Catalytic effects of metal oxides on combustion characteristics of inferior coal, sludge, and their mixture were investigated by thermogravimetric analysis. Combustion and thermal dynamic characteristics including ignition temperatures, apparent activation energy, and frequency factors of inferior coal, sludge, and their mixture were observed. The catalytic effects and mechanism of combustion were discussed. Results showed that thermal gravity analysis (TG) and derivative thermogravimetric analysis (DTG) curves of coal and sludge shifted to lower temperature side, the weight losses increased, and the ignition performance was improved with the addition of metal oxides CaO, Al2O3, and K2O. The combustion dynamics analysis showed that the apparent activation energy of cocombustion of coal blending sludge decreased by 11–20% and the frequency factors increased by 20–30%. The minimum apparent activation energy and the maximum frequency factors were obtained in the presence of K2O, indicating that the catalytic effect of K2O was most significant.
Issue Section:
Fuel Combustion
References
1.
Banerjee
, S.
, 2011
, “Glucose From Paper Mill Sludge
,” Bioresources
, 6
(4
), pp. 4739
–4746
.2.
Hu
, S. H.
, and Hu
, S. C.
, 2013
, “Pyrolysis of Paper Sludge and Utilization for Ionic Dye Adsorption
,” Bioresources
, 8
(1
), pp. 1028
–1042
.3.
Yan
, Y. F.
, Zhang
, Z. E.
, Zhang
, L.
, and Zhang
, L.
, 2014
, “Influence of Coal Properties on the Co-Combustion Characteristics of Low-Grade Coal and City Mud
,” Global NEST J.
, 16
(2
), pp. 329
–338
.4.
Jang
, J. G.
, Du
, X. J.
, and Yang
, S. S.
, 2010
, “Analysis of the Combustion of Sewage Sludge-Derived Fuel by a Thermogravimetric Method in China
,” Waste Manage.
, 30
(7
), pp. 1407
–1413
.5.
Wen
, J. M.
, Chi
, Y.
, Liu
, Y. Y.
, Jin
, Y. Q.
, Yan
, J. H.
, and Cen
, K. F.
, 2004
, “Study on Kinetics of Municipal Sewage Sludge Combustion
,” Power Syst. Eng.
, 20
(5
), pp. 5
–7
.6.
Yan
, Y. F.
, Zhang
, L.
, Zhang
, L.
, Lei
, Q.
, and Zhang
, J.
, 2013
, “The Influence of Oxygen Concentration on the Combustion Characteristics of Inferior Coal and Sludge Mixture
,” J. Fuel Chem. Technol.
, 41
(4
), pp. 430
–435
.7.
Yu
, L. Y.
, and Li
, P. S.
, 2014
, “Thermogravimetric Analysis of Coal and Sludge Co-Combustion With Microwave Radiation Dehydration
,” J. Energy Inst.
, 87
(3
), pp. 220
–226
.8.
Shimizu
, T.
, Toyono
, M.
, and Ohsawa
, H.
, 2007
, “Emissions of NOx and N2O During Co-Combustion of Dried Sewage Sludge With Coal in a Bubbling Fluidized Bed Combustor
,” Fuel
, 86
(7–8
), pp. 957
–964
.9.
Folgueras
, M. B.
, and Díaz
, R. M.
, 2010
, “Influence of FeCl3 and Lime Added to Sludge on Sludge–Coal Pyrolysis
,” Energy
, 35
(12
), pp. 5250
–5259
.10.
Liao
, Y. F.
, and Ma
, X. Q.
, 2010
, “Thermogravimetric Analysis of the Co-Combustion of Coal and Paper Mill Sludge
,” Appl. Energy
, 87
(11
), pp. 3526
–3532
.11.
Tola
, V.
, Cau
, G.
, Ferrara
, F.
, and Pettinau
, A.
, 2016
, “CO2 Emissions Reduction From Coal-Fired Power Generation: A Techno-Economic Comparison
,” ASME J. Energy Resour. Technol.
, 138
(6
), p. 061602
.12.
Cheng
, X.
, Han
, K.
, Huang
, Z.
, and Wang
, Z.
