Physico-chemical properties and gasification reactivity of co-pyrolysis char from different rank of coal blended with lignocellulosic biomass: Effects of the cellulose

Wu, Zhiqiang; Wang, Shuzhong; Luo, Zhengyuan; Chen, Lin; Meng, Haiyu; Zhao, Jun

doi:10.1016/j.biortech.2017.03.121

Cited by 45 publications

(36 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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 . The XRD parameters of prepared samples are calculated and listed in Table , according to the Bragg's equation (Equation ) and Scherrer equation (Equation ):

d_{002} = λ / 2sin θ_{002}

L_{a} = K_{2} λ / β_{100} \cos θ_{100}

L_{c} = K_{1} λ / β_{002} \cos θ_{002}

where, d 002 represents the inter‐planer distance; L a is average crystallite size; L c is in‐plane crystallite size; θ 002 , θ 100 are the diffraction peak of (002) and (100), respectively; β 002 , β 100 are the half‐maximum width of diffraction peak (002) and (100), respectively; λ is diffraction wavelength.…”

Section: Resultsmentioning

confidence: 99%

“…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. 33 The XRD parameters of prepared samples are calculated and listed in Table 3, according to the Bragg's equation (Equation (7)) and Scherrer equation (Equation (8) and (9)) [34][35][36][37] :…”

Section: Activation Mechanism Analysismentioning

confidence: 99%

See 1 more Smart Citation

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

Quan

Gao

2020

Int J Energy Res

View full text Add to dashboard Cite

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.

show abstract

d_{002} = λ / 2sin θ_{002}

L_{a} = K_{2} λ / β_{100} \cos θ_{100}

L_{c} = K_{1} λ / β_{002} \cos θ_{002}

Section: Resultsmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…The hysteresis loops of the biochar belong to the type H4, indicating the rich microporous structures. The adsorption-desorption isotherms of the both biochar samples showed a sharp knee at P/P 0 around 0.01, indicating the narrow pore diameter distribution [24]. The adsorption capacity of biochar samples was quantified by the amount of adsorbed nitrogen [25].…”

Section: Effect Of Blending Methods On Co-pyrolysis and Co-gasificationmentioning

confidence: 99%

Interaction and Kinetics Study of the Co-Gasification of High-solid Anaerobic Digestate and Lignite

et al. 2020

View full text Add to dashboard Cite

This study aims at investigating the interaction and kinetics behavior of the co-gasification of digestate and lignite. The co-pyrolysis performances of digestate and lignite blended by dry process were better than that blended by wet process, while the wet-blending process could improve the performance in co-gasification stage because of the larger pore diameter and pore volume. When anaerobic digestion (AD) time was 40 days, the synergistic interaction between digestate and lignite were the most remarkable based on the results of thermogravimetric analysis (TG) and the experiments in the lab-scale downdraft fixed bed gasifier. Kinetics study showed that the increase of AD time and the addition of digestate in lignite decreased the activation energy of the co-gasification reaction.

show abstract

“…Some researchers found that given its high H/C ratio, biomass can provide a high amount of hydrogen for the pyrolysis process . Moreover, the alkali metal contents in biomass hold catalytic effects on coal pyrolysis, which may accelerate pyrolysis reaction . Therefore, biomass can be used as a hydrogen donor during co‐pyrolysis process and is considered an efficient solution to environmental issues and dependence on high‐rank coal .…”

Section: Introductionmentioning

confidence: 99%

“…10,13 Moreover, the alkali metal contents in biomass hold catalytic effects on coal pyrolysis, which may accelerate pyrolysis reaction. 14 Therefore, biomass can be used as a hydrogen donor during co-pyrolysis process and is considered an efficient solution to environmental issues and dependence on high-rank coal. 15 Many studies on coal and biomass co-pyrolysis have been recently conducted.…”

Section: Introductionmentioning

confidence: 99%

Assessment of low‐rank coal and biomass co‐pyrolysis system coupled with gasification

Lyu

Cao²,

Zhang

et al. 2019

Int J Energy Res

View full text Add to dashboard Cite

Summary To utilize low‐rank coal and biomass in a highly efficient and environmental‐friendly manner, a co‐pyrolysis system coupled with char gasification is investigated. This system has five main units, namely, the drying and mixing, pyrolysis, cooling and separation, combustion, and gasification units, which are simulated by ASPEN plus based on experimental data. Results show that 37% of the pyrolysis char is burned to supply heat for pyrolysis and drying processes based on cascade utilization of heat energy, whereas the rest is sent to a gasifier. The sensitivity analysis is performed to investigate the impacts of steam and O2 injection on gas composition, gasification temperature, carbon conversion efficiency, heating value of gas during gasification, and gas production efficiency. The fractions of H2, CH4, CO, and CO2 demonstrate diverse variation tendencies with an increasing equivalence ratio and steam‐to‐char (S/C) ratio. However, carbon conversion efficiency reaches its peak of 99.91% when the equivalence ratio is approximately 4 regardless of S/C ratio. An equivalence ratio of 4 and S/C ratio of 0.15 are used as decent examples to calculate the mass balance and to simulate the overall system. Results show that 1000 kg/h coal and 500 kg/h biomass can produce 285.83 m3/h pyrolysis gas and 2580.78 m3/h gasification gas with low heating values of 8.20 and 9.746 MJ/m3, respectively.

show abstract

Physico-chemical properties and gasification reactivity of co-pyrolysis char from different rank of coal blended with lignocellulosic biomass: Effects of the cellulose

Cited by 45 publications

References 37 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

Interaction and Kinetics Study of the Co-Gasification of High-solid Anaerobic Digestate and Lignite

Assessment of low‐rank coal and biomass co‐pyrolysis system coupled with gasification

Contact Info

Product

Resources

About

Physico-chemical properties and gasification reactivity of co-pyrolysis char from different rank of coal blended with lignocellulosic biomass: Effects of the cellulose

Cited by 45 publications

References 37 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

Interaction and Kinetics Study of the Co-Gasification of High-solid Anaerobic Digestate and Lignite

Assessment of low‐rank coal and biomass co‐pyrolysis system coupled with gasification

Contact Info

Product

Resources

About

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