Research Papers

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

[+] Author and Article Information
H. Haykiri-Acma

Chemical and Metallurgical Engineering Faculty,
Chemical Engineering Department,
Istanbul Technical University,
Maslak, Istanbul 34469, Turkey

S. Yaman

Chemical and Metallurgical Engineering Faculty,
Chemical Engineering Department,
Istanbul Technical University,
Maslak, Istanbul 34469, Turkey
e-mail: yamans@itu.edu.tr

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received May 31, 2018; final manuscript received July 11, 2018; published online September 17, 2018. Assoc. Editor: Matthew Oehlschlaeger.

J. Thermal Sci. Eng. Appl 11(1), 011006 (Sep 17, 2018) (8 pages) Paper No: TSEA-18-1286; doi: 10.1115/1.4040992 History: Received May 31, 2018; Revised July 11, 2018

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.

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Grahic Jump Location
Fig. 1

Ground biomass samples—hybrid poplar (a), ash tree (b), and rhododendron (c)

Grahic Jump Location
Fig. 6

B and D analysis results for HPB

Grahic Jump Location
Fig. 4

Comparison of the burning profiles of biochars with lignite

Grahic Jump Location
Fig. 5

Burning profiles of the blends containing 15% biochars

Grahic Jump Location
Fig. 3

Burning profiles of the parent samples



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