Structure evolution and gasification characteristic analysis on co-pyrolysis char from lignocellulosic biomass and two ranks of coal: Effect of wheat straw

Wu, Zhiqiang; Ma, Chen; Jiang, Zhao; Luo, Zhengyuan

doi:10.1016/j.fuel.2018.11.015

Cited by 92 publications

(54 citation statements)

References 65 publications

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“…The diffraction peak (002) characterizes the degree of spatial parallelization and azimuthal orientation of the aromatic layer in the microcrystalline structure. The peak is “high and narrow”, indicating better orientation . The diffraction peak (100) represents the size of the aromatic layer.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture

Quan

Gao

2020

Int J Energy Res

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Summary Biomass based carbon has captured more and more attention because it is environmentally friendly and has properties of low cost and ideal sustainability. In this study, three kinds of activated biomass carbons (ie, ABC‐700, ABC‐800 and ABC‐900) were first carbonized through pine sawdust pyrolysis and then activated using KOH under three different activation temperatures (ie, 700°C, 800°C and 900°C). The structure properties of the prepared activated biomass carbons were characterized by N2‐adsorption/desorption, SEM, TEM, XRD, Raman, XPS, TG and ultimate analysis. To clarify the activation mechanism, the gas products produced during KOH activation process were measured online with an ETG gas analyzer. The performance of the activated biomass carbons derived from pine sawdust for supercapacitor and CO2 capture was then evaluated. The predominant gas products during the activation process are H2 and CO. It indicates that the porous structure was created by using an enhanced etching reaction between carbon atoms and KOH. An increment of the activation temperature from 700 to 900°C results in the increase of surface area (from 1728.66 to 2330.89 m2/g) and total pore volume (from 0.671 to 1.914 cm3/g). Among the three samples, ABC‐900 exhibits the maximal specific capacitance of 175.6 F·g−1 and high energy density of 24.39 Wh·kg−1 at the 0.5 A·g−1. And the ABC‐700 shows the maximal CO2 capture capacity of 4.21 mmol/g and high selectivity of CO2 over N2 at 298 K and 1 bar. In addition, ABC‐700 also has excellent stability and reproducibility after 15 times adsorption‐desorption cycles. The unexceptionable electrochemical performance and adsorption capacity of the biomass‐carbons show its broad application prospects in the field of supercapacitors and CO2 capture.

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Section: Resultsmentioning

confidence: 99%

“…The peak is "high and narrow", indicating better orientation. 32 The diffraction peak (100) represents the size of the aromatic layer. When the peak is "high and narrow", it indicates that the diameter of the aromatic layer is large, that is, the degree of aromatic nuclear polymerization is high.…”

Section: Activation Mechanism Analysismentioning

confidence: 99%

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture

Quan

Gao

2020

Int J Energy Res

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“…Therefore, it is of great significance to explore a novel gasification technology to optimize the allocation of resources and promote gasification efficiency of anthracite. Catalytic coal gasification technology and the co-gasification technology of coal and other carbonaceous materials have shown prominent effect on the gasification reaction rate of coal sample, which provides effective ways to promote the low gasification reactivity of anthracite (Kopyscinski et al 2014;Wu et al 2019). To achieve industrial application of co-gasification technology, it is necessary to make an in-depth understanding of the interaction mechanism between anthracite and additives.…”

Section: Introductionmentioning

confidence: 99%

“…Although the biomass has the merits of abundant source and CO 2 neutral, the disadvantages containing the high moisture content, the low energy density, inferior flowability and grindability inevitably lead to some technical and economic challenges for storage, handle, and conversion of biomass (Carpenter et al 2014;Sermyagina et al 2016;Zhang et al 2016a, b). Recently, the co-pyrolysis characteristic of biomass and coal and the subsequent co-gasification reactivity have been widely studied to reveal the cogasification mechanism, and then provide the theory basis of coal-biomass co-gasification (Qin et al 2017;Wei et al 2017a;Wu et al 2019). The addition of biomass would affect the evolution of pore structure and increase the disordered degree of char during co-pyrolysis, which was also favorable for the subsequent gasification reaction (Wu et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Influence of different biomass ash additive on anthracite pyrolysis process and char gasification reactivity

