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.

scholarly journals Thermal analysis of different Refuse Derived Fuels (RDFs) samples

2021 ◽  
pp. 249-249
Author(s):  
Gizem Ayas ◽  
Hakan Öztop
Keyword(s):  
Thermal Analysis ◽  
Thermogravimetric Analysis ◽  
Winter Season ◽  
Calorific Value ◽  
Heterogeneous Structure ◽  
Municipal Solid Wastes ◽  
Scanning Calorimetry ◽  
Daily Lives ◽  
Refuse Derived Fuel ◽  
Refuse Derived Fuels

As a result of the activities carried out by people to maintain their daily lives in different places such as homes, hospitals, hotels or workplaces, waste consisting of furniture, paint, batteries, food waste, sachets, bottles, fabrics, and fibers with the heterogeneous structure is called Municipal Solid Waste (MSW). Secondary fuels with higher heating value, which are generated by recycling of non-recyclable and reusable wastes in municipal solid wastes, are called as Refuse Derived Fuel (RDF). In this study, Refuse Derived Fuel1 (RDF1 : taken in December, winter season) and Refuse Derived Fuel2 (RDF2 : taken in June, summer season) samples obtained from different dates were used. The ultimate, proximate, calorific value, X-Ray fluorescence (XRF), Thermogravimetric analysis (TGA), and Differential scanning calorimetry (DSC) analysis were performed for these samples. Combustion characterization from Refuse Derived Fuel samples was investigated in the applied analyzes. The results of the content analysis made were examined separately and compared with the Thermogravimetric analysis and Differential Thermal Analysis combustion graph curves. It was revealed that the Refuse Derived Fuel1 sample had a better combustion compared to the Refuse Derived Fuel2 sample, as the ash amount and content obtained as a result of the combustion also supported other data. In addition, the results of the analysis show how different the Refuse Derived Fuel samples taken from the same region in two different months are different from each other.

Thermal Analysis Approach and Instrument for Non-catalytic Gas-solid Reactions

2012 ◽  
Vol 39 (10) ◽  
pp. 1549-1554
Author(s):  
Jian YU ◽  
Jun-Rong YUE ◽  
Wen-Zhao LIU ◽  
Guang-Yi ZHANG ◽  
Guang-Wen XU
Keyword(s):  
Thermal Analysis ◽  
Analysis Approach

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

scholarly journals Influence of different temperature regimes at torrefaction of chicken litter on yield and properties of products

2019 ◽  
Vol 114 ◽  
pp. 06007
Author(s):  
Olga Larina ◽  
Yana Pudova
Keyword(s):  
Chemical Composition ◽  
Thermogravimetric Analysis ◽  
Liquid Fraction ◽  
Experimental Studies ◽  
Calorific Value ◽  
Solid Residue ◽  
Optimum Temperature ◽  
Volume Yield ◽  
Temperature Regimes ◽  
Chicken Litter

The purpose of the research is study the influence of the torrefaction process on the fuel properties of the chicken litter. Experimental studies on lab-scale system at five temperature regimes of torrefaction (220, 240, 260, 280, and 300 °C) with a holding time determined using thermogravimetric analysis were conducted. The products of the torrefaction are solid residue, non-condensable gases, and tar. For the feedstock and torrefied material the elemental composition, the lower calorific value, hygroscopicity limit and bulk density are determined. For liquid fraction the analysis of the chemical composition is carried out. The properties of non-condensable gases as chemical composition and calorific value - are investigated. Mass yields of the solid residue and tar, and specific volume yield of the non-condensable gases are presented. The conclusion about the optimum temperature regime for torrefaction of chicken litter based on the results of experimental studies is made.

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