Investigation of the influence of metallic fuel improvers on coal combustion/pyrolysis

The influence of iron-, aluminum-, and silicon-based oxides (fuel improver) toward coal combustion was investigated in a thermogravimetric analyzer (TGA) coupled with a Fourier transform infrared (FTIR) spectrophotometer, temperature-controlled two-stage bench reactor (TSBR), and 100 kWth combustion test facility (CTF). The metallic oxides, 5, 15, and 33% by weight, to prepare overall 20 mg of sample blends were mixed with pulverized coal for the TGA–FTIR study. The individual unblended samples of fuel improver and coal were also analyzed separately. The analysis of fuel improver samples revealed no evidence of hydrocarbon release or weight change; however, substantial changes in the weight as well as the release of hydrocarbons (HCs) and CO were observed for coal. More importantly, the study of the combustion data shows a distinct change in the peak intensities for CO and HCs, especially when the coal sample was blended with 5, 15, and 33% (by weight) of fuel improvers. This suggests enhanced cracking of...

[1]  J. B. Riggs,et al.  Catalytic cracking of benzene on iron oxide-silica: catalyst activity and reaction mechanism , 1985 .

[2]  James A. Miller,et al.  Mechanism and modeling of nitrogen chemistry in combustion , 1989 .

[3]  M. Baerns,et al.  Selective gas-phase oxidation of polycyclic aromatic hydrocarbons on vanadium oxide-based catalysts , 1997 .

[4]  A. Hayhurst,et al.  Kinetics of the conversion of NO to N2 during the oxidation of iron particles by NO in a hot fluidised bed , 1998 .

[5]  A. Renken,et al.  Reduction of nitrogen oxides by carbon monoxide over an iron oxide catalyst under dynamic conditions , 1998 .

[6]  P. Fennell,et al.  The kinetics of the reduction of NO to N2 by reaction with particles of Fe , 2002 .

[7]  K. Mondal,et al.  Reduction of iron oxide in carbon monoxide atmosphere—reaction controlled kinetics , 2004 .

[8]  S. Khanna,et al.  Self-stimulated NO reduction and CO oxidation by iron oxide clusters. , 2004, Physical review letters.

[9]  K. Mondal,et al.  Effect of gas composition on the kinetics of iron oxide reduction in a hydrogen production process , 2005 .

[10]  Zhi Wang,et al.  Reactivity of pulverized coals during combustion catalyzed by CeO2 and Fe2O3 , 2010 .

[11]  Azhar Uddin,et al.  Steam reforming of naphthalene as model biomass tar over iron–aluminum and iron–zirconium oxide catalyst catalysts , 2010 .

[12]  Tianhu Chen,et al.  Effect of Additives on Catalytic Cracking of Biomass Gasification Tar over a Nickel-Based Catalyst , 2010 .

[13]  Janusz Lasek,et al.  Investigations of the reduction of NO to N2 by reaction with Fe under fuel-rich and oxidative atmosphere , 2010, Heat and Mass Transfer.

[14]  Tokuji Kimura,et al.  Production of chemicals by cracking pyrolytic tar from Loy Yang coal over iron oxide catalysts in a , 2011 .

[15]  Thomas Nordgreen,et al.  Biomass gasification in an atmospheric fluidised bed: Tar reduction with experimental iron-based granules from Höganäs AB, Sweden , 2011 .

[16]  G. Djéga-Mariadassou,et al.  Catalytic decomposition of nitrogen oxides from coal combustion flue gases on CeZrO2 supported Cu catalysts , 2011 .

[17]  S. S. Daood,et al.  Deep-staged, oxygen enriched combustion of coal , 2012 .

[18]  A. Zabaniotou,et al.  Fe catalysis for lignocellulosic biomass conversion to fuels and materials via thermochemical processes , 2012 .

[19]  A. Gomez,et al.  Combustion and Flame , 2017 .

[20]  Keng-Tung Wu,et al.  The characteristics of torrefied microalgae , 2012 .