Rapid pyrolysis of biochar prepared from slow and fast pyrolysis: The effects of particle residence time on char properties

Shen, Qiqing; Wu, Hongwei

doi:10.1016/j.proci.2022.07.119

Cited by 21 publications

(2 citation statements)

References 17 publications

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“…Characterized by temperatures ranging from 300 to 700 • C and longer residence times, slow pyrolysis predominantly produces biochar. These extended residence times can foster secondary reactions, refine the biochar structure, and influence its P retention potential [59]. This method is favorable when producing higher biochar outputs that excel in P adsorption, as demonstrated by Tenic et al [55].…”

Section: Advances In Pyrolysis Techniquesmentioning

confidence: 97%

Advancements in Biochar Modification for Enhanced Phosphorus Utilization in Agriculture

Ahmed,

Deng,

Wang

et al. 2024

Land

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The role of modified biochar in enhancing phosphorus (P) availability is gaining attention as an environmentally friendly approach to address soil P deficiency, a global agricultural challenge. Traditional phosphatic fertilizers, while essential for crop yield, are costly and environmentally detrimental owing to P fixation and leaching. Modified biochar presents a promising alternative with improved properties such as increased porosity, surface area, and cation exchange capacity. This review delves into the variability of biochar properties based on source and production methods and how these can be optimized for effective P adsorption. By adjusting properties such as pH levels and functional groups to align with the phosphate’s zero point of charge, we enhance biochar’s ability to adsorb and retain P, thereby increasing its bioavailability to plants. The integration of nanotechnology and advanced characterization techniques aids in understanding the structural nuances of biochar and its interactions with phosphorus. This approach offers multiple benefits: it enables farmers to use phosphorus more efficiently, reducing the need for traditional fertilizers and thereby minimizing environmental impacts, such as greenhouse gas emissions and P leaching. This review also identifies existing research gaps and future opportunities for further biochar modifications. These findings emphasize the significant potential of modified biochar in sustainable agriculture.

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Section: Advances In Pyrolysis Techniquesmentioning

confidence: 97%

Advancements in Biochar Modification for Enhanced Phosphorus Utilization in Agriculture

Ahmed,

Deng,

Wang

et al. 2024

Land

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“…The data in Figures 7 and 8 reveals that there are two key distinctions between the ECCS and NCCS cases: the first is the value of the heat rates, and the second is the profile pattern. The descriptive data in Table 5 indicates that the heats rate in both cases is less than 10 o C/min, implies that the test was carried out in the range of the slow-pyrolysis process, which is favorable for produces biochar Zhao et al, 2019;Shen & Wu, 2023;Abdullha et al, 2023). In both cases, there has discernible variation in the heat rate at the upper area of the stove (@TU), which is confirmed by the ANOVA test data in Table 6 (P = 0.048).…”

Section: Heat Rate Analysismentioning

confidence: 99%

Effect of the non-uniform combustion core shape on the biochar production characteristics of the household biomass gasifier stove

Chaiyalap,

Chai-ngam,

Saengprajak

et al. 2023

Int. J. Renew. Energy Dev.

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The global demand for biochar in agricultural and carbon sequestration applications is increasing; nevertheless, biochar production using the 50-liter household biomass gasifier stove (50L-HBGS) in Thailand found major issues that need to be improved. The objective of this study was to study the effects of the airflow in the non-uniform combustion core shape (NCCS) on the biochar production characteristic of the 50L-HBGS. The new design of the NCCS was constructed and studied to replace the existing combustion core shape (ECCS) at Mahasarakham University. The height, air inlet, and air outlet diameters of the NCCS were designed at 45, 24, and 11.4 cm, respectively. The NCCS with 21 holes of the pyrolysis gas outlet, a diameter of 4 mm for each, was integrated into the 50L-HBGS and performed comparative tests to the ECCS using 9 kg of bamboo wood chunks in three consecutive experiments. The airflow and the combustion behavior were studied through the stove temperature profiles, which were recorded every 5 minutes using a digital data logger. The biochar products were studied using the scanning electron microscope (SEM) with the energy dispersive x-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and the proximate analysis technique. The study indicated that the 50L-HBGS with the NCCS made significantly improved the airflow rates in the combustion core, resulting in better continuous burning during the ignition state than with the ECCS. Moreover, the pyrolysis temperatures were significantly improved, it was provided temperatures during the pyrolysis process reached higher than 500 oC, resulting in the liquid tar being removed and no unburned wood chunks remaining at the end. The characterization result demonstrated that the 50L-HBGS with the NCCS had created biochar within a range of micropore and macrospore sizes and high fixed carbon content, which could be advantageously used for different agricultural and carbon sequestration applications.

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Application of Biochar-Based Catalysts for Soil and Water Pollution Control

Jin,

Zhou,

et al. 2024

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Rapid pyrolysis of biochar prepared from slow and fast pyrolysis: The effects of particle residence time on char properties

Cited by 21 publications

References 17 publications

Advancements in Biochar Modification for Enhanced Phosphorus Utilization in Agriculture

Advancements in Biochar Modification for Enhanced Phosphorus Utilization in Agriculture

Effect of the non-uniform combustion core shape on the biochar production characteristics of the household biomass gasifier stove

Application of Biochar-Based Catalysts for Soil and Water Pollution Control

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