Novel carbon-rich additives preparation by degradative solvent extraction of biomass wastes for coke-making

Zhu, Xianqing; Li, Xian; Xiao, Li; Zhang, Xiao Yong; Tong, Shan; Wu, Chao; Ashida, Ryo; Liu, Wenqiang; Miura, Kouichi; Yao, Hong

doi:10.1016/j.biortech.2016.01.105

Cited by 41 publications

(26 citation statements)

References 26 publications

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“…It can be seen in Figure 1 that 2 wt.% addition of SP produces reductions in Gieseler maximum fluidity of 36 and 55 % for C1 and C2 respectively. In a previous work the greatest reduction was obtained with a high volatile coal by adding torrefied oak sawdust [3]. Other authors have also found by means of SAOS rheometry that pine sawdust even in additions of only 2 wt.% has a deleterious effect on coal fluidity [11].…”

Section: Effect Of Biomass On Coal Thermoplastic Propertiesmentioning

confidence: 87%

“…The coals used in the present research work are bituminous high rank and have a low fluidity with values of 233 and 34 ddpm for C1 and C2, respectively. As reported previously, the use of sawdust as an additive to coal produces a decrease in coal fluidity [3,4]. In this study the variation in fluidity was tested considering its importance in relation to coking pressure and to see whether there is any relation between fluidity and devolatilization and the permeability of the plastic phase to the flow of gas.…”

Section: Effect Of Biomass On Coal Thermoplastic Propertiesmentioning

confidence: 87%

“…The inclusion of biomass in coking blends has been increasingly investigated in recent years with a view to widening the range of alternative raw materials that can be included in coking blends [1][2][3][4][5][6]. One of the reasons for using biomass is the general concern about the generation of greenhouse gases resulting from the use of fossil fuels and the high consumption of coal in the steel industry [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Effect of sawdust addition on coking pressure produced by two low vol bituminous coals

Florentino-Madiedo

Casal

Díaz-Faes

et al. 2017

Journal of Analytical and Applied Pyrolysis

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Two high-rank bituminous coals and three sawdusts of different origin were selected to study the effect of biomass on coking pressure. The effect of the biomass on the thermoplastic properties of the coals was assessed by means of the Gieseler test. In addition, the effect of the biomass on the thermal decomposition of the coals was studied by means of thermogravimetric analysis together with the modification of the permeability of the coal plastic phase. The individual coals and the blends were carbonized in a 17 kg movable wall oven; the coking pressure developed was measured and the quality of the resulting coke was assessed. It was found that the sawdust reduced coking pressure, especially in the case of the coal that developed the highest coking pressure. This effect was attributed to the modification of the permeability of the plastic phase to gas flow. It was concluded that although the addition of sawdust produces a decrease in coking pressure, additions should be limited to small amounts to avoid excessive deterioration of the quality of the product.

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Section: Effect Of Biomass On Coal Thermoplastic Propertiesmentioning

confidence: 87%

Section: Effect Of Biomass On Coal Thermoplastic Propertiesmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of sawdust addition on coking pressure produced by two low vol bituminous coals

Florentino-Madiedo

Casal

Díaz-Faes

et al. 2017

Journal of Analytical and Applied Pyrolysis

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“…Therefore, the resistance of low-CRI coke to fine generation and accumulation is higher than that of high-CRI coke in blast furnaces. It is believed that the low-CRI coke can better support the burden in blast furnaces than high-CRI coke [5,6]. Blast furnace production declines and the fuel ratio increases when the coke CRI increases [7,8].…”

Section: Introductionmentioning

confidence: 99%

A comprehensive investigation of the reaction behaviorial features of coke with different CRIs in the simulated cohesive zone of a blast furnace

Tian

Zhou

et al. 2021

PLoS ONE

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The reaction characteristics and mechanism of coke with different coke reactivity indices (CRIs) in the high-temperature zone of a blast furnace should be fully understood to correctly evaluate the coke quality and optimize ironmaking. In this work, low-CRI coke (coke A) and high-CRI coke (coke B) were charged into a thermogravimetric analyzer to separately study their microstructural changes, gasification characteristics, and reaction mechanism under simulated cohesive zone conditions in a blast furnace. The results show that both coke A and coke B underwent pyrolysis, polycondensation, and graphitization during the heat treatment. The pyrolysis, polycondensation, gasification speed, and dissolution speed rates of coke B were higher than those of coke A. Direct and indirect reduction between sinter and coke occurred in the cohesive zone and had different stages. The consumption rate of coke B was faster than that of coke A during the coke–sinter reduction. The carbon molecules of coke A must absorb more energy to break away from the skeleton than those of coke B.

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“…Pretreatment that results in the removal of water from biomass is necessary prior to its use in any thermal conversion processes. The degradative solvent extraction (DSE) method has been used successfully to dewater and upgrade low-rank coals [11][12][13][14][15] and biomass [16][17][18] under mild conditions. In DSE, low-rank coal and biomass are treated in a nonpolar solvent in a batch autoclave reactor at around 350 • C under pressure.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Conversion Pathways in Degradative Solvent Extraction of Rice Straw by Using Liquid Membrane-FTIR Spectroscopy

et al. 2019

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Degradative solvent extraction (DSE) is effective in both dewatering and upgrading biomass wastes through the selective removal of oxygen functional groups. However, this conversion mechanism has yet to be elucidated. Here, liquid membrane-FTIR spectroscopy was utilized to examine the main liquid product (Solvent-soluble) without sample modification. Rice straw (RS) and 1-methylnaphthalene (as a non-hydrogen donor solvent) were used as materials, and measurements were performed at treatment temperatures of 200, 250, 300, and 350 °C for 0 min, and at 350 °C for 60 min. The Solvent-soluble spectra were quantitatively analyzed, and changes in the oxygen-containing functional groups and hydrogen bonds at each temperature were used to characterize the DSE mechanism. It was determined that the DSE reaction process can be divided into three stages. During the first stage, 200–300 °C (0 min), oxygen was removed via dehydration, and aromaticity was observed. In the second stage, 300–350 °C (0 min), deoxygenation reactions involving dehydration and decarboxylation were followed by reactions for aromatization. For the third stage, 350 °C (0–60 min), further aromatization and dehydration reactions were observed. Intramolecular reactions are indicated as the predominant mechanism for dehydration in RS DSE, and the final product is composed of smaller molecular compounds.

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Novel carbon-rich additives preparation by degradative solvent extraction of biomass wastes for coke-making

Cited by 41 publications

References 26 publications

Effect of sawdust addition on coking pressure produced by two low vol bituminous coals

Effect of sawdust addition on coking pressure produced by two low vol bituminous coals

A comprehensive investigation of the reaction behaviorial features of coke with different CRIs in the simulated cohesive zone of a blast furnace

Investigation on Conversion Pathways in Degradative Solvent Extraction of Rice Straw by Using Liquid Membrane-FTIR Spectroscopy

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