Effect of minerals and binders on particulate matter emission from biomass pellets combustion

Yang, Wei; Zhu, Youjian; Cheng, Wei; Sang, Huiying; Xu, Hanshen; Yang, Haiping; Chen, Hanping

doi:10.1016/j.apenergy.2018.01.093

Cited by 60 publications

(23 citation statements)

References 63 publications

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“…The maximum PM 0.1 and PM 1 reduction rates are 48.5 and 44.43%, respectively, which is much higher than the previous results. 25 Our previous work showed that the maximum PM 1 reduction rate for a Si−Al-based additive was 18.7% under the same operating conditions. 25 The results indicate that the addition of ADP is a promising approach to reduce PM 1 emissions during the combustion of agricultural biomass.…”

Section: Energy and Fuelsmentioning

confidence: 89%

“…The collected XRD spectrum was analyzed using HighScore Plus software with International Centre for Diffraction Data (ICDD) card. 25,31 3. RESULTS 3.1.…”

Section: Methodsmentioning

confidence: 99%

“…The reduction rate was far less than that from pulverized coal combustion as a result of the low reaction rate between kaolin and potassium salts (e.g., KCl and K 2 SO 4 ) in the lowtemperature combustion mode (∼900 °C). 25 Wang et al 26 also found that the K conversion rate of KCl and K 2 SO 4 by kaolin was only 20−30% at 800−900 °C, which was obviously lower than the equilibrium values. Therefore, a more effective additive should be searched for biomass combustion with respect to PM emission reduction.…”

Section: Introductionmentioning

confidence: 96%

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P-Based Additive for Reducing Fine Particulate Matter Emissions during Agricultural Biomass Combustion

et al. 2019

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To understand the influence of P-containing compounds on particulate matter (PM) emissions from the combustion of agricultural residues, the combustion of cornstalk was performed with the addition of a phosphorus-based additive, namely, ammonium dihydrogen phosphate (NH4H2PO4), in a fixed-bed combustion system. Simultaneously the ash samples, including PM collected by a Dekati low-pressure impactor (DLPI) and residual ash, were analyzed with variant analytical techniques. It was found that NH4H2PO4 addition significantly reduced PM0.1 and PM0.1–1 yields but increased PM1–10 yields. The maximum PM0.1 and PM1 reduction efficiency can reach up to 50% at an optimal P/K molar ratio equal to 1. Meanwhile, the addition of NH4H2PO4 to cornstalk changed the chemical composition of PM1 from being dominated by KCl and KOH/K2CO3 with a small amount of K2SO4 to a system dominated by KPO3 and KCl with a small amount of K2SO4. Simultaneously, the possible PM1 reduction mechanism was proposed. In addition, the residual ash after combustion was rich in K- and P-containing species, indicating a potential utilization as a fertilizer. It showed that the addition of NH4H2PO4 is a promising approach to reduce PM1 emissions during the combustion of agricultural biomass.

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Section: Energy and Fuelsmentioning

confidence: 89%

“…The collected XRD spectrum was analyzed using HighScore Plus software with International Centre for Diffraction Data (ICDD) card. 25,31 3. RESULTS 3.1.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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P-Based Additive for Reducing Fine Particulate Matter Emissions during Agricultural Biomass Combustion

et al. 2019

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“…However, the large-scale application of biomass fuel was restricted due to the low density and high hydrophilicity of biomass, which causes the problem of transportation and storage. Therefore, pelletization of biomass was used to improve the fuel density [3, 4]. However, the high energy consumption, the high hydrophilicity and low bulk density of the pellets were also intractable problems for biomass pelletization.…”

Section: Introductionmentioning

confidence: 99%

Improvement of corn stover fuel properties via hydrothermal carbonization combined with surfactant

