Exergo-environmental evaluation of liquid biofuel production processes

Velásquez, Héctor; Oliveira, Silvio de; Benjumea, Pedro; Pellegrini, Luiz Felipe

doi:10.1016/j.energy.2013.03.037

Cited by 26 publications

(21 citation statements)

References 22 publications

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“…The mash is transferred to a twin screw press where oil is extracted, and the press cake and liquor (composed of oil, water and impurities) are separated. Electricity consumption in extraction process is the largest in the biodiesel production plant and reaches 9 kW h/t FFB [38]. The oil present in the liquor is clarified by removing the sludge in sedimentation tanks.…”

Section: Biodiesel Production Routementioning

confidence: 99%

“…By considering that FFB are composed of oil (26%), water (49%), and fiber (25%), the chemical composition of the FFB is used to calculate the chemical exergy (16268kJ/kg FFB ) and 4 value (1.0736) thereof. The approximate chemical composition of biodiesel derived from palm oil (C 18 H 35 O 2 ) allows determining the chemical exergy (39,128 kJ/kg) and the 4 value (1.0484) of this fuel [38,39]. For the Brazilian case, herbicides and irrigation systems make only a small contribution to the energy consumption, as adult palms are not irrigated and herbicides are used only sporadically in isolated crop areas a few times per year [40].…”

Section: Biodiesel Production Routementioning

confidence: 99%

See 1 more Smart Citation

Renewable and non-renewable exergy costs and CO2 emissions in the production of fuels for Brazilian transportation sector

Flórez-Orrego

Silva

Velásquez

et al. 2015

Energy

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Section: Biodiesel Production Routementioning

confidence: 99%

Section: Biodiesel Production Routementioning

confidence: 99%

Renewable and non-renewable exergy costs and CO2 emissions in the production of fuels for Brazilian transportation sector

Flórez-Orrego

Silva

Velásquez

et al. 2015

Energy

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“…The first one is a utilities plant with subcritical Rankine cycle [6], the second one is a distillery plant [7], and the third one is a hydrolysis plant [8]. Each one of them will be explored separately and the complete model to be solved in this study arises from the assembly of these three sub-models.…”

Section: Development Of the Modelmentioning

confidence: 99%

Thermoeconomic Analysis of Combined Production of Electricity and Second Generation Ethanol Based on the Dilute Acid Hydrolysis of Sugarcane Bagasse

Flório¹,

Oliveira

2014

Int. J. Thermo

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In this study, a thermoeconomic assessment of an integrated ethanol production from sugarcane bagasse and traditional sugarcane juice is developed and discussed. An integrated distillery, which works with first and second generation ethanol production routes, is modeled and simulated. The thermoeconomic model assumes that the only agricultural input to the processes is the sugarcane itself (straw or other wastes recovered from the field were not considered in the analysis). The analyses are carried out for three operating scenarios: scenario I describes a traditional distillery or a first generation distillery; scenario II takes into account an integrated distillery operating with current acid hydrolysis technology; scenario III describes an improved distillery which operates with future technology for hydrolysis and pentose fermentation. Exergy analysis, production cost analysis and economic viability assessment are carried out for each scenario. As a result, it can be concluded that the global exergy efficiency decreases with the bagasse hydrolysis for scenario II. This situation is reversed when pentose fermentation is considered in scenario III. The economic viability assessment shows that hydrolysis is not viable in the present Brazilian economic scenario because it causes a drop of 4.0% in the internal rate of return (IRR) for scenario II and 2.3% for scenario III, when compared to scenario I.

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“…A corollary to this procedure consists in comparing, or even classify, alternatives of potential performance gain for energy systems, according to their conducts in terms of energy use and consequences to the surroundings (Banerjee & Tierney, 2011;Koroneos & Tsarouhis, 2012;Moya et al, 2013;Iribarren et al, 2013;Velásquez et al, 2013;Abusoglu & Sedeeq, 2014). The proposal is useful to support decision-making processes exercised in industrial complexes that, for different reasons, ought to be operated according to the perspectives of cleaner production and loss prevention, as regards to the selection of technological alternatives.…”

mentioning

confidence: 99%

Use of Environmental and Thermodynamic Indicators to Assess the Performance of an Integrated Process for Ethanol Production

Nogueira¹,

Donke²,

Matsuura³

et al. 2014

ENRR

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Corn is one of the possibilities for diversification of Brazilian ethanol production. Four scenarios of analysis were established. The environmental dimension was evaluated by the Life Cycle Assessment (LCA) approach, whereas the Thermodynamic performance was verified by applying the techniques of Cumulative Energy Demand (CED) and Cumulative Exergy Demand (CExD). The production of ethanol from corn using wood chips for energy supply of the plant resulted in a homogeneous environmental performance. Factors such direct seeding -and the LHV of the wood for energy support this result. For both Thermodynamic analysis the production of sugarcane ethanol had better indexes because the use of bagasse replaced other sources of primary energy. This result remained for a combined analysis between the two dimensions, which related environmental effects in terms of Climate Change with the aggregation of primary energy consumption for ideal systems.

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Exergo-environmental evaluation of liquid biofuel production processes

Cited by 26 publications

References 22 publications

Renewable and non-renewable exergy costs and CO2 emissions in the production of fuels for Brazilian transportation sector

Renewable and non-renewable exergy costs and CO2 emissions in the production of fuels for Brazilian transportation sector

Thermoeconomic Analysis of Combined Production of Electricity and Second Generation Ethanol Based on the Dilute Acid Hydrolysis of Sugarcane Bagasse

Use of Environmental and Thermodynamic Indicators to Assess the Performance of an Integrated Process for Ethanol Production

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