(2009), 1163-1171.

DOI: 10.1016/j.enconman.2009.01.031

[6] Guoxin Hu, Haojie Fan, Yaqin Liu. Experimental studies on pyrolysis of Datong coal with solid heat carrier in a fixed bed. Fuel Processing Technology, 69(2001), 221-228. Buserite

DOI: 10.1016/s0378-3820(00)00144-2

[7] Richard Sakurovs, Steve Lavrencic. Contact angles in CO2-water-coal systems at elevated pressures. International Journal of Coal Geology, 87(2011), 26-32.

DOI: 10.1016/j.coal.2011.04.005

[8] Xiaoliang Wang, Rong He, Yongli Chen. Evolution of porous fractal properties during coal devolatilization. Fuel, 87(2008), 878-884.

DOI: 10.1016/j.fuel.2007.05.038

[9] Davut Uzun, Sibel O¨ zdog˘an. The behavior of sulphur forms of three lignites exposed to pyrolysis temperatures between 350 and 950. Fuel, 83(2004)1063-1070.

DOI: 10.1016/s0016-2361(03)00143-1