Pore characteristics and fractal properties of biochar obtained from the pyrolysis of coarse wood in a fluidized-bed reactor

Chen, Jia; Dongdong, Fang; Duan, Feng

doi:10.1016/j.apenergy.2018.02.179

Cited by 40 publications

(14 citation statements)

References 48 publications

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“…Biomass pyrolysis yields a range of solid, liquid and gaseous outcomes with applications as biofuels [4], source of chemicals [5], etc. Biochar, the solid product of biomass pyrolysis, is an important substance with many environmental [6] and agricultural benefits [7], which has gained a lot of attention [8]. A large volume of research has been conducted and published on many aspects of biochar applications in agriculture, environmental management [9], and carbon storage [10].…”

Section: Introductionmentioning

confidence: 99%

Country-level potential of carbon sequestration and environmental benefits by utilizing crop residues for biochar implementation

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Country-level potential of carbon sequestration and environmental benefits by utilizing crop residues for biochar implementation

et al. 2021

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“…Converting the biomass or surplus crop residues into biochar has proven to be a promising way of decreasing the emission of carbon dioxide gases into the atmosphere while simultaneously increasing soil fertility. In recent years, solid biochar has been termed "black gold" and has attracted a remarkable amount of attention at the international level [6]. The end products obtained from pyrolysis have the potential to be used as an alternative source of renewable energy [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on biochar from groundnut shell in a continuous production system

Pawar

Panwar

2020

Biomass Conv. Bioref.

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The burning of crop residue results in numerous environmental issues and also affects human beings. Crop residue has the potential to produce considerable energy and can be converted into biochar via thermochemical routes; this conversion helps in the management and handling of biomass. This study deals with the development of a system for the continuous production of biochar by carbonization of groundnut shells at different temperatures. The developed system is capable of converting different kinds of crop residue into biochar. The carbonization chamber was heated using an industrial burner, and its thermal performance was elevated at 400, 450, and 500°C using groundnut shell as feedstock, and the amount of time the feedstock resided in the burner was limited to 4 min. The mass yields and heating value of the produced biochar were found to be highest at 400°C. Therefore, the crop residue converted into biochar and the chemical properties were assessed for this temperature. Biochar conversion efficiency was recorded at about 30%. The oxygen-to-carbon (O:C) and hydrogen-to-carbon (H:C) ratios were found to be 0.08 and 0.40 respectively. The energy required to produce 1 kg of biochar ranged from 3.70 to 4.64 MJ. The benefit-cost ratio and a payback period of the developed system were calculated to be about 1.94 and 11 months, respectively. The internal rate of return was estimated at about 121%. In the present study, the impact of carbonization upon the composition of lignocelluloses and its thermal behavior was also assessed with the help of a thermogravimetric analyzer (TGA).

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“…32 Fractal theory has therefore been introduced to describe the pore structure of solid samples and has been used to study the pore structure in sludge pyrolysis, 33 modified Ca-based sorbents, 34 and biochar. 35 In these studies, the calculated dimension D satisfied the general condition 2 < D < 3. For porous solids, the fractal dimension D = 2 represents a smooth surface, and D = 3 represents a rugged surface that tends to fill the space in which it resides.…”

Section: Introductionmentioning

confidence: 70%

“…The Hausdorff dimension ( D ) is commonly used to describe the fractal features of porous structures . Fractal theory has therefore been introduced to describe the pore structure of solid samples and has been used to study the pore structure in sludge pyrolysis, modified Ca‐based sorbents, and biochar . In these studies, the calculated dimension D satisfied the general condition 2 < D < 3.…”

Section: Introductionmentioning

confidence: 99%

Sulfation, pore, and fractal properties of hydrated spent calcium magnesium acetate from calcium‐based looping

Zhang

Duan

2019

Greenhouse Gases

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Hydration of the spent calcium‐based sorbent from calcium‐looping can improve its inadequate pore characteristics. The hydrated sorbent can be used for desulfurization before calcium‐based looping, which decreases the SO2 concentration in the flue gas entering the calcium‐based looping and also decreases the cost of CO2 capture. The effects of hydration time, hydration temperature, and liquid‐solid ratio on the reactivation performance of a hydrated spent calcium‐based sorbent were studied using spent calcium magnesium acetate (CMA) in this study. Fractal analysis based on the pore structure data of the hydrated sorbents was also conducted, and the relationship between the fractal dimension and the desulfurization performance of the hydrated spent sorbents was also investigated. The results showed that the sulfation conversion rate of the hydrated spent CMA decreased slowly at first, and then increased with hydration time. The conversion rate also increased with the hydration temperature but it decreased with the liquid‐solid ratio. The maximum sulfation conversion of the hydrated spent CMA under the optimized conditions was 68.0%, which approached that of fresh CMA. Compared to that of spent CMA, the sulfation conversion increased by 53.3%. The spent CMA consisted mainly of mesopores and macropores. After hydration, the volumes of both types of pores increased. However, the mesopore percentage decreased, while the macropore percentage increased. The hydrated spent CMA had obvious fractal characteristics. There was an optimum range for the fractal dimension of the samples, 2.31 < D < 2.35, at which the sulfation conversion was maximized. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Pore characteristics and fractal properties of biochar obtained from the pyrolysis of coarse wood in a fluidized-bed reactor

Cited by 40 publications

References 48 publications

Country-level potential of carbon sequestration and environmental benefits by utilizing crop residues for biochar implementation

Country-level potential of carbon sequestration and environmental benefits by utilizing crop residues for biochar implementation

Experimental investigation on biochar from groundnut shell in a continuous production system

Sulfation, pore, and fractal properties of hydrated spent calcium magnesium acetate from calcium‐based looping

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