Interactions of coal gangue and pine sawdust during combustion of their blends studied using differential thermogravimetric analysis.

The interactions between coal gangue and pine sawdust during the combustion process were studied using thermogravimetric analysis. The effect of the blending ratio, oxygen concentration and heating rate on the weight loss (TG) and differential thermogravimetric (TGA) profiles was examined. The TG and DTG curves of the blends were not additives of those of the individual materials, suggesting that interactions between coal gangue and pine sawdust had occurred during the combustion, especially in the temperature range of 400-600°C. Kinetic analysis confirmed that the combustion of coal gangue, pine sawdust and their blends was chemical reaction controlled. Further analysis revealed that the interactions between coal gangue and pine sawdust were primarily due to thermal effects rather than structural changes, with the thermal inertia of coal gangue dominating over the behaviour of the blends. The interactions decreased with decreasing the coal gangue ratio in the blend, oxygen concentration and heating rate.

[1]  Edson L. Meyer,et al.  Thermogravimetric study of the pyrolysis characteristics and kinetics of coal blends with corn and sugarcane residues , 2013 .

[2]  Liu Zhenling,et al.  Recycling utilization patterns of coal mining waste in China , 2010 .

[3]  Arash Tahmasebi,et al.  Pyrolysis and Combustion Behavior of Coal Gangue in O2/CO2 and O2/N2 Mixtures Using Thermogravimetric Analysis and a Drop Tube Furnace , 2013 .

[4]  Xiangyong Huang,et al.  Combustion Characteristics of Fine- and Micro-pulverized Coal in the Mixture of O2/CO2 , 2008 .

[5]  Guo Yanxi,et al.  Industrial development and prospect about comprehensive utilization of coal gangue , 2014 .

[6]  Guijian Liu,et al.  Thermochemical and trace element behavior of coal gangue, agricultural biomass and their blends during co-combustion. , 2014, Bioresource technology.

[7]  Guijian Liu,et al.  Investigation on thermal and trace element characteristics during co-combustion biomass with coal gangue. , 2015, Bioresource technology.

[8]  O. Levenspiel.  Chemical Reaction Engineering , 1972 .

[9]  N. Selçuk,et al.  Air and oxy-fuel combustion characteristics of biomass/lignite blends in TGA-FTIR , 2011 .

[10]  S. Vassilev,et al.  An overview of the behaviour of biomass during combustion: Part I. Phase-mineral transformations of organic and inorganic matter , 2013 .

[11]  Eliseo Monfort,et al.  Environmental characterization of burnt coal gangue banks at Yangquan, Shanxi Province, China , 2008 .

[12]  Fengyin Wang,et al.  Thermogravimetric studies of the behavior of wheat straw with added coal during combustion. , 2009 .

[13]  Xiaoqian Ma,et al.  The thermal behaviour of the co-combustion between paper sludge and rice straw. , 2013, Bioresource technology.

[14]  Zhong Li,et al.  Combustion Characteristics of Coal Gangue under an Atmosphere of Coal Mine Methane , 2014 .

[15]  Zhang Yuanyuan,et al.  Investigation of combustion characteristics and kinetics of coal gangue with different feedstock properties by thermogravimetric analysis , 2015 .

[16]  Defu Che,et al.  Pyrolysis and combustion characteristics of coals in oxyfuel combustion , 2012 .

[17]  J. Kozinski,et al.  Thermal events occurring during the combustion of biomass residue , 2000 .

[18]  M. V. Gil,et al.  Thermal behaviour and kinetics of coal/biomass blends during co-combustion. , 2010, Bioresource technology.

[19]  Guijian Liu,et al.  Transformation behavior of mineral composition and trace elements during coal gangue combustion , 2012 .

[20]  T. Wall,et al.  The reactivity of pulverized coal char particles: experiments using ignition, burnout and DTG techniques and partly burnt chars , 1992 .

[21]  Zhengang Liu,et al.  A comparison of thermal behaviors of raw biomass, pyrolytic biochar and their blends with lignite. , 2013, Bioresource technology.

[22]  Khudzir Ismail,et al.  Combustion characteristics of Malaysian oil palm biomass, sub-bituminous coal and their respective blends via thermogravimetric analysis (TGA). , 2012, Bioresource technology.

[23]  Cheoreon Moon,et al.  Effect of blending ratio on combustion performance in blends of biomass and coals of different ranks , 2013 .

[24]  T. Wall,et al.  Ignition of coal particles: the influence of experimental technique , 1994 .

[25]  D. Vamvuka,et al.  Combustion behaviour of biomass fuels and their blends with lignite , 2011 .

[26]  P. Liu,et al.  An experimental investigation into the ignition and combustion characteristics of single droplets of biochar water slurry fuels in air , 2017 .

[27]  Zhengang Liu,et al.  Thermogravimetric investigation of hydrochar-lignite co-combustion. , 2012, Bioresource technology.

[28]  Mathieu Lucquiaud,et al.  CO2 capture-ready ultra-supercritical coal power plants , 2013 .

[29]  D. Vamvuka,et al.  A comparative reactivity and kinetic study on the combustion of coal–biomass char blends , 2006 .

[30]  G. Choi,et al.  The effect of wood biomass blending with pulverized coal on combustion characteristics under oxy-fuel condition , 2014 .

[31]  Hanzade Haykiri-Acma,et al.  Combustion characteristics of different biomass materials , 2003 .

[32]  Xiaoqian Ma,et al.  Co-combustion kinetics of sewage sludge with coal and coal gangue under different atmospheres , 2010 .

[33]  Wen-Jhy Lee,et al.  Thermogravimetric analysis and kinetics of co-pyrolysis of raw/torrefied wood and coal blends , 2013 .