Co-Pyrolysis Characteristics of Torrefied Pine Sawdust with Different Rank Coals

Wang, Yanjie; Hao, Ying; Sun, Yunjuan; Jiang, Jun-Fei; Jiang, Jianchun; Gao, Yiwei; Yu, Wei-Jin

doi:10.15376/biores.8.4.5169-5183

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…Based on the Friedman method, E values for NB varied between 211.81 and 971.69 kJ mol –1 , while those for RK and TK ranged between 159.85 and 225.1 kJ mol –1 and 120.8 and 479.73 kJ mol –1 , respectively. These values were consistent with those reported in previous studies. , The lower E values for the RK/TK ratio indicate that these are suitable for co-pyrolysis with coals involving higher E values.…”

Section: Results and Discussionsupporting

confidence: 92%

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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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Section: Results and Discussionsupporting

confidence: 92%

“…These values were consistent with those reported in previous studies. 14,38 The lower E values for the RK/TK ratio indicate that these are suitable for copyrolysis with coals involving higher E values.…”

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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Gaussian model analysis and thermal decomposition kinetics of nature fibers

Huang

Teng

2022

Journal of Cleaner Production

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Product characterization and kinetic study of co-pyrolysis of waste jute sacks and sesame oil cake

Poddar

Biswas

Chowdhury

et al. 2014

2014 Power and Energy Systems: Towards Sustainable Energy

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The co-pyrolysis of sesame oil cake and the waste jute sacks has been conducted in a long tubular type semi-batch reactor in the temperature range of 573 to 1173K in N2 atmosphere. A reaction scheme has been proposed where two parallel reactions occur simultaneously to produce volatiles and char. Kinetic parameters, namely, rate constants, frequency factors, activation energies have been determined through nonlinear regression analysis. Effects of co-pyrolysis temperature have been observed on product yields. The pH value of the oil confirmed that the oil is acidic in nature. The functional groups of the pyro-oil have been analyzed by Fourier Transform Infrared (FTIR) spectroscopy to identify the basic functional groups. The energy yield of the pyro-oil has been calculated.

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Co-Pyrolysis Characteristics of Torrefied Pine Sawdust with Different Rank Coals

Cited by 3 publications

References 10 publications

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

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

Gaussian model analysis and thermal decomposition kinetics of nature fibers

Product characterization and kinetic study of co-pyrolysis of waste jute sacks and sesame oil cake

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