, 2016
, “Ash Fusibility Based on Modes of Occurrence and High-Temperature Behaviors of Mineral Matter in Coals
,” ASME J. Energy Resour. Technol.
, 139
(2
), p. 022003
.13.
Xiao
, B.
, Jiang
, T.
, and Zhang
, S.
, 2016
, “Novel Nanocomposite Fiber-Laden Viscoelastic Fracturing Fluid for Coal Bed Methane Reservoir Stimulation
,” ASME J. Energy Resour. Technol.
, 139
(2
), p. 022906
.14.
Rokni
, E.
, Hsein
, C. H.
, and Levendis
, Y. A.
, 2017
, “In-Furnace Sulfur Capture by Cofiring Coal With Alkali-Based Sorbents
,” ASME J. Energy Resour. Technol.
, 139
(4
), p. 042204
.15.
Magdziarz
, A.
, and Wilk
, M.
, 2013
, “Thermogravimetric Study of Biomass, Sewage Sludge and Coal Combustion
,” Energy Convers. Manage.
, 75
, pp. 425
–430
.16.
Li
, Y. Y.
, Jin
, Y. Y.
, and Li
, H.
, 2011
, “Thermogravimetric Analysis and Co-Combustion Characteristics of Dried Sludge and Coal
,” China Environ. Sci.
, 31
(3
), pp. 408
–411
.17.
Taniguchi
, M.
, Okazaki
, H.
, Kobayashi
, H.
, Shigeru
, A.
, Hiroshi
, M.
, Muto, H., and Tsumura, T., 2000
, “Pyrolysis and Ignition Characteristics of Pulverized Coal Particles
,” ASME J. Energy Resour. Technol.
, 123
(1
), pp. 32
–38
.18.
Chen
, L.
, Song
, P.
, Long
, W.
, Feng
, L.
, Zhang
, J.
, and Wang
, Y.
, 2017
, “Experimental Study of Operation Stability of a Spark Ignition Engine Fueled With Coal Bed Gas
,” ASME J. Energy Resour. Technol.
, 139
(4
), p. 044501
.19.
Shao
, J. G.
, Yan
, R.
, Chen
, H. P.
, Yang
, H. P.
, and Lee
, D. H.
, 2010
, “Catalytic Effect of Metal Oxides on Pyrolysis of Sewage Sludge
,” Fuel Process. Technol.
, 91
(9
), pp. 1113
–1118
.20.
Xiao
, H. M.
, Ma
, X. Q.
, and Liu
, K.
, 2010
, “Co-Combustion Kinetics of Sewage Sludge With Coal and Coal Gangue Under Different Atmospheres
,” Energy Convers. Manage.
, 51
(10
), pp. 1976
–1980
.21.
Zhang
, C. Q.
, Jiang
, X. M.
, Wei
, L. H.
, and Wang
, H.
, 2007
, “Research on Pyrolysis Characteristics and Kinetics of Super Fine and Conventional Pulverized Coal
,” Energy Convers. Manage.
, 48
(3
), pp. 797
–802
.22.
He
, H. Z.
, Luo
, Z. Y.
, and Cen
, K. F.
, 2005
, “Study on Dynamic Reaction Parameters of Anthracite Combustion by Using Different Thermoanalytical Methods
,” J. Power Eng.
, 25
(4
), pp. 493
–499
.23.
Xu
, C. F.
, Sun
, X. X.
, and Guo
, X.
, 2005
, “Analysis of Main Factors Affecting Thermogravimetric Curves in Thermogravimetric Test
,” Therm. Power Gener.
, 34
(6), pp. 34
–36
.24.
Li
, X. G.
, Ma
, B. G.
, Xu
, L.
, Luo
, Z. T.
, and Wang
, K.
, 2007
, “Catalytic Effect of Metallic Oxides on Combustion Behavior of High Ash Coal
,” Energy Fuels
, 21
(5
), pp. 2669
–2672
.25.
Liu
, J. Y.
, Sun
, S. Y.
, Long
, L. S.
, Chen
, T.
, and Chen
, M. T.
, 2009
, “Catalytic Actions and Reaction Mechanism of Compounds With Metal Elements on the Combustion of Mixed Industrial Sludge
,” Proc. CSEE
, 29
(23
), pp. 51
–60
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