Ren

Sun

et al. 2019

Biotechnol Biofuels

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Background Biomass fuel has been used to supply heat or crude materials in industry to replace the traditional fossil fuel which was one of the chief causes of climate warming. However, the large-scale utilization of biomass fuel was restricted due to the low density and high hydrophilicity of biomass, which causes the problem of transportation and storage. Therefore, pelletization of biomass was used to improve its fuel density. At present, the biomass pellet was widely used to supply heat, gas or electricity generation via gasification, which supplied clean and sustainable energy for industry. However, the energy consumption during pelletization and high hydrophilicity of pellets were still the problem for the large-scale application of biomass pellet. In this study, hydrothermal carbonization and surfactant played the role of permeation, adsorption and wetting in the solution, which was expected to improve the fuel properties and pelletization effectivity of corn stover. Results In the article, surfactant (PEG400, Span80, SDBS) was chosen to be combined with wet torrefaction to overcome the drawbacks and improve the pelletization and combustion properties of Corn stover (CS). Especially, hydrothermal carbonization (HTC) combined with surfactant improves the yield of solid products and reduces the ash content of solid product, which was beneficial for reducing the ashes of furnace during gasification. Meanwhile, surfactant promotes the formation of pseudo-lignin and the absorption for oil with low O and high C during HTC, which improves the energy density of solid product. Furthermore, the oil in solid product plays the role of lubricant and binder, which reduces the negative effect of high energy consumption, low bulk density and weak pellets strength caused by HTC during pelletization. HTC combined with surfactant improved the hydrophobicity of pellet as well as grindability due to the modification of solid product. Moreover, surfactant combined with HTC improved the combustion characteristic of solid product such as ignition and burning temperature as well as kinetic parameters due to the bio-oil absorbed and the improvement of surface and porosity. Conclusions The study supplied a new, less-energy intensive and effective method to improve the pelletization and combustion properties of corn stover via hydrothermal carbonization combined with surfactant, and provided a promising alternative fuel from corn stover .

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“…The third purpose is to reduce particulate matter emissions during coal combustion, which contain high levels of alkali metals. Na and K have been proven to contribute greatly to ultrafine particulate matters formation by vaporization and condensation during the combustion of high Na coal and biomass, respectively [ 17 , 18 ]. Sun et al added 3% raw kaolinite and modified kaolinite into pulverized coal and reduced by about 16% and 40% PM 0.2 respectively during combustion in drop tube furnace [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Typical Gaseous Semi-Volatile Metals Adsorption by Meta-Kaolinite: A DFT Study

Chen

Liu

et al. 2018

IJERPH

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Kaolinite can be used as in-furnace adsorbent to capture gaseous semi-volatile metals during combustion, incineration, or gasification processes for the purposes of toxic metals emission control, ash deposition/slagging/corrosion inhibition, ultrafine particulate matter emission control, and so on. In this work, the adsorptions of typical heavy metals (Pb and Cd) and typical alkali metals (Na and K) by meta-kaolinite were investigated by the DFT calculation. The adsorption energies followed the sequence of NaOH-Si surface > KOH-Si surface > PbO-Al surface ≈ CdO-Al surface ≈ NaOH-Al surface > KOH-Al surface > NaCl-Al surface ≈ Na-Si surface > Na-Al surface > KCl-Al surface > Pb-Al surface > PbCl2-Al surface > CdCl2-Al surface ≈ K-Si surface ≈ PbCl-Al surface > K-Al surface > CdCl-Al surface > NaCl-Si surface > KCl-Si surface > Cd-Al surface. Si surface was found available to the adsorptions of Na, K, and their compounds, although it was invalid to the adsorptions of Pb, Cd, and their compounds. The interactions between adsorbates and surfaces were revealed. Furthermore, the discussion of combining with the experimental data was applied to the subject validity of calculation results and the effect of chlorine on adsorption and the effect of reducing atmosphere on adsorption.

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Effect of minerals and binders on particulate matter emission from biomass pellets combustion

Cited by 60 publications

References 63 publications

P-Based Additive for Reducing Fine Particulate Matter Emissions during Agricultural Biomass Combustion

P-Based Additive for Reducing Fine Particulate Matter Emissions during Agricultural Biomass Combustion

Improvement of corn stover fuel properties via hydrothermal carbonization combined with surfactant

Typical Gaseous Semi-Volatile Metals Adsorption by Meta-Kaolinite: A DFT Study

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