Online experiments and modelling with a detailed reaction scheme of single particle biomass pyrolysis

Anca-Couce, Andrés; Sommersacher, Peter; Scharler, Robert

doi:10.1016/j.jaap.2017.07.008

Cited by 74 publications

(80 citation statements)

References 33 publications

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“…Each cylinder was pyrolysed individually in a Single Particle Reactor (BEST GmbH, Graz, Austria). The details about the construction of the reactor can be found in the publications of Sommersacher et al [55,56] and its simplified scheme is presented in the work of Anca-Couce et al [57]. Pyrolysis of a single sample type was performed at five temperatures: 300°C, 400°C, 500°C, 700°C and 900°C, each in six repetitions.…”

Section: Pyrolysis Experimentsmentioning

confidence: 99%

“…Additionally, the lowest three temperatures were selected to indirectly investigate the influence of selective degradation of biomass constituents (hemicellulose, cellulose and lignin) [58]. The procedure of pyrolysis was based on the work of Anca-Couce et al [57]. Initially, the reactor was heated up to the appropriate temperature (350°C, 480°C, 570°C, 820°C and 1050°C respectively) prior to the introduction of a feedstock cylindrical particle.…”

Section: Pyrolysis Experimentsmentioning

confidence: 99%

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Tailoring of the pore structures of wood pyrolysis chars for potential use in energy storage applications

et al. 2021

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Char obtained from biomass pyrolysis is an eco-friendly porous carbon, which has potential use as a material for electrodes in supercapacitors. For that application, a high microporous specific surface area (SSA) is desired, as it relates to the accessible surface for an applied electrolyte. Currently, the incomplete understanding of the relation between porosity development and production parameters hinders the production of tailor-made, bio-based pyrochars for use as electrodes. Additionally, there is a problem with the low reliability in assessing textual properties for bio-based pyrochars by gas adsorption. To address the aforementioned problems, beech wood cylinders of two different lengths, with and without pre-treatment with citric acid were pyrolysed at temperatures of 300-900°C and analysed by gas adsorption. The pyrolyzed chars were characterised with adsorption with N 2 and CO 2 to assess the influence of production parameters on the textual properties. The new approach in processing the gas adsorption data used in this study demonstrated the required consistency in assessing the micro-and mesoporosity. The SSA of the chars rose monotonically in the investigated range of pyrolysis temperatures. The pre-treatment with citric acid led to an enhanced SSA, and the length of the cylinders correlated with a reduced SSA. With pyrolysis at 900°C, the micro-SSAs of samples with 10 mm increased by on average 717 ± 32 m 2 /g. The trends among the investigated parameters and the textual properties were rationalized and provide a sound basis for further studies of tailor-made bio-based pyrochars as electrode materials in supercapacitors.

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Section: Pyrolysis Experimentsmentioning

confidence: 99%

Section: Pyrolysis Experimentsmentioning

confidence: 99%

Tailoring of the pore structures of wood pyrolysis chars for potential use in energy storage applications

et al. 2021

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“…In addition, Ranzi et al do not report the experimental conditions under which the model was developed, and claim that it is only a first approximation, with more work needed to improve reproducibility. 157 Anca-Couce extended the Ranzi scheme to account for high charring biomass species like those with catalytic ash content and a trapped gas mechanism to represent delayed release of these species. 79,158 The authors advise using semi-empirical "X factors" in the mechanism to account for the impact of ash, such that high charring materials have higher X values than low charring materials as shown in Table 2.…”

Section: Chemical Reaction Schemes To Describe the Effect Of Temperatmentioning

confidence: 99%

Progress in understanding the four dominant intra-particle phenomena of lignocellulose pyrolysis: chemical reactions, heat transfer, mass transfer, and phase change

et al. 2019

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“…At higher pyrolysis temperatures (700–850°C), the permanent pyrogas yield is significantly increased; consequently, lower biochar and bio‐oil yields will be obtained (Anca‐Couce, Sommersacher, & Scharler, ; Sadaka & Boateng, ; Tripathi, Sahu, & Ganesan, ). The resulting biochar contains graphite‐like carbon (instead of amorphous carbon), which increases its recalcitrance, for example in soil (Budai et al, ; Keiluweit, Nico, Johnson, & Kleber, ).…”

Section: Carbon Balances and Optimized Pyrolysis Parameters For Pyccsmentioning

confidence: 99%

Pyrogenic carbon capture and storage

et al. 2018

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The growth of biomass is considered the most efficient method currently available to extract carbon dioxide from the atmosphere. However, biomass carbon is easily degraded by microorganisms releasing it in the form of greenhouse gases back to the atmosphere. If biomass is pyrolyzed, the organic carbon is converted into solid (biochar), liquid (bio‐oil), and gaseous (permanent pyrogas) carbonaceous products. During the last decade, biochar has been discussed as a promising option to improve soil fertility and sequester carbon, although the carbon efficiency of the thermal conversion of biomass into biochar is in the range of 30%–50% only. So far, the liquid and gaseous pyrolysis products were mainly considered for combustion, though they can equally be processed into recalcitrant forms suitable for carbon sequestration. In this review, we show that pyrolytic carbon capture and storage (PyCCS) can aspire for carbon sequestration efficiencies of >70%, which is shown to be an important threshold to allow PyCCS to become a relevant negative emission technology. Prolonged residence times of pyrogenic carbon can be generated (a) within the terrestrial biosphere including the agricultural use of biochar; (b) within advanced bio‐based materials as long as they are not oxidized (biochar, bio‐oil); and (c) within suitable geological deposits (bio‐oil and CO2 from permanent pyrogas oxidation). While pathway (c) would need major carbon taxes or similar governmental incentives to become a realistic option, pathways (a) and (b) create added economic value and could at least partly be implemented without other financial incentives. Pyrolysis technology is already well established, biochar sequestration and bio‐oil sequestration in soils, respectively biomaterials, do not present ecological hazards, and global scale‐up appears feasible within a time frame of 10–30 years. Thus, PyCCS could evolve into a decisive tool for global carbon governance, serving climate change mitigation and the sustainable development goals simultaneously.

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Online experiments and modelling with a detailed reaction scheme of single particle biomass pyrolysis

Cited by 74 publications

References 33 publications

Tailoring of the pore structures of wood pyrolysis chars for potential use in energy storage applications

Tailoring of the pore structures of wood pyrolysis chars for potential use in energy storage applications

Progress in understanding the four dominant intra-particle phenomena of lignocellulose pyrolysis: chemical reactions, heat transfer, mass transfer, and phase change

Pyrogenic carbon capture and storage

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