Combustion Characteristics of Coal and Waste Fuels by Thermogravimetric Analysis

2016 ◽  
Vol 33 (5) ◽  
pp. 461-466 ◽  
Author(s):  
Jeong Min Park ◽  
◽  
Sangin Keel ◽  
Jinhan Yun ◽  
Ji Hye Yun ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Combustion Characteristics

Co-combustion Characteristics and Kinetics Behavior of Torrefied Sugarcane Bagasse and Lignite

2021 ◽  
Vol 10 (4) ◽  
pp. 737-746
Author(s):  
Ukrit Samaksaman ◽  
Kanit Manatura
Keyword(s):  
Thermogravimetric Analysis ◽  
Physicochemical Properties ◽  
Burning Rate ◽  
Sugarcane Bagasse ◽  
Combustion Characteristics ◽  
Firing Process ◽  
Combustion System ◽  
Heating Value ◽  
Kinetics Of ◽  
Derivative Thermogravimetry

The co-combustion characteristics and kinetics of torrefied sugarcane bagasse (TB), lignite (L), and their blended samples were experimentally investigated using thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG)based on the Coats-Redfern method for kinetic estimation.Their physicochemical properties were also investigated.Raw bagasse was thermally treated in a laboratory-scale torrefactor at 275 °C with a torrefaction time of 60 min under an inert nitrogen environment.Then, the torrefied bagasse was blended with Thai lignite as a co-fuel at ratios of 50:50 (TB50L50), 70;30(TB70L30), and 90:10 (TB90L10), respectively. Torrefaction improved the fuel properties and heating value of the raw bagasse as well as reducing the O/C and H/C ratios.In addition, the blending of torrefied bagasse with lignite improved the combustion behavior.The TGA and DTG results indicated that the ignition and burnout temperatures stepped downwards with different increasing ratios of torrefied bagasse.The co-combustion behavior at the maximum burning rate showed that the burnout temperatures of TB50L50, TB70L30, and TB90L10 were 532, 529, and 528 °C, respectively, indicating a slight decrease with an increasing torrefied bagasse blending ratio.These results were sufficient to provide comprehensive guidelines in terms of the design and operation of the combustion system for adding torrefied bagasse into the co-firing process.

Thermogravimetric Analysis of Combustion Characteristics of Palm Oil and Rapeseed Oil Biodiesel

2014 ◽  
Vol 14 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Yongbin Lai ◽  
Bo Wang ◽  
Xiu Chen ◽  
Yinnan Yuan ◽  
Lei Zhong ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Palm Oil ◽  
Rapeseed Oil ◽  
Combustion Characteristics

Synergistic Investigation for Co-Combustion of Biochars and Lignite—Thermogravimetric Analysis Approach

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Haykiri-Acma ◽  
S. Yaman
Keyword(s):  
Thermal Analysis ◽  
Thermogravimetric Analysis ◽  
Hybrid Poplar ◽  
Calorific Value ◽  
High Reactivity ◽  
Combustion Characteristics ◽  
Heterogeneous Reactions ◽  
Analysis Approach ◽  
Fundamental Change ◽  
Burning Behavior

Abstract This paper addresses whether synergistic interaction or additive behavior govern the co-combustion characteristics of lignite and biochars produced from hybrid poplar (HP), ash tree (AT), and rhododendron (RH). The biochars were blended with lignite and the burning behavior was investigated by thermal analysis. Upon carbonization, fundamental change occurred in the burning mechanisms of biomass from homogeneous to heterogeneous reactions. Blending the lignite with biochars led to improvement in the calorific value and reductions in the ash yield. Carbonization limited the high reactivity of biomass, and the reactivities of biochars became closer to the lignite's reactivity, consequently they burned in accord without segregation.

Investigation on the Co-Combustion Characteristics of Textile Dyeing Sludge and Sawdust

2011 ◽  
Vol 391-392 ◽  
pp. 1440-1444
Author(s):  
Pei Tao Wei ◽  
Xu Nan Ning ◽  
Yun Zhou ◽  
Jing Yong Liu ◽  
Jun Yu
Keyword(s):  
Thermogravimetric Analysis ◽  
Combustion Characteristics ◽  
Combustion Characteristic ◽  
Burning Time ◽  
Heating Rates ◽  
Fixed Carbon ◽  
Characteristic Index ◽  
Textile Dyeing ◽  
Carbon Combustion ◽  
Two Stages

The combustion characteristics of textile dyeing sludge，sawdust and its blends at different proportions were studied by thermogravimetric analysis(TG-DTG) at different heating rates. The results showed that there existed four obviously temperature zones during the textile dyeing sludge combustion curves, which were corresponding to moisture's exhalation、two stages of devolatilizations and fixed carbon combustion. With the increasing of heating rates, the burning time was shorten and the combustion rate was faster of the textile dying sludge. DTG curve of the blends was more closed to that of the larger proportions. Comprehensive combustion characteristic index SN of the sludge-sawdust blends showed an uptrend, which demonstrated that higher volatility had better combustion characteristics.

Experimental Research on Catalytic Combustion Characteristics of Inferior Coal and Sludge Mixture

2017 ◽  
Vol 140 (3) ◽  
Author(s):  
Yunfei Yan ◽  
Shuai Feng ◽  
Li Zhang ◽  
Lixian Li ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermogravimetric Analysis ◽  
Metal Oxides ◽  
Apparent Activation Energy ◽  
Combustion Characteristics ◽  
Combustion Dynamics ◽  
Weight Losses ◽  
Coal Sludge ◽  
Lower Temperature ◽  
Catalytic Effects

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.

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