Agricultural and agro-industrial residues-to-energy: Techno-economic and environmental assessment in Brazil

Portugal-Pereira, Joana; Soria, Rafael; Rathmann, Régis; Schaeffer, Roberto; Szklo, Alexandre

doi:10.1016/j.biombioe.2015.08.010

Cited by 114 publications

(75 citation statements)

References 61 publications

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“…The authors acknowledge the contribution of Tobias Fichter from DLR to the preparation of the model input data and assumptions. We also thank Mariana Imperio, Cindy Viviescas, Fernanda Guedes, Bruno Scola, Rodrigo Milani, Roberto Schaeffer, and Alexandre Szklo from the Federal University of Rio de Janeiro (UFRJ) to the preparation of the model input Energies 2017, 10, 1859 …”

Section: Acknowledgmentsmentioning

confidence: 99%

“…Biofuels and the large scale use of sugar cane residues, including second generation technologies have long been one major focus of technology development [6][7][8][9]. Agricultural and agro-industrial residues also have a large energetic potential in Brazil [10]. Wind power and solar power not only have large potentials in Brazil [11,12], but are also considered to be cost efficient [13].…”

Section: Introductionmentioning

confidence: 99%

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100% Renewable Energy Supply for Brazil—The Role of Sector Coupling and Regional Development

2017

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Abstract:With its abundance of renewable energy potentials, not only for hydropower and bioenergy, but also for wind and solar, Brazil provides good prospects for a carbon neutral energy system. The role of an enhanced coupling of the power, heat and transport sectors in such systems is not yet fully understood. This paper analyses the least-cost composition and operation of a fully renewable power supply system as part of a carbon neutral energy supply in Brazil. It relies on the application of the high-resolution energy system model REMix. Our analysis reveals that the expansion of wind and solar power is more cost-efficient than the construction of additional hydroelectric plants. This is favoured because the existing hydroelectric plants offer large capacity of dispatchable power to compensate for fluctuations, and thus no additional storage is necessary. Furthermore, the REMix analysis indicates that varying shares of solar and wind power technologies as well as the spatial distribution of power generation have only a small influence on supply costs. This implies that the transformation strategy in Brazil can be primarily based on other criteria such as regional development, public acceptance, environmental impact or industrial policy without major impacts on system costs.

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Section: Acknowledgmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

100% Renewable Energy Supply for Brazil—The Role of Sector Coupling and Regional Development

2017

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“…Vários estudos foram realizados com o objetivo de caracterizar e avaliar a disponibilidade de biomassa para produzir carvão vegetal, incluindo estudos de viabilidade técnica e econômica e as perspectivas da indústria no Brasil. [9][10][11][12][13][14] Trabalhos semelhantes já foram realizados em outras partes do mundo, principalmente focados na torrefação e carbonização de materiais como bambu, casca de coco e madeira. [15][16] Mathieson et al 17 estudaram a utilização da biomassa como combustível alternativo na fabricação de ferro-gusa.…”

Section: Introductionunclassified

Energetic Potential of Coconut Shell (Cocos nucifera L.) for Use in the Charcoal Production by Pyrolysis

