Structural characterization of carbonized briquette obtained from anthracite powder

Zhao, Yuqiong; Zhang, Yongfa; Zhang, Huirong; Wang, Qi; Guo, Yunfei

doi:10.1016/j.jaap.2015.01.009

Cited by 29 publications

(8 citation statements)

References 32 publications

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“…As an important raw material for carbon products, highmetamorphic anthracite exhibits the characteristics of high carbon content, compact structure, high strength, good thermal stability, and lower cost than petroleum coke [3][4][5][6]. Hence, highmetamorphic anthracite can be an ideal raw material to replace petroleum coke for the preparation of carbon anode.…”

Section: Introductionmentioning

confidence: 99%

Effect of high-temperature pyrolysis on the structure and properties of coal and petroleum coke

Xiao

Zhong

et al. 2016

Journal of Analytical and Applied Pyrolysis

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Section: Introductionmentioning

confidence: 99%

Effect of high-temperature pyrolysis on the structure and properties of coal and petroleum coke

Xiao

Zhong

et al. 2016

Journal of Analytical and Applied Pyrolysis

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“…In addition, I G has the same order as I D , which means that gasification reactivity of different chars could not be ascertained only through I D or I G . It is known that the ratio of the intensities of the D band to the G band (I D /I G ) is one of the most important Raman parameters to study the degree of organization of carbon materials[49].The value of the Raman parameter I D /I G increases with the decrease in the uniformity of carbonaceous structure, or the increase in the degree of amorphousness.Fig.7(b)shows the dependence of parameter I D /I G of different chars, and it could be found that the order of I D /I G value sequence for various chars can be ranked as PSD-char<BS-char< RL-char<WS-char<MC-char<PS-char. This trend was identical with the trend of the gasification reactivity.…”

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confidence: 99%

Experimental and modeling studies on CO2 gasification of biomass chars

Wang

Zhang

Shao

et al. 2016

Energy

128

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The CO 2 gasification properties and kinetics of biomass chars including four kinds of herbaceous residues and two kinds of wooden residues have been studied by the method of isotherm-gravimetric analysis. In addition, the chemical components as well as physical structures of six chars were systematically tested. Results show that gasification reactivity of herbaceous residue char were better than that of wooden residue char. It was found that gasification reactivities of char were mostly determined by its carbonaceous structure. Four kinetic models were applied to describe the gasification behavior of biomass chars: the volumetric model(VM), the grain model(GM), the random pore model(RPM) and the modified random pore model(MRPM). It was found that the RPM and MRPM model were better for describing the reactivity of different chars. However, for the gasification process in which the peak gasification rate appears in high conversion range, the MRPM performs better. At the same time, a marked compensation effect was also presented between the activation energy and pre-exponential factor when the Arrhenius law was used to describe the temperature dependence of gasification rate of char.

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“…18 The lower surface area of the coal char is probably because the inorganic material partially fills or blocks its micropores. 31,32 The volatile−volatile and volatile−char interactions during co-pyrolysis at high temperatures also impact meso-and macroporosity. Plausibly, volatiles produced by RK and TK can condense on the coal char surface as carbonaceous deposits.…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of the Synergistic Effects of Blending Raw/Torrefied Biomass and Vietnamese Anthracite Using Co-pyrolysis

et al. 2021

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Biomass can be upgraded via torrefaction, and torrefied kenaf (TK) is a fuel that allows blending with coal at high ratios. In the present study, raw kenaf (Hibiscus cannabinus L.) (RK) was torrefied at 523 K for 30 min and then mixed with Vietnamese anthracite (NinhBinh, NB) before co-pyrolysis. Thermogravimetric (TG) analysis was used to evaluate the behavior of RK, TK, and blended RK/TK during co-pyrolysis at biomass blending ratios (BBRs) of 0, 25, 50, 75, and 100 wt %. The TG and derivative thermogravimetry curves of a mixture of NB and RK (NBRK) were similar to those of RK. The decomposition curves of a mixture of NB and TK (NBTK) depended on the mass fraction of TK. Based on weight loss differences between the experimental and calculated data for the fuel blends, no interaction between the RK and anthracite was observed for all BBRs, whereas anthracite involving 50 and 75% TK exhibited synergistic effects. The temperature range for synergy and degree of synergy for NB and TK depended on the heating rate and mass ratio of TK. Kinetic parameters were calculated using the Friedman−non-isothermal free kinetic method at heating rates of 10, 20, and 40 K/min. The results showed that the activation energy (E) values of the NBRK at conversion ratios of 0.2−0.5 were equal to those of the RK, whereas they were superior at NB decomposition ratios of 0.6−0.8. NBTK1-1 (BBR of 50%) showed E values higher than those of NB at some conversion ratios, thus demonstrating a negative impact of blending. Further, NBTK1-3 (BBR of 75%) and NBTK3-1 (BBR of 25%) exhibited E values between those of NB and TK. The present study suggests that a high TK mass fraction (75%) in the blend for co-pyrolysis is optimal for the activation energy and volatile matter yield.

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Structural characterization of carbonized briquette obtained from anthracite powder

Cited by 29 publications

References 32 publications

Effect of high-temperature pyrolysis on the structure and properties of coal and petroleum coke

Effect of high-temperature pyrolysis on the structure and properties of coal and petroleum coke

Experimental and modeling studies on CO2 gasification of biomass chars

Comparative Study of the Synergistic Effects of Blending Raw/Torrefied Biomass and Vietnamese Anthracite Using Co-pyrolysis

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