Yang

Liu

et al. 2020

Int J Coal Sci Technol

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Catalytic coal gasification technology shows prominent advantages in enhancing coal gasification reactivity and is restrained by the cost of catalyst. Two typical biomass ash additions, corn stalk ash (CSA, high K–Na and low Si) and poplar sawdust ash (PSA, high K–Ca and high Si), were employed to study the influence of biomass ash on pyrolysis process and char gasification reactivity of the typical anthracite. Microstructure characteristics of the char samples were examined by X-ray diffraction (XRD). Based on isothermal char-CO2 gasification experiments, the influence of biomass ash on reactivity of anthracite char was determined using thermogravimetric analyzer. Furthermore, structural parameters were correlated with different reactivity parameters to illustrate the crucial factor on the gasification reactivity varied with char reaction stages. The results indicate that both CSA and PSA additives hinder the growth of adjacent basic structural units in a vertical direction of the carbon structure, and then slow down the graphitization process of the anthracite during pyrolysis. The inhibition effect is more prominent with the increasing of biomass ash. In addition, the gasification reactivity of anthracite char is significantly promoted, which could be mainly attributed to the abundant active AAEM (especially K and Na) contents of biomass ash and a lower graphitization degree of mixed chars. Higher K and Na contents illustrate that the CSA has more remarkable promotion effect on char gasification reactivity than PSA, in accordance with the inhibition effect on the order degree of anthracite char. The stacking layer number could reasonably act as a rough indicator for evaluating the gasification reactivity of the char samples.

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“…Pyrolysis, gasification and liquefaction techniques are currently the main thermochemical conversion processes for biomass (Wu et al, 2018). Among them, biomass gasification is an effective way to produce syngas and generate electricity energy (Wu et al, 2019b). In the technique of gasification, a large series of reactions (baking, pyrolysis and reduction et al) occur between macromolecular organic matter and gasifying agent, which eventually converts into syngas containing H 2 , CO, CO 2 , CH 4 , and other small molecule non-condensable gases (Ahmad et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Steam gasification of land, coastal zone and marine biomass by thermal gravimetric analyzer and a free-fall tubular gasifier: Biochars reactivity and hydrogen-rich syngas production

Qiao

Chen

Qin

et al. 2019

Bioresource Technology

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The steam gasification properties and kinetics, products distribution and syngas composition derived from land, coastal zone and marine biomass have been studied by TGA and free-fall tubular gasifier. Volume model, shrinking core model and random pore model were applied to describe the reaction kinetics. The influence of temperature and fuel types on steam gasification in a free-fall tubular gasifier were clarified simultaneously. Results showed that gasification reactivity of reed (Re) and Sargassum horneri (Sh) chars were better than that of corn stalks (Cs) char, which mostly determined by its carbonaceous structure and the varying inorganic contents. RPM model was applied successfully to corresponding to the experimental data. Bench scale reactor test found that the steam gasification of Re gave the largest amount of gaseous product than Sh and Cs, while no liquidus formation in Sh. An increase in the temperature during gasification process boosted produced sharply total gas production yield, more yield of H 2 and CO 2 and less CO and CH 4 from different biomass.

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Structure evolution and gasification characteristic analysis on co-pyrolysis char from lignocellulosic biomass and two ranks of coal: Effect of wheat straw

Cited by 92 publications

References 65 publications

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture

Influence of different biomass ash additive on anthracite pyrolysis process and char gasification reactivity

Steam gasification of land, coastal zone and marine biomass by thermal gravimetric analyzer and a free-fall tubular gasifier: Biochars reactivity and hydrogen-rich syngas production

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Structure evolution and gasification characteristic analysis on co-pyrolysis char from lignocellulosic biomass and two ranks of coal: Effect of wheat straw

Cited by 92 publications

References 65 publications

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO 2 capture

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO 2 capture

Influence of different biomass ash additive on anthracite pyrolysis process and char gasification reactivity

Steam gasification of land, coastal zone and marine biomass by thermal gravimetric analyzer and a free-fall tubular gasifier: Biochars reactivity and hydrogen-rich syngas production

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Product

Resources

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Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture

Preparation of activated biomass carbon from pine sawdust for supercapacitor and CO ₂ capture