et al. 2018

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The lack of a correct destination for the disposal of green coconut residues and their potential as biomass stimulates their use for energy purposes. Therefore, the aim of this work was investigate the energetic potential of the green coconut shell (Cocos nucifera L.) to charcoal production by pyrolysis. In order to obtain charcoal, samples the green coconut shell was submitted to pyrolysis at different temperatures: 300 °C (CP300), 350 °C (CP350), 400 °C (CP400), 450 °C (CP450) and 500 °C (CP500). The green coconut shell and the produced charcoal were characterized by: proximate analysis, higher heating value (HHV) and thermogravimetric analysis (TG). For the produced charcoal, their gravimetric and energy and fixed carbon yields were also determined. It was observed that with the increase of the pyrolysis temperature, there was a decrease in the volatile content (CP300 = 37.95% and CP500 = 14.94%), and consequently, increase in fixed carbon (CP300 = 56.42% and CP500 = 79.39%) and HHV (CP300 = 28.84 MJ / kg and CP500 = 29.59 MJ / kg). The increase in temperature also caused a decrease in the gravimetric yield (CP300 = 48.05% and CP500 = 33.29%) and energy yield (CP300 = 66.50% and CP500 = 52.76%) and an increase in thermal stability. It can be concluded that the charcoal of the green coconut shell is an alternative for the energy reutilization of this residue and also can be used as commercial charcoal.Keywords: Bioenergy; biomass; residues; pyrolisis. ResumoA falta de um destino correto para o descarte dos resíduos de coco verde e seu potencial como biomassa estimula sua utilização para fins energéticos. Este trabalho teve como objetivo investigar o potencial energético da casca de coco verde (Cocos nucifera L.) para produção de carvão vegetal através de estudo pirolítico. Para a obtenção do carvão vegetal, as amostras foram submetidas à pirólise, nas temperaturas de 300 °C (CP300), 350 °C (CP350), 400 °C (CP400), 450 °C (CP450) e 500 °C (CP500). A casca de coco e os carvões produzidos foram caracterizados mediante: análise imediata, poder calorífico superior (PCS) e análise termogravimétrica (TG). Para os carvões vegetais produzidos, foram também determinados seus rendimentos gravimétricos, energéticos e em carbono fixo. Observou-se que, com o aumento da temperatura de pirólise, houve a diminuição do teor de voláteis (CP300=37,95% e CP500=14,94%) e, consequentemente, aumento do carbono fixo (CP300=56,42% e CP500=79,39%) e PCS (CP300=28,84 MJ/kg e CP500=29,59 MJ/kg). O aumento da temperatura também provocou a diminuição do rendimento gravimétrico (CP300=48,05% e CP500=33,29%) e energético (CP300=66,50% e CP500=52,76%) e um aumento na estabilidade térmica. Pode-se concluir que o carvão vegetal da casca de coco verde é uma alternativa para o reaproveitamento energético desse resíduo e tem condições para ser utilizado como carvão vegetal comercial.

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“…Other strategic decisions for transitioning from conventional systems [66] to innovative systems have focused on the use of farming and forestry waste as sources of bioenergy [67,68].…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency Strategies for Ecological Greenhouses: Experiences from Murcia (Spain)

Becerril

Ríos

2016

Energies

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There has been a continuous growth in ecological agriculture (EA) in recent years. It is recognized as a production system with rational energy use and low demand for fossil fuels. There are many studies relating to this subject, in contrast to the few studies regarding the use of energy and its impact on the environment in ecological greenhouses. This article analyzes the strategies adopted by a Transformational Agricultural Society (Sociedad Agraria de Transformación) in order to improve energy efficiency in ecological greenhouses, with regards to the use of fossil fuels. The methodology is based on the Working With People (WWP) Model, which involves social learning processes over 30 years in one of the largest regions of ecological crops in Spain. The results show that the measures taken to manage the greenhouses have achieved a decrease of over 80% in terms of fossil fuel consumption. The experience demonstrates that EA, as opposed to conventional agriculture (CA), is a system with great potential when it comes to reducing energy consumption and environmental improvements through various strategies.

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Agricultural and agro-industrial residues-to-energy: Techno-economic and environmental assessment in Brazil

Cited by 114 publications

References 61 publications

100% Renewable Energy Supply for Brazil—The Role of Sector Coupling and Regional Development

100% Renewable Energy Supply for Brazil—The Role of Sector Coupling and Regional Development

Energetic Potential of Coconut Shell (Cocos nucifera L.) for Use in the Charcoal Production by Pyrolysis

Energy Efficiency Strategies for Ecological Greenhouses: Experiences from Murcia (Spain)

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