Influence of biochar pyrolysis temperature and post-treatment on the uptake of mercury from flue gas

Klasson, K. Thomas; Boihem, L. L.; Uchimiya, Minori; Lima, Isabel M.

doi:10.1016/j.fuproc.2014.01.034

Cited by 48 publications

(14 citation statements)

References 26 publications

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“…To reduce the ash content in the PC and to increase its surface area, the PC was washed with 0.1 M HCl and then was rinsed with DW until the filtrate had a pH value of around 7. Finally, the PC was dried at 105°C for at least 24 hours 27 …”

Section: Methodsmentioning

confidence: 99%

Thermal treatment versus hydrothermal carbonization: How to synthesize nitrogen‐enriched carbon materials for energy storage applications?

Alhnidi

Straten

Nicolae

et al. 2021

Intl J of Energy Research

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The thermal treatment of an activated carbon/chars with a nitrogen precursor is not a sustainable nor an efficient method for the incorporation of N into the carbon structure. This study proposes the use of hydrothermal carbonization (HTC) as an environmentally friendly method for the incorporation of N into the bulk of carbon materials. The authors propose the following sequence for the synthesis of Nenriched carbon materials (NCM) for energy storage applications: HTC of the N precursor and biomass ! activation of N-hydrochar (N-HC). To investigate the proposed method, HTCs of spent coffee grounds (SCG) with N precursors (urea and alanine) were conducted at 220 C for 5 hours. The resulted N-HCs were subjected to a mild thermal activation via pyrolysis at 600 C for 2 hours. The results showed that HTC enhances the incorporation of N into the carbon matrix via many reactions, for example, the Maillard reaction (MR) or the Mannich reaction, which may accompany the formation of HC via the solved-intermediate pathway or the solid-to-solid pathway, respectively. However, adjusting some parameters before HTC, for example, the concentration of the N precursor and the pH value of the slurry is important to avoid a significant reduction in the N-HC yield. The proposed method led to the synthesis of NCM with a N content of 10.3wt% The X-ray photoelectron spectroscopy (XPS) confirmed the incorporation of N into the bulk of NCM and showed a significant increase in the content of heterocyclic N compounds (pyridinic N, pyrrolic N, and graphitic N) in the NCM. The incorporation of N via the proposed method significantly improved the electrochemical properties of NCM as the values of the specific capacitance and the electrical conductivity in the NCM increased by five times and four times, respectively.

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Section: Methodsmentioning

confidence: 99%

Thermal treatment versus hydrothermal carbonization: How to synthesize nitrogen‐enriched carbon materials for energy storage applications?

Alhnidi

Straten

Nicolae

et al. 2021

Intl J of Energy Research

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“…The thermal upgrade of biomass can be divided into three main methods: pyrolysis, carbonization, and torrefaction ( Poudel et al., 2015 ; Wilk and Magdziarz, 2017 ; Chen et al., 2017 ). The produced biochar can be utlized in a wide range of applications, such as soil amendment and remediation ( Beiyuan et al., 2020 ; O'Connor et al., 2018 ; Shen et al., 2018 ; Kumar et al., 2021 ), sewage treatment ( Palansooriya et al., 2020 ; Wu et al., 2020 ; Zhang et al., 2020 ), contaminated air treatment ( Klasson et al., 2014 ; Wang et al., 2020a , 2020b ) and climate change mitigation ( Dissanayake et al., 2019 ; Igalavithana et al., 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of domestic sewage sludge: influence of operational conditions on the product yields using factorial design

Al-Mrayat

Al-Hamaiedeh

El-Hasan

et al. 2022

Heliyon

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“…Even the post-treatment methods have great impacts on the biochar yield and properties. For example, heating at 105 • C helped remove polycyclic aromatic hydrocarbons (PAHs) and other volatile organic hydrophobics remaining in biochar [57] while water washing reduced the soluble salts and organic toxics [57,58]. Cooling biochar right after carbonization using steam as practiced in many commercial biochar plants drastically increases the biochar SSA.…”

Section: The Right Biochar Sourcementioning

confidence: 99%

The 3R Principles for Applying Biochar to Improve Soil Health

Guo

2020

Soil Systems

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Amending soil with biochar is a promising approach to persistently improve soil health and promote crop growth. The efficacy of soil biochar amendment, however, is soil specific, biochar dependent, and influenced by the biochar application programs. To maximize the benefits of biochar application, this paper proposes the 3R principles for applying biochar to soils: right biochar source, right application rate, and right placement in soil. The quality of biochar as a soil amendment varies significantly with the feedstock and the production conditions. Biochar products capable of everlastingly sustaining soil health are those with high stable organic carbon (OC) content and high water- and nutrient-holding capacities that are manufactured from uncontaminated biomass materials. Acidic, coarse-textured, highly leached soils respond remarkably more to biochar amendment than other types of soils. Soil amendment with particular biochars at as low as 0.1 mass% (equivalent to 2 Mg ha−1) may enhance the seasonal crop productivity. To achieve the evident, long-term soil health improvement effects, wood- and crop residue-derived biochars should be applied to soil at one time or cumulatively 2–5 mass% and manure-derived biochars at 1–3 mass% soil. Optimal amendment rates of particular biochar soil systems should be prescreened to ensure the pH of newly treated soils is less than 7.5 and the electrical conductivity (EC) below 2.7 dS m−1 (in 1:1 soil/water slurry). To maximize the soil health benefits while minimizing the erosion risk, biochar amendment should be implemented through broadcasting granular biochar in moistened conditions or in compost mixtures to cropland under low-wind weather followed by thorough and uniform incorporation into the 0–15 cm soil layer. Biochars are generally low in plant macronutrients and cannot serve as a major nutrient source (especially N) to plants. Combined chemical fertilization is necessary to realize the synergic beneficial effects of biochar amendment.

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Influence of biochar pyrolysis temperature and post-treatment on the uptake of mercury from flue gas

Cited by 48 publications

References 26 publications

Thermal treatment versus hydrothermal carbonization: How to synthesize nitrogen‐enriched carbon materials for energy storage applications?

Thermal treatment versus hydrothermal carbonization: How to synthesize nitrogen‐enriched carbon materials for energy storage applications?

Pyrolysis of domestic sewage sludge: influence of operational conditions on the product yields using factorial design

The 3R Principles for Applying Biochar to Improve Soil Health

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