Wet torrefaction of bamboo saw dust and its co-pyrolysis with plastic

Alam, Mahboob; Rammohan, Draksharapu; Bhavanam, Anjireddy; Peela, Nageswara Rao

doi:10.1016/j.fuel.2020.119188

Cited by 34 publications

(9 citation statements)

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“…Since AM seed was a dense material consisting of several compounds like hemicellulose, cellulose and lignin, the pyrolysis process mechanism of AM was very complex. Similar results are obtained in the PR and CF pyrolysis process [6] and bamboo sawdust pyrolysis [44]. The reaction mechanisms of root, stem and leaf fitted well with different Avrami-Erofeyev reaction models when the pyrolysis behaviour and kinetic characteristics of Phragmites hirsuta (root, stem and leaf) were determined [45].…”

Section: Reaction Mechanism Analysissupporting

confidence: 77%

Evaluation of kinetic and thermodynamic parameters of Argemone mexicana seed pyrolysis via thermogravimetric analyser

Pandey

Sahoo

2021

Biomass Conv. Bioref.

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The pyrolysis kinetics of Argemone mexicana seed, an extensively found naturalized weed in agricultural fields, was studied via thermogravimetric analysis under N 2 atmosphere at heating rates of 10 °C/min, 20 °C/min and 30 °C/min. Five kinetic approaches, viz. Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW), Friedman (FRM), Starink (STR) and Vyazovkin (VYZ) methods, and a model-fitting approach (Kennedy and Clarke method) were employed on thermogravimetric information of Argemone mexicana seed to evaluate the kinetic parameters such as activation energy, pre-exponential factor and thermodynamic parameters. Activation energies procured from KAS, OFW, FRM, STR and VYZ methods were 174, 185.08, 212.86, 175.11 and 174.36 kJ/mol, respectively. Furthermore, an appropriate reaction mechanism was identified by the master plot method. The average pre-exponential factor obtained through the Kissinger approach was 8.23E + 22, 1.68E + 22 and 8.05E + 21 s −1 at three different heating rates. The average values of thermodynamic parameters (ΔH, ΔG and ΔS) were 169.28 kJ/mol, 212.64 kJ/mol and − 70.95 J/mol at a lower heating rate of 10 °C/min. Experimental results reveal that kinetic parameters from the five model-free isoconversional methods are in better compliance with similar biomass materials, and Argemone mexicana seed can prove to be a promising alternating source for biofuel production. KeywordsLignocellulosic biomass • Argemone mexicana non-edible oilseed • Non-isothermal pyrolysis kinetics • Reaction mechanism • Thermodynamic analysis Highlights • First study concerning the pyrolysis kinetics of Argemone mexicana non-edible oilseed • Utilization of KAS, OFW, FRM, STR and VYZ model-free methods and KC model-fitting method • Suitability of biomass feedstock for bioenergy production through the pyrolysis process * Sachin Kumar

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Section: Reaction Mechanism Analysissupporting

confidence: 77%

Evaluation of kinetic and thermodynamic parameters of Argemone mexicana seed pyrolysis via thermogravimetric analyser

Pandey

Sahoo

2021

Biomass Conv. Bioref.

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“…The three main components of the RK and TK, including CE (700−1500 cm −1 ), HE (1600−2000 cm −1 ), and LG (1200−1700 cm −1 ), are highlighted in Figure 2. 15 Bands at approximately 3300−3600 cm −1 are attributed to O−H stretching vibrations of hydroxyl and carboxyl groups. 24 The lower peak of the O−H group in the TK compared to that in the RK is caused by its hydrophobicity.…”

Section: Resultsmentioning

confidence: 99%

“…The three main components of the RK and TK, including CE (700–1500 cm –1 ), HE (1600–2000 cm –1 ), and LG (1200–1700 cm –1 ), are highlighted in Figure …”

Section: Results and Discussionmentioning

confidence: 99%

“…For example, Lu et al 14 indicated that the characteristics of pyrolyzed mixtures of raw/torrefied wood and coal can be predicted through the weight loss of the individual materials. Alam et al 15 indicated that the decomposition of the torrefied bamboo sawdust was inhibited by the addition of the linear low-density polyethylene. Conversely, Wu et al 16 reported that the effects of HE and LG on char yields depend on the mixing ratio and temperature range.…”

Section: Introductionmentioning

confidence: 99%

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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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“…The catalytic degradation of single or mixed samples is a process involving hundreds of complex reactions, which makes it difficult to predict the reaction mechanism. However, mathematical models have been developed to predict solid reaction mechanisms based on various approximations (Table 3; Poletto et al, 2012;Alam et al, 2021). Based on Criado's method, Z-Master diagram was used to evaluate the mechanism of solid reaction.…”

Section: Prediction Of Reaction Modelmentioning

confidence: 99%

Plastic regulates its co-pyrolysis process with biomass: Influencing factors, model calculations, and mechanisms

Wang

An²,

Zhao³

et al. 2022

Front. Ecol. Evol.

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Co-pyrolysis of plastics and biomass can effectively improve the quality of bio-oil and solve the problem of plastic pollution. However, synergistic effect of co-pyrolysis on kinetics and the role of biomass H/Ceff in co-pyrolysis are still not conclusive. In this work, the co-pyrolysis synergistic effects of three different hydrogen-to-carbon ratio (H/Ceff) of biomass-rice husk (RH), sugarcane bagasse (SUG), and poplar wood (PW) with hydrogen-rich polypropylene (PP) were studied using a thermogravimetric method. The total synergy degree (φ) and the difference between experimental and theoretical weight losses (ΔW) were defined, and the activation energies of various experimental materials were calculated by the isoconversional method. The results showed that the addition of PP reduced the dependence of product species on biomass H/Ceff during co-pyrolysis. The synergistic effect of biomass and PP was related to biomass types, pyrolysis temperature, and mass ratio of biomass to PP. The mixture of SUG and PP showed positive synergistic effect at all mass ratios. Simultaneously, at the low temperature of pyrolysis, the synergistic effect is inhibited in all mixtures, which might be due to the melting of PP. Kinetic analysis showed that the activation energy could be reduced by 11.14–31.78% by co-pyrolysis with biomass and PP. A multi-step mechanism was observed in both the pyrolysis of a single sample and the co-pyrolysis of a mixture, according to Criado’s schematic analysis.

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Wet torrefaction of bamboo saw dust and its co-pyrolysis with plastic

Cited by 34 publications

References 50 publications

Evaluation of kinetic and thermodynamic parameters of Argemone mexicana seed pyrolysis via thermogravimetric analyser

Evaluation of kinetic and thermodynamic parameters of Argemone mexicana seed pyrolysis via thermogravimetric analyser

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

Plastic regulates its co-pyrolysis process with biomass: Influencing factors, model calculations, and mechanisms

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