Thermal behavior and the evolution of char structure during co-pyrolysis of platanus wood blends with different rank coals from northern China

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

doi:10.1016/j.fuel.2015.06.023

Cited by 80 publications

(47 citation statements)

References 35 publications

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“…As indicated in Figure , the nitrogen uptake of the biomass carbon sample increases sharply after activated by KOH, adsorption capacities of N 2 were enhanced by the activation temperature and the activation temperature shifts the isotherm upward. According to the IUPAC classification, the adsorption‐desorption isotherm of BC‐700 is found to be type III isotherm, signifying BC‐700 to be microporous or almost nonporous with weak interaction of adsorbent‐adsorbate. The adsorption/desorption curves of ABC‐700 and ABC‐800 belongs to type I isotherm, generally exhibiting an increase in the adsorption at low P/P 0 values, with barely defined knee and a very long plateau that extend to P/P≈1.0.…”

Section: Resultsmentioning

confidence: 99%

“…Nowadays, biomass has been extensively studied for its clean and renewable properties. At present, the thermochemical conversion of biomass is one of the most effective means, due to the superior adaptability of raw materials and various products such as syngas, liquid fuel and activated carbon . Activated porous carbon derived from biomass has been attracted more and more attention.…”

Section: Introductionmentioning

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%

Section: Introductionmentioning

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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“…It can be seen that the TGA plot had three stages of mass loss: (1) from room temperature to 200°C, the weight loss (i.e. <2%) occurred, which could be attributed to the dehydration and the escape of adsorbed organic small molecules in the raw coal ; (2) from 320 to 600°C, the weight loss was significantly large, up to 70%, with the weight loss peak at 460°C, which could be attributed to thermal degradation of volatile matter of the coal, such as coal gas, coal tar ; (3) from 600 to 1000°C, the weight loss was relatively small, which was due to secondary cracking reactions, mainly including cracking and condensation reactions . Due to the combined effect of the two reactions, the weight loss rate curve of the coal became smoothly steady.…”

Section: Resultsmentioning

confidence: 99%

Preparation and desulfurization performance of pyrolusite modified activated coke

Liu

Huang

Jiang

et al. 2016

Env Prog and Sustain Energy

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In this study, pyrolusite modified columnar activated coke (AC‐P) was prepared through blending coal chars with an additive (i.e. pyrolusite). The effect of preparation process on the properties of obtained activated coke and the effects of operating conditions on desulfurization performance of AC‐P were investigated. The results show that the blending ratio of coal tar and molding pressure could affect the iodine value and drum strength of prepared activated coke. The orthogonal experiment results show that the optimal activation conditions for activated coke were 950°C of activation temperature, 60 min of activation time, and 0.5 of MH2O/MC. When pyrolusite was blended into activated coke, the product yield, iodine value, and desulfurization performance of all AC‐P samples increased significantly. The optimal desulfurization operating conditions were: SO2 concentration at 2000 ppmv, bed temperature at 80°C, O2 content at 8%, water vapor content at 10%, and space velocity at 600 h−1. The results demonstrate that the AC‐P is a kind of very promising adsorbent/catalyst in industrial flue gas desulfurization application due to its low cost and good desulfurization capacity. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1679–1686, 2016

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“…[33][34][35][36] The higher I D3 /I G+D2+D3 value indicated the more amorphous carbon structure in tested samples. Thus, the D 1 band/G band area ratio (I D1 /I G ) and the G band/integrated bands area ratio (I G /I All ) were commonly used as quantitative parameters to assess the order degree of carbon structure of the tested samples.…”

Section: Carbon Structurementioning

confidence: 95%

A study on high‐temperature co‐gasification reactivity characteristics and kinetics analysis of Hami coal and its liquefaction residue

Guo

Huang

Gong

et al. 2019

Asia-Pacific J Chem Eng

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In this study, the rapid pyrolysis chars of Hami bituminous coal and its liquefaction residue were prepared using a high-frequency furnace. A thermogravimetric analyzer was used to investigate the gasification reactivity and determine the mixing ratio of coal and its liquefaction residue. In addition, a scanning electron microscope, a physisorption analyzer, and a laser raman spectrometer were used to characterize the physicochemical properties of samples. Furthermore, kinetics analysis using the isoconversional method was conducted. The results showed that the gasification reactivity was affected by gasification temperature, pore structure, and carbon structure. When the gasification temperature increased to 1300°C, the gasification reactivity of the liquefaction residue char was close to that of coal char. From the gasification reactivity point of view, the liquefaction residue could be utilized as a raw material in entrained-flow gasification. The mixing ratio of the raw coal to the liquefaction residue was preferably 2:1. The research on activation energy showed that the gasification process belonged to pore diffusion control in the range of temperatures investigated. Specifically, there was a synergistic effect between the coal char and the liquefaction residue char in co-gasification, which was beneficial to the gasification reaction. study on high-temperature cogasification reactivity characteristics and kinetics analysis of Hami coal and its liquefaction residue. Asia-Pac J Chem Eng. 2020;15:e2376. https://doi.

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Thermal behavior and the evolution of char structure during co-pyrolysis of platanus wood blends with different rank coals from northern China

Cited by 80 publications

References 35 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

Preparation and desulfurization performance of pyrolusite modified activated coke

A study on high‐temperature co‐gasification reactivity characteristics and kinetics analysis of Hami coal and its liquefaction residue

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Thermal behavior and the evolution of char structure during co-pyrolysis of platanus wood blends with different rank coals from northern China

Cited by 80 publications

References 35 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

Preparation and desulfurization performance of pyrolusite modified activated coke

A study on high‐temperature co‐gasification reactivity characteristics and kinetics analysis of Hami coal and its liquefaction residue

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Product

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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