MICROWAVE IRRADIATION AS AN ALTERNATIVE PROCESS FOR BIODIESEL PRODUCTION USING MACAUBA OIL (Acrocomia aculeata)

Pereira, Marcos Roberto do Nascimento; Valério, Pedro Prates; Grande, Salvador Carlos; Andrade, Maria Helena Caño de

doi:10.18540/2446941602032016034

Cited by 2 publications

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“…Further, there is not an agreement either on which would be the best method for conversion to biodiesel (viz., supercritical method, enzyme hydroesterification, alkaline transesterification by homogeneous catalysis with microwave irradiation, cold-flow esterification and transesterification using different alcohols, etc.) (Pereira et al, 2016;Silva et al, 2016;Souza et al, 2016). entry of the harvested raw material -with high calorific value-to the processing industry (biodiesel production).…”

Section: Goal and Scopementioning

confidence: 99%

Life cycle analysis of macauba palm cultivation: A promising crop for biofuel production

Fernández-Coppel

Evaristo

Corrêa-Guimarães

et al. 2018

Industrial Crops and Products

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The 450 Scenario, which limits the increase in global average temperature to 2 ºC, makes it necessary to take steps towards a low-carbon economy. Since the energy sector is a major contribution to anthropogenic greenhouse gas (GHG) emissions, the production of biofuels can play a key role in strategies aimed at climate change mitigation. In this regard, the oil derived from macauba palm (Acrocomia aculeata), mainly constituted of saturated organic chains, has been claimed to hold promise for the production of liquid fuels. The high potential yield, diversity of co-products and various positive features of this emerging energy crop make it an interesting option both from a social and an environmental point of view. Nonetheless, a full environmental evaluation is still missing. In the study presented herein, the impacts produced in its plantation, cultivation and harvesting phases and the associated cumulative energy demand P r e p r i n t 2 have been determined using a life cycle analysis methodology, in addition to shedding some light on its GHG intensity relative to the other energy crops it can displace. Excluding land use changes and biogenic CO 2 fixed by the crop, it was concluded that to produce one ton of macauba fruit in Brazil, the system would absorb 1810.21 MJ, with GHG emissions of 158.69 kg CO 2 eq in the 20-year timeframe, and of 140.04 kg CO 2 eq in the 100-year timeframe (comparable to those of African oil palm). Damage to human health, ecosystem quality, and resources would add up to 16 Pt•t-1 according to Eco-indicator 99 methodology. In order to account for the uncertainty derived from improvement and domestication programs, which should affect current production levels, a sensitivity analysis for different productivities was performed. In all analyses, fertilization was found to be responsible for ca. 90% of the impacts, and hence special attention should be paid to the development of alternative fertilizer management schemes.

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Section: Goal and Scopementioning

confidence: 99%

Life cycle analysis of macauba palm cultivation: A promising crop for biofuel production

Fernández-Coppel

Evaristo

Corrêa-Guimarães

et al. 2018

Industrial Crops and Products

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An experimental study & analysis of effects of different parameters of microwave in production of bio-diesel

Garg

Pal

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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A novel and rapid method for transesterifying cottonseed oil into bio-diesel using a domestic microwave oven (MW) has been developed in the present study. Five parameters were investigated to see their effect on bio-diesel yield output. These were input power, reaction time, oil-to-methanol molar ratio, turntable speed, and fan cooling speed. The respective values used for experimentation were 200 W to 500 W, 4 to 11 minutes, 1:4.5 to 1:12, 10 to 40 rpm, and 800 to 1500 rpm and the volume of the catalyst was kept constant at 1%. The experimental results of microwave study were compared to the traditional magnetic stirrer (MS) approach for the same molar ratio and catalyst amount. The optimum parameters for the transesterification process assisted by the domestic microwave oven were obtained such as methanol to oil molar ratio (1:4.5), potassium hydroxide catalyst concentration (1% (w/w)), reaction time (11 minutes), turntable speed (40 rpm) and cooling fan speed (1500 rpm). The corresponding yield of cottonseed bio-diesel (CBD (MW)) was 99.5 percent. Compared with the contemporary MS approach for the same molar ratio and catalyst number, the yield of CBD (MS) was recorded in 25 minutes as 61.23 percent. It was also found that the turntable speed and cooling fan rpm of the improved microwave oven greatly, influenced the yield of bio-diesel and facilitated better utilization of microwave energy in mixing and avoid overheating of the sample mixture. A drastic reduction in microwave input power consumption was observed as compared to the pragmatic MS approach. The findings of this study have established the utility of energy-efficient, updated domestic microwave oven in the generation of bio-diesel on a small scale.

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MICROWAVE IRRADIATION AS AN ALTERNATIVE PROCESS FOR BIODIESEL PRODUCTION USING MACAUBA OIL (Acrocomia aculeata)

Cited by 2 publications

References 0 publications

Life cycle analysis of macauba palm cultivation: A promising crop for biofuel production

Life cycle analysis of macauba palm cultivation: A promising crop for biofuel production

An experimental study & analysis of effects of different parameters of microwave in production of bio-diesel

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