Optimization process of porous carbon derived from coconut shell: A novel preparation condition and investigation on pore surface roughness

Wang, Liangcai; Xie, Linen; Feng, Xin; Li, Xiang; Ma, Hongwen; Han, Guolin; Yang, Derui

doi:10.1016/j.diamond.2022.108854

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…Increasing the air intake duration and holding time produced biochar with increased porosity and a variety of pore shapes, as illustrated in Figure 5(b-i). This means that the coconut shell had more time to react with the air, resulting in the radical development of more pore structures due to the release of a large amount of volatiles [33]. This result was in agreement with the findings of the approximate analysis.…”

Section: Morphological Observationsupporting

confidence: 90%

“…Then, the decline in surface area was found when the holding time increased further. This was probably because of an over-development of the pore structures [33]. Another reason for this phenomenon was related to the reduction of adsorption sites due to the clogging of pores caused by the condensation of pyrolysis volatiles [17].…”

Section: Morphological Observationmentioning

confidence: 99%

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Feasibility study of coconut shell biochar production using community-scale biochar kiln

et al. 2023

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The enormous coconut shell waste from local farmers and manufacturers has caused negative environmental and economic impacts in Thailand. A low-cost, small-scale pyrolysis kiln comprised of a cylindrical tank, gas circulating pipes, a kiln stand, and a manual drum lever was constructed and used to produce biochar from coconut shells in this study. The air intake and holding times for the biochar production process were varied. The biochar yield was 30.67% to 36.22%, or 4.6 kg to 5.4 kg per day per unit. The biochar porosity and fixed carbon content increased as the air intake and holding times were increased. The BET surface areas were 7.54 m²∙g-1 to 63.17 m²∙g-1. The pH values of biochar were alkaline, in the range of 7.34 to 10.24. Therefore, biochar can be used as a soil amendment material. The Net Present Value (NPV), the Internal Rate of Return (IRR), and the payback period are 52,757 THB (1,459.79 USD), 18.71%, 4 years, 10 months, and 27 days, respectively. According to economic analysis, investing in coconut shell biochar production under optimal conditions using the developed kiln is acceptable and can be viewed as a potential approach to providing additional economic benefits for coconut-based enterprises and the Thai community.

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Section: Morphological Observationsupporting

confidence: 90%

Section: Morphological Observationmentioning

confidence: 99%

Feasibility study of coconut shell biochar production using community-scale biochar kiln

et al. 2023

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“…As an example, Cen and co-workers produced rice straw-based biochars by pyrolysis, and the specific surface area of these rice straw-based biochars was in the range from ~68 m 2 /g to ~99 m 2 /g [ 7 ]. Similarly, Wang et al [ 8 ] obtained coconut shell-based biochar with a specific surface area of 160 m 2 /g by pyrolysis of coconut shells. The specific surface areas recorded for the mentioned biochars were below 200 m 2 /g, which makes them under-valorized.…”

Section: Introductionmentioning

confidence: 99%

Co-Pyrolysis for Pine Sawdust with Potassium Chloride: Insight into Interactions and Assisting Biochar Graphitization

Xie

Wang

2023

Materials

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This effort aimed to explore the activation and catalytic graphitization mechanisms of non-toxic salts in converting biomass to biochar from the perspective of pyrolysis kinetics using renewable biomass as feedstock. Consequently, thermogravimetric analysis (TGA) was used to monitor the thermal behaviors of the pine sawdust (PS) and PS/KCl blends. The model-free integration methods and master plots were used to obtain the activation energy (E) values and reaction models, respectively. Further, the pre-exponential factor (A), enthalpy (ΔH), Gibbs free energy (ΔG), entropy (ΔS), and graphitization were evaluated. When the KCl content was above 50%, the presence of KCl decreased the resistance to biochar deposition. In addition, the differences in the dominant reaction mechanisms of the samples were not significant at low (α ≤ 0.5) and high (α ≥ 0.5) conversion rates. Interestingly, the lnA value showed a linearly positive correlation with the E values. The PS and PS/KCl blends possessed positive ΔG and ΔH values, and KCl was able to assist biochar graphitization. Encouragingly, the co-pyrolysis of the PS/KCl blends allows us to target-tune the yield of the three-phase product during biomass pyrolysis.

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Synthesis of hollow micro-mesoporous nitrogen-doped carbon nanoparticles for enhanced CO2 capture

Liu,

Xie,

et al. 2024

J Sol-Gel Sci Technol

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Optimization process of porous carbon derived from coconut shell: A novel preparation condition and investigation on pore surface roughness

Cited by 5 publications

References 34 publications

Feasibility study of coconut shell biochar production using community-scale biochar kiln

Feasibility study of coconut shell biochar production using community-scale biochar kiln

Co-Pyrolysis for Pine Sawdust with Potassium Chloride: Insight into Interactions and Assisting Biochar Graphitization

Synthesis of hollow micro-mesoporous nitrogen-doped carbon nanoparticles for enhanced CO2 capture

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