Thermal behavior and organic functional structure of poplar-fat coal blends during co-pyrolysis

Qiu, Shuxing; Zhang, Shengfu; Zhou, Xiaosheng; Zhang, Qingyun; Qiu, Guibao; Hu, Meilong; You, Zhixiong; Li, Wen; Bai, Chenguang

doi:10.1016/j.renene.2019.01.015

Cited by 30 publications

(17 citation statements)

References 36 publications

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“…As for AC which had little volatile, the obstruction of the volatiles deposit was dominant. A similar correlation has been reported by Guo et al [16] and Qiu et al [17], who also the reported lower actual activation energies than the calculated values during co-pyrolysis of lignite and biomass. Meng et al [13] further pointed out that the increase of BBR can reduce the activation energy of biomass and bituminous coalblends.…”

Section: Kinetic Analysissupporting

confidence: 90%

“…This attributed to that the reactivity of cellulose and lignin components in biomass were different from that of coal in the two stages. Qiu et al [17] reported that the presence of poplar wood enhanced the thermal decomposition of lignite coal at a temperature range of 240-650°C during co-pyrolysis. The interaction between coal and biomass reduced their apparent activation energy and frequency factor.…”

Section: Introductionmentioning

confidence: 99%

“…Other factors such as use of catalyst [13,16,19], pre-treatment [18,20] and reactor configuration [16,19,21] can also affect the synergistic effect on the co-pyrolysis of biomass and coal. Some studies have been focused on the thermal behaviour and kinetic analysis of coal blended with different biomass, such as forestry residues [13,14,16,17], agricultural residue [15,19], microalgae [22,23], switchgrass [21], sugarcane residues [24], shell [12,20] etc.…”

Section: Introductionmentioning

confidence: 99%

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Co-pyrolysis of Miscanthus Sacchariflorus and coals: A systematic study on the synergies in thermal decomposition, kinetics and vapour phase products

Tian

Jiang

Cai

et al. 2020

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In this work, co-pyrolysis of Miscanthus Sacchariflorus (MS) and three ranks of coal, namely lignite (LC), bituminous coal (BC), and anthracite (AC), was performed at the analytical scale. The co-pyrolysis kinetic and products were analysed and compared theoretically and experimentally. The results revealed the synergistic effects of the coal rank and biomass blend ratio (BBR) on the thermal decomposition and the products in gaseous phase. The co-pyrolysis of MS-LC and MS-BC samples was characterised by three distinct stages, which were sequentially dominated by moisture removal, decomposition of MS, and decomposition of coal. The activation energies of the co-pyrolysis process were different from the activation energies of the pyrolysis of individual MS and coal samples. The kinetics analysis showed that increasing the BBR increased the activation energies of the MS-coal blends up to 25% at the temperatures below 350 °C. However, at the higher temperature range, this decreased the activation energies of MS-LC and MS-BC blends but increased those of MS-AC blends. Both of the coal rank and BBR had noticeable impacts on the thermal behaviour during co-pyrolysis. The optimum positive synergistic effects were obtained on MS-LC blend with a BBR of 1:1. The FTIR analysis results showed the evolution profiles of CH4, CO, CO2, water, formic acid, phenol and xylene. All the products analysed showed L-peaks (250-400 °C) corresponding to MS decomposition. Increasing the BBR promoted the release of all the analysed products from MS-LC and MS-BC, indicating the synergistic effect of the co-pyrolysis.

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Section: Kinetic Analysissupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Co-pyrolysis of Miscanthus Sacchariflorus and coals: A systematic study on the synergies in thermal decomposition, kinetics and vapour phase products

Tian

Jiang

Cai

et al. 2020

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“…The particles agglomerated which might have been due to the low melting point of lignin, which facilitated the agglomeration of lignin during pyrolysis 19 . In addition, the pore structure was remarkable and this could be associated with the release of volatile matter 24 . Although all the residues had a porous structure, OPGC (Fig.…”

Section: Resultsmentioning

confidence: 99%

Fast pyrolysis as an alternative to the valorization of olive mill wastes

et al. 2020

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BACKGROUND The valorization of organic wastes through fast pyrolysis appears to be a highly promising option for decreasing pollutants and reducing consumption of natural resources. For this purpose, three different olive pomace samples were studied to determine how olive crop location and the extraction process could influence bio‐oil product distribution. Olive pomace was selected as the feedstock due to the importance of the olive oil industry in Spain. RESULTS In this study, the conditions of fast pyrolysis were optimized using lignin as a reference, with the optimum conditions being 500 °C, 20 °C ms−1 as the heating rate and 15 s as the vapour residence time. The olive pomace results determined that not only their chemical composition, but also their fat content had a remarkable effect on product distribution obtained after fast pyrolysis. However, whereas high lignin content enhanced phenol production, cellulose decomposed to carboxylic acids. In addition, due to current global warming, the carbon dioxide (CO2) burden of the three samples was calculated using mass spectroscopy. The OPGC sample gave off the lowest amount of greenhouse gases, followed by OPMNE and OPMN. CONCLUSIONS The higher fat content in the sample enhanced carboxylic acid production. The difference in phenol production between OPMN and OPMNE could be attributed to the presence of potassium. From an environmental point of view, the use of olive pomace wastes could reduce CO2 emissions with further research and by developing experimental processes. © 2020 Society of Chemical Industry

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“…8,33,34 These radicals can produce low molecular weight molecules such as m-xylene, phenol, and tetradecane in the tar and ethylene and acetylene in the released gas. 33,35 Many studies have conrmed that synergistic effects occur in the co-pyrolysis of fat coal and poplar, which results in a higher depolymerization reaction rate and lower polymerization reaction rate during this process. [36][37][38] This would improve the hydrocarbon-generating potential and shorten the aliphatic chain length at low poplar blending ratios.…”

Section: Tar Structures Of Fat Coal Poplar and Their Blendsmentioning

confidence: 99%

Effects of poplar addition on tar formation during the co-pyrolysis of fat coal and poplar at high temperature

et al. 2019

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Thermal behavior and organic functional structure of poplar-fat coal blends during co-pyrolysis

Cited by 30 publications

References 36 publications

Co-pyrolysis of Miscanthus Sacchariflorus and coals: A systematic study on the synergies in thermal decomposition, kinetics and vapour phase products

Co-pyrolysis of Miscanthus Sacchariflorus and coals: A systematic study on the synergies in thermal decomposition, kinetics and vapour phase products

Fast pyrolysis as an alternative to the valorization of olive mill wastes

Effects of poplar addition on tar formation during the co-pyrolysis of fat coal and poplar at high temperature

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