Chemical fractionation of inorganic constituents in entrained flow gasification of slurry from straw pyrolysis

Mielke, Konrad; Kolb, Thomas; Müller, Michael

doi:10.1016/j.biombioe.2020.105732

Cited by 5 publications

(9 citation statements)

References 41 publications

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“…Typically, the reactor temperature can exit at 500 • C. If the production of bio-oil yield is about 50%, the char yield could be between 20% and 30% (Table 3) [10]. Such a reactor type has demerits, such as the lack of heat transfer between the biomass particles and gas, which usually is of high process temperature and results in increased gas flow rate and challenges associated with scaling-up [42].…”

Section: Entrained Flow Reactor (Efr)mentioning

confidence: 99%

“…To measure a specific temperature demand for pyrolysis, the biomass particles (specific to the fast pyrolysis process) are very sensitive. This is because it can be measured by either the reaction or reactor temperatures [42,[53][54][55]. Given the heat loss during the heat transfer from the reactor side wall to biomass particles, the temperature of the reactor usually appears higher than the reaction temperature, which can result in a paucity of completely pyrolyzed biomass particles.…”

Section: Temperature Effectsmentioning

confidence: 99%

“…For instance, the temperature of the reactor would correspondingly rise with the temperature of the process. Hence, authors of such scientific experiments should specify where the temperature was measured [42,[53][54][55]. Typically, increases in temperature within the pyrolysis process occur with gas production yield and with a corresponding lowering of the biochar production.…”

Section: Temperature Effectsmentioning

confidence: 99%

“…However, the maximum pyrolytic oil production can be achieved at the desired temperature range (480 to 550 • C). Additionally, the water content would be decreasing at 550 • C operating temperature (Figure 3) [42,[53][54][55]. [29].…”

Section: Temperature Effectsmentioning

confidence: 99%

“…The applications involving the areas of fuel, chemistry, power, and heat are summarized in Figure 5 [55]. The biochar characteristics at different temperatures and selected feedstock types are presented in Table 7 [37][38][39][40][41][42]. The feedstock type, pyrolysis temperature, and production conditions have a role to play towards these (physicochemical) properties.…”

Section: Biocharmentioning

confidence: 99%

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Opportunities and Challenges of High-Pressure Fast Pyrolysis of Biomass: A Review

et al. 2021

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Most pyrolysis reactors require small sizes of biomass particles to achieve high-quality products. Moreover, understanding the usefulness of high-pressure systems in pyrolysis is important, given the operational challenges they exhibit specific to various biomass materials. To actualize these aspects, the authors first checked previous reviews involving pyrolysis on different biomass and different conditions/situations with their respective objectives and subsections. From these already existing reviews, the team found that there has not been much emphasis on high-pressure fast pyrolysis and its potential in biomass conversion, showing that it is a novel direction in the pyrolysis technology development. Therefore, this review aims to shed more light on high-pressure fast pyrolysis, drawing from (a) classification of pyrolysis; (b) reactors used in fast pyrolysis; (c) heat transfer in pyrolysis feedstock; (d) fast pyrolysis parameters; (e) properties/yields of fast pyrolysis products; (f) high pressure on pyrolysis process; (g) catalyst types and their application; and (h) problems to overcome in the pyrolysis process. This review increases the understanding regarding high-pressure fast pyrolysis. An attempt has been made to demonstrate how high-pressure fast pyrolysis can bring about high-quality biomass conversion into new products. It has been shown that fluidized bed (bubbling and circulating) reactors are most suitable and profitable in terms of product yield. The high-pressure, especially combined with the fast-heating rate, may be more efficient and beneficial than working under ambient pressure. However, the challenges of pyrolysis on a technical scale appear to be associated with obtaining high product quality and yield. The direction of future work should focus on the design of high-pressure process reactors and material types that might have greater biomass promise, as well understanding the impact of pyrolysis technology on the various output products, especially those with lower energy demands. We propose that the increase of process pressure and biomass particle size decrease should be considered as variables for optimization.

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Section: Entrained Flow Reactor (Efr)mentioning

confidence: 99%

Section: Temperature Effectsmentioning

confidence: 99%

Section: Temperature Effectsmentioning

confidence: 99%

Section: Temperature Effectsmentioning

confidence: 99%

Section: Biocharmentioning

confidence: 99%

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Opportunities and Challenges of High-Pressure Fast Pyrolysis of Biomass: A Review

et al. 2021

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Crystal morphology data for viscosity modelling of fuel slags – Supplementation of spinel phase and validation by crystallisation in entrained flow gasifiers

Schupsky

Netter

et al. 2021

Fuel

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Review and Perspectives of Ash Slag Fluidity during Co-gasification of Industrial Solid Waste and Coal: Characteristics, Chemistry, Controlling Mechanisms, and Regulation

Zhang,

Song,

et al. 2024

Energy Fuels

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The stable fluidity of slag at a high temperature is crucial for the long-period operation of an entrained-flow gasifier. The diversity and difference of coal ash make it difficult to meet the requirements for stable slagging in a gasifier. Consequently, coal blending or adding flux has been employed in the industry to improve the fluidity of coal ash slag. As a carbon-containing matrix, industrial solid waste is a kind of energy substance. Utilizing existing industrial gasifiers to blend combustion of industrial solid waste can not only transform industrial solid waste into fuel but also improve the entrained-flow gasifier slagging performance using the unique ash chemical composition of industrial solid waste. Therefore, sorting out the effect of industrial solid waste on coal ash slag fluidity can not only clarify the regulating mechanism of coal ash slagging but also provide some theoretical support for the large-scale consumption of industrial solid waste. In this review, the effects of acid-and alkali-rich industrial solid wastes and coal co-gasification on coal ash slag fluidity were reviewed from the perspectives of ash melting characteristics and viscosity−temperature characteristics, and the effect mechanism of SiO 2 , Al 2 O 3 , SiO 2 / Al 2 O 3 (S/A), CaO, Fe 2 O 3 , and CaO−Fe 2 O 3 (Ca−Fe) compound fluxes on coal ash slag fluidity were elaborated from the viewpoint of mineral evolution and microstructure. Meanwhile, studies on the ash slag fluidity during the co-gasification of industrial solid waste and coal were prospected, which could afford theoretical guidance for the stable slagging of an entrained-flow gasifier and the resourceful treatment of industrial solid waste.

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Chemical fractionation of inorganic constituents in entrained flow gasification of slurry from straw pyrolysis

Cited by 5 publications

References 41 publications

Opportunities and Challenges of High-Pressure Fast Pyrolysis of Biomass: A Review

Opportunities and Challenges of High-Pressure Fast Pyrolysis of Biomass: A Review

Crystal morphology data for viscosity modelling of fuel slags – Supplementation of spinel phase and validation by crystallisation in entrained flow gasifiers

Review and Perspectives of Ash Slag Fluidity during Co-gasification of Industrial Solid Waste and Coal: Characteristics, Chemistry, Controlling Mechanisms, and Regulation

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