Physical and Combustion Indices of Thermally Treated Cornhusk and Sawdust Briquettes for Heating Applications in Nigeria

Akogun, Opeyemi A.; Waheed, M.A.; Ismaila, Salami Olasunkanmi; Dairo, O. U.

doi:10.1080/15440478.2020.1764445

Cited by 19 publications

(39 citation statements)

References 36 publications

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“…23 A fuel with CI values ranging from 12.56 to 23.03 MJ/kg is appropriate for combustion. 20,23,32 The value of CI is lowest at 10/90 blending ratio when CH/CP was torrefied at 300 C. Similar research showed that through torrefaction, the CI of waste wood, logging residue, palm kernel shell, and bagasse was reduced. 23 Also the value of CI reduced from 82.51 to 16.04 MJ/kg for sugarcane bagasse 32 while CI decreased from 68.5 to 45.33 MJ/kg for coconut shell.…”

Section: Proximate Analysis and Caloric Value Of Ch/cp Briquettementioning

confidence: 60%

“…The results of VM and FC for torrefied CH/CP briquette at 300°C is similar to that reported in the work of Chen et al 30 for torrefied bagasse (45.9% and 42%) and rice husk (34.1% and 42.2%). The VM and FC obtained by Akogun et al 20 for torrefied cornhusk and sawdust briquette blends ranged between 47.7% to 58.4% and 33.1% to 40.4%, respectively. Lu et al 37 observed that the VM and FC for torrefied oil palm fiber are 41.2% and 44.3% while the corresponding values for torrefied bamboo obtained by Rousett et al 38 are 58.8% and 37.8%.…”

Section: Resultsmentioning

confidence: 86%

“…The raw and torrefied briquettes were analyzed for moisture content (MC), volatile matter (VM), ash content (AC), and fixed carbon (FC) in wet and dry basis according to the procedure of ASTM D1762–84 28 . In coal engines, fuels having fuel ratio (FR) values in the range 0.5 to 2.0, combustibility index (CI) values ranging between 12 and 23 MJ/kg; and VI values of at least 14.5 MJ/kg are recommended for application 20,23,24 . The Equations ) were used to determine the combustion indices.

italicFR = \frac{{italicFC}_{italicdb}}{{italicVM}_{italicdb}}

italicCI = \frac{{italicCV}_{italicdb}}{105 italicFR} \times ((), 115 - {AC}_{db})

italicVI = ([], \frac{{italicCV}_{italicdb} - 0.338 {italicFC}_{italicdb}}{{italicVM}_{italicdb} + {italicMC}_{italicdb}}) \times 100

…”

Section: Methodsmentioning

confidence: 99%

“…The adopted experimental design facilitated the study of the interaction between the independent variable and the physical and combustion indices. Twenty (20) experiments were required in total while each experiment was carried out thrice and the average value presented.…”

Section: Experimental Designmentioning

confidence: 99%

“…It is necessary to increase the torrefaction temperature, reduce the VM, and then increase the FC in order to improve the combustion indices of fuel samples. 20,24 Moreover, statistical evaluation of the experimental data through ANOVA revealed that torrefaction conditions significantly influenced the FR, VI, and CI of CH/CP briquettes blends. The combustion indices are therefore useful indicators for the evaluation of solid fuel quality from torrefied CH and CP briquette for co-firing in a coal combustion chamber.…”

Section: Proximate Analysis and Caloric Value Of Ch/cp Briquettementioning

confidence: 99%

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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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