Catalytic and non-catalytic synergistic effects and their individual contributions to improved combustion performance of coal/biomass blends

Oladejo, Jumoke; Adegbite, Stephen; Gao, Xiang; Liu, Hao; Wu, Tao

doi:10.1016/j.apenergy.2017.11.052

Cited by 34 publications

(7 citation statements)

References 46 publications

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“…The results of proximate, elemental and composition analyses are listed in Error! Reference source not found., the procedure can be find in our previous studies [22][23][24][25]. The compositions of protein, lipid and carbohydrate in biomass were determined by Kjeldahl method (BS EN ISO 20483:2013), Soxhlet extraction (GB/T 5009. , and the difference calculated (GB/Z 21922-2008), respectively.…”

Section: Characterization Of Algae Primary Model Compoundsmentioning

confidence: 99%

Kinetic study of the pyrolysis of microalgae under nitrogen and CO2 atmosphere

et al. 2020

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In this study, three primary components of algae (lipid, carbohydrate and protein) and one microalgae (spirulina) were pyrolyzed in a thermogravimetric analyzer (TGA) under nitrogen and CO2 atmosphere at four heating rates. It was found that protein decomposed first, which was followed by carbohydrate and then lipid. Kinetic study revealed that ovalbumin (protein) had the lowest activation energy of ~70 kJ/mol for the initiation of pyrolysis. Oil droplet showed higher activation energy of 266.5 kJ/mol in CO2 atmosphere, which suggests that algal lipid is more difficult to decompose in CO2 atmosphere. However, for the pyrolysis of cellulose (carbohydrate), the activation energy (~310 kJ/mol) was similar under two different gas atmospheres tested. This study showed that CO2 atmosphere favors the pyrolysis of algae with high protein content and low lipid content, since the existence of CO2 promotes the cracking of VOCs as well as the reaction between VOCs and CO2.

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Section: Characterization Of Algae Primary Model Compoundsmentioning

confidence: 99%

Kinetic study of the pyrolysis of microalgae under nitrogen and CO2 atmosphere

et al. 2020

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“…In order to make full use of this biomass energy source, it is important to analyze the combustion performance of the biomass pellets. Industrial analysis components including carbon content, volatile matter content and ash content are all important factors affecting biomass combustion performance [6][7][8][9]. The calorific value is a direct indicator of biomass combustion performance [10,11].…”

Section: Introductionmentioning

confidence: 99%

Rapid Determination of Wood and Rice Husk Pellets’ Proximate Analysis and Heating Value

et al. 2020

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Biomass pellets are a potential renewable and clean energy source. With the advantages of perfect combustion performance and easy storage and transport, biomass pellets have gradually replaced fossil fuels and become widely used. Rapid and accurate determination of biomass pellets’ quality is critical to efficient energy use. Laser-induced breakdown spectroscopy (LIBS) combined with chemometric methods were utilized. The gross calorific value (CV) and ash content (Ash), volatile matter (VM) and fixed carbon (FC) were firstly measured and analyzed. LIBS spectra and their corresponding elements of biomass pellet samples were analyzed. Three quantitative analysis models for quality indexes including partial least-squares regression (PLSR), least squares-support vector machines (LS-SVM), extreme learning machines (ELM) were further built. All models performed well, especially the LS-SVM model which obtained the best determination results, with all R2 values over 0.95. Concurrently, the modeling performance of ash was slightly better than that of the other three quality indexes, which further confirmed the feasibility of using relevant elements to predict biomass quality indexes. The overall results indicated that LIBS coupled with suitable chemometrics could be an alternative promising method to determine quality indexes of biomass pellets and further improve energy utilization by using biomass materials with better quality.

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“…This corroborates the burnout temperatures obtained in the coal and RW-LTA blends in Figure 5b. Interestingly, the promoting influence of biomass minerals on the burnout of the fuel blends is lower than that observed in the ash blends, which could be an indication of the presence of competition on synergy between the organic and inorganic constituents of biomass on the coal during co-combustion and hence inhibition as previously explained by other researchers [37].…”

Section: Impacts Of Lignocellulosic Constituents On Co-combustionmentioning

confidence: 54%

Investigation on the interactions among lignocellulosic constituents and minerals of biomass and their influences on co-firing

Shi

Oladejo

Jin

et al. 2019

Energy

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The influences of biomass constituents, such as lignocellulosic components and minerals, on the combustion of coal/biomass blends are of significant importance in co-firing due to its potential impacts on ignition, flame stability and burnout. In this research, combustion characteristics of pure lignocellulosic elements, Rosewood, Mengxi coal and their blends were studied in detail. The effect of minerals in Rosewood on combustion of biomass/Mengxi coal blends was investigated which revealed reductions in the ignition (≤ 20 °C), peak (≤ 12 °C) and burnout temperatures ( ≤ 6 °C). The results also demonstrate the existence of interactions between lignocellulosic constituents in the model biomass, which is dominated by the interactions of cellulose-derived products with xylan and lignin respectively which led to ~8% reduction in char oxidation temperature. The minerals in biomass showed different impacts at different stages of the combustion process, such as inhibition effect during the devolatilization stage, and promotive synergy (mainly due to calcium) on ignition and char oxidation.

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Catalytic and non-catalytic synergistic effects and their individual contributions to improved combustion performance of coal/biomass blends

Cited by 34 publications

References 46 publications

Kinetic study of the pyrolysis of microalgae under nitrogen and CO2 atmosphere

Kinetic study of the pyrolysis of microalgae under nitrogen and CO2 atmosphere

Rapid Determination of Wood and Rice Husk Pellets’ Proximate Analysis and Heating Value

Investigation on the interactions among lignocellulosic constituents and minerals of biomass and their influences on co-firing

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