Energy densification of sugarcane bagasse through torrefaction under minimized oxidative atmosphere

Conag, Angelique T.; Villahermosa, Jaye Earl R.; Cabatingan, Luis K.; Go, Alchris Woo

doi:10.1016/j.jece.2017.10.032

Cited by 46 publications

(31 citation statements)

References 17 publications

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“…Martinez et al 6 stated that fuel with high FC will burn more slowly with longer residence time. For instance, the values of 15.3% and 16.38% obtained for FC by Liu et al 31 and Conag et al 32 respectively are higher than that for CH and CP; this would present a slower burning rate than that of CH and CP. Nonetheless, the close difference between the FC of CP and CH could not be used to predict the biomass with slow burning rate even though the FC value of CP is higher than that of CH, hence, low VM value is the most important factor for slow burning of solid fuel.…”

Section: Characteristics Of Raw Ch and Cpmentioning

confidence: 82%

Quality enhancement of fuel briquette from cornhusk and cassava peel blends for co‐firing in coal thermal plant

Waheed

Akogun

2020

Int J Energy Res

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Summary This study was carried out to evaluate the physico‐mechanical and combustion indices of briquettes made from blends of cornhusk (CH) and cassava peel (CP). The CH and CP was torrefied at 200°C to 300°C and were mixed in the ratio 90/10 to 10/90 for briquette production using D‐optimal crossed design. The fuel application for co‐firing in coal engines was evaluated with fuel ratio, combustibility index and volatile ignitability. The findings revealed that the density, durability index and compressive strength of briquettes blend at 10/90 (CH/CP) torrefied at 300°C and water preconditioned, were respectively improved by 18.19, 2.98, and 32.25% compared with those for raw briquettes at 10/90 blend ratio. Furthermore, the fixed carbon and calorific value increased with the increase in the torrefaction temperature and time. The produced briquettes at the mixing ratios of 10/90 and 30/70 (CH/CP) torrefied at 300°C for at least 1 hour is sufficient for co‐firing in coal engines. The CH and CP wastes with low calorific value which are hitherto discarded could be used to produce briquettes with appropriate qualities attributes of alternative fuel source for heating applications.

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Section: Characteristics Of Raw Ch and Cpmentioning

confidence: 82%

Quality enhancement of fuel briquette from cornhusk and cassava peel blends for co‐firing in coal thermal plant

Waheed

Akogun

2020

Int J Energy Res

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“…They concluded that 290-320 • C is the required temperature range for optimum torrefaction of empty fruit bunches and 300-320 • C is the optimum range for palm kernel shell. In [85], the energy densification of sugarcane bagasse through torrefaction under minimized oxidative atmosphere was studied. The results indicated that torrefaction improved several fuel characteristics, making the sugarcane bagasse suitable for both domestic and industrial applications.…”

Section: Future Perspectives and Research Developmentsmentioning

confidence: 99%

Future Perspectives of Biomass Torrefaction: Review of the Current State-Of-The-Art and Research Development

et al. 2018

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Abstract:The growing search for alternative energy sources is not only due to the present shortage of non-renewable energy sources, but also due to their negative environmental impacts. Therefore, a lot of attention is drawn to the use of biomass as a renewable energy source. However, using biomass in its natural state has not proven to be an efficient technique, giving rise to a wide range of processing treatments that enhance the properties of biomass as an energy source. Torrefaction is a thermal process that enhances the properties of biomass through its thermal decomposition at temperatures between 200 and 300 • C. The torrefaction process is defined by several parameters, which also have impacts on the final quality of the torrefied biomass. The final quality is measured by considering parameters, such as humidity, heating value (HV), and grindability. Studies have focused on maximizing the torrefied biomass' quality using the best possible combination for the different parameters. The main objective of this article is to present new information regarding the conventional torrefaction process, as well as study the innovative techniques that have been in development for the improvement of the torrefied biomass qualities. With this study, conclusions were made regarding the importance of torrefaction in the energy field, after considering the economic status of this renewable resource. The importance of the torrefaction parameters on the final properties of torrefied biomass was also highly considered, as well as the importance of the reactor scales for the definition of ideal protocols.

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“…Consistent with TGA/DTG results, the FTIR analysis showed the reduction of the peak signal associated with O-H functional groups (3300–3500 cm −1 ). As discussed earlier, it may be due to the transformation of polar functional groups to non-polar as hydroxyl groups, which are responsible for the formation of hydrogen bonds with water, are removed making the torrefied biomass less hygroscopic (Conag et al, 2017). In this study, 69–88% moisture content was removed from the biomass as a result of torrefaction.…”

Section: Resultsmentioning

confidence: 99%

Impacts of non-oxidative torrefaction conditions on the fuel properties of indigenous biomass (bagasse)

et al. 2020

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Biomass is considered as the largest renewable energy source in the world. However, some of its inherent properties such as hygroscopicity, lower energy content, low mass density and bio-degradation on storage hinder its extensive application in energy generation processes. Torrefaction, a thermochemical process carried out at 200–300°C in a non-oxidative environment, can address these inherent problems of the biomass. In this work, torrefaction of bagasse was performed in a bench-scale tubular reactor at 250°C and 275°C with residence times of 30, 60 and 90 mins. The effects of torrefaction conditions on the elemental composition, mass yield, energy yield, oxygen/carbon (O/C) and hydrogen/carbon (H/C) ratios, higher heating values and structural composition were investigated and compared with the commercially available ‘Thar 6’ and ‘Tunnel C’ coal. Based on the targeted mass and energy yields of 80% and 90% respectively, the optimal process conditions turned out to be 250°C and 30 mins. Torrefaction of the bagasse conducted at 275°C and 90 min raised the carbon content in bagasse to 58.14% and resulted in a high heating value of 23.84 MJ/kg. The structural and thermal analysis of the torrefied bagasse indicates that the moisture, non-structural carbohydrates and hemicellulose were reduced, which induced the hydrophobicity in the bagasse and enhanced its energy value. These findings showed that torrefaction can be a sustainable pre-treatment process to improve the fuel and structural properties of biomass as a feedstock for energy generation processes.

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Energy densification of sugarcane bagasse through torrefaction under minimized oxidative atmosphere

Cited by 46 publications

References 17 publications

Quality enhancement of fuel briquette from cornhusk and cassava peel blends for co‐firing in coal thermal plant

Quality enhancement of fuel briquette from cornhusk and cassava peel blends for co‐firing in coal thermal plant

Future Perspectives of Biomass Torrefaction: Review of the Current State-Of-The-Art and Research Development

Impacts of non-oxidative torrefaction conditions on the fuel properties of indigenous biomass (bagasse)

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