Combustion performance and emissions from torrefied and water washed biomass using a kg-scale burner

Chen, Chia-Yang; Chen, Wei‐Hsin; Hung, Chung Hsien

doi:10.1016/j.jhazmat.2020.123468

Cited by 16 publications

(3 citation statements)

References 51 publications

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“…(1) pre-wash alone [3][4][5][6] (2) pre-wash and torrefaction [7][8][9][10][11][12][13], (3) pre-wash, torrefaction and pyrolysis [15][16][17], (4) pre-wash and pyrolysis [18][19][20][21][22][23], (5) pyrolysis and post-wash [24], (6) torrefaction and post-wash [25,26], and (7) our study. Most studies focus on pre-washing of biomass prior to torrefaction and/or pyrolysis, with only few studies investigating postwashing of biomass.…”

Section: Introductionmentioning

confidence: 76%

“…The conventional process of sunflower husk torrefaction takes up to 1 h [28]. The water washing process also requires an average of 1 h [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In addition, after washing with water, the biomass must be dried before torrefaction [5].…”

Section: Treatment Biomasses Reference Treatment Steps and Conditions...mentioning

confidence: 99%

“…Treatment of biomass by water washing for the improvement of fuel properties has been proposed in different configurations, either as sole treatment [4][5][6][7], or combined with Processes 2023, 11, 2486 2 of 16 torrefaction and/or pyrolysis [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] for the removal of problematic elements, such as alkali metal chlorides or sulfur compounds, aiming at the reduction of corrosion, slagging and fouling of the boiler's surface, resulting from biomass combustion [27]. Previous research works on the topic of biomass washing as a pre-or post-treatment for the improvement of the torrefaction and pyrolysis processes, as well as fuel properties of biomass, in perspective with our study, are presented in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Preliminary Results of Innovative Two-Stage Torrefaction Technology Applied for Thermochemical Treatment of Sunflower Husk

Nebyvaev,

Klimov,

Ryzhenkov

et al. 2023

Processes

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This article proposes an innovative two-stage technology for biomass torrefaction generating high-quality biochar, more specifically biocoal, as solid fuel, and offering a promising solution to the challenges posed by the combustion of biomass. In particular, the higher quality of biochar as solid fuel reduces the build-up of unmanageable deposits on fired surfaces, as these deposits inhibit heat transfer and reduce the efficiency of biomass boilers. The proposed two-stage technology involves torrefaction in a hearth-type reactor at temperatures up to 250 °C, followed by a subsequent stage of cooling achieved through washing with water. The two-stage torrefaction technology is integrated within a vertical hearth reactor vessel composed of three superimposed trays serving for biomass input, torrefaction, and water washing combined with biomass cooling, respectively. Upon contact with torrefied biomass, cooling water turned into water vapor; hence, eliminating the requirement for subsequent biomass separation and drying. The system was tested on sunflower husk, and results showed a reduction in the content of problematic elements such as alkali metal chlorides or sulfur compounds in biochar ash, suggesting lower corrosion rates of convective heating surfaces of the boiler under ash sediments. It is hypothesized that, while water exited hot biomass in the form of water vapor instead of liquid water, as is typically the case in water-washing processes, a share of undesirable elements may still have been removed from biomass through vaporization, without necessitating any additional process for ash removal. Hence, the index values calculated according to the chemical analysis of biomass ash suggested that sunflower husk biochar (biocoal) resulting from the proposed two-stage torrefaction process may display fuel characteristics similar to biomasses whose combustion ash may form reduced levels of deposits on boiler surfaces. Therefore, the proposed technology holds the potential to improve solid fuel characteristics of biomass, targeting enhanced efficiency and sustainability of biomass-fired power plants.

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Section: Introductionmentioning

confidence: 76%

Section: Treatment Biomasses Reference Treatment Steps and Conditions...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preliminary Results of Innovative Two-Stage Torrefaction Technology Applied for Thermochemical Treatment of Sunflower Husk

Nebyvaev,

Klimov,

Ryzhenkov

et al. 2023

Processes

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Life cycle assessment and techno-economic analysis of sustainable bioenergy production: a review

Osman,

Fang,

Zhang

et al. 2024

Environ Chem Lett

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The global expansion of the bioenergy industry raises concerns, emphasizing the need for careful evaluation and sustainable management. To facilitate this, life cycle assessments beyond greenhouse gas emissions and energy balance are essential, along with the standardization of assessment methodologies to enable meaningful comparisons. Here, we review life cycle assessment, chemical aspects, and policy implication of bioenergy production. We discuss life cycle assessment in terms of concepts, methods, impacts, greenhouse gases, land use, water consumption, bioethanol, biodiesel, biogas, and techno-economic analysis. Chemical aspects comprise reaction processes and means to improve efficiency. Concerning policies, tools, and frameworks that encourage sustainable energy production are presented. We found that carbon dioxide removal ranges from 45 to 99% in various bioenergy processes. The review also emphasizes the importance of chemistry in advancing sustainable bioenergy production for a more sustainable and secure energy future.

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Insight into the recent advances of microwave pretreatment technologies for the conversion of lignocellulosic biomass into sustainable biofuel

et al. 2021

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Combustion performance and emissions from torrefied and water washed biomass using a kg-scale burner

Cited by 16 publications

References 51 publications

Preliminary Results of Innovative Two-Stage Torrefaction Technology Applied for Thermochemical Treatment of Sunflower Husk

Preliminary Results of Innovative Two-Stage Torrefaction Technology Applied for Thermochemical Treatment of Sunflower Husk

Life cycle assessment and techno-economic analysis of sustainable bioenergy production: a review

Insight into the recent advances of microwave pretreatment technologies for the conversion of lignocellulosic biomass into sustainable biofuel

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