Comparative analysis for power generation and ethanol production from sugarcane residual biomass in Brazil

Seabra, Joaquim E. A.; Macedo, Isaías C.

doi:10.1016/j.enpol.2010.10.019

Cited by 152 publications

(115 citation statements)

References 8 publications

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“…This sharp increase can be attributed to three factors: the introduction of flex-fuel car engines in 2003, which can run with any proportion of gasoline and ethanol; restrictions imposed on export of subsidized sugar from the European Union (WTO 2005), opening new markets for Brazilian sugar; and the increasing price of sugar in the international market (Trostle et al 2011). Yet aside from these benefits, sugarcane is an intrinsically appealing crop: it is a flexible crop that allows companies to shift production in the direction of more sugar or more ethanol depending which one presents better prices; at the same time, sugarcane production generates a profitable surplus of electricity through bagasse burning, which is delivered to the country's national grid (Seabra and Macedo 2011). At the national level, sugarcane expansion can be argued to have had little impact on land use and land use change, as it occupies only 2.4% of Brazil farming land (IBGE 2012).…”

Section: Introductionmentioning

confidence: 99%

Where is sugarcane cropping expanding in the brazilian cerrado, and why? A case study

Arruda

Slingerland

2017

An. Acad. Bras. Ciênc.

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Sugarcane growing area in Brazil sharply expanded between 2000 and 2010 due to the increasing world demand for sugar and ethanol. Since this expansion of sugarcane is said to occur in areas covered by degraded pastures, it is likely not threatening the environment or food production. In order to verify this assumption, we investigate at farm and field levels which types of land use sugarcane cropping replaced between 2005 and 2010 and the reasons for farmers shifting or not shifting to sugarcane, as a case study in two counties in the state of Goiás. Within the studied period, sugarcane cropping expansion was related to large farms, lower risk perceived by farmers, and higher profitability compared with soybean and beef cattle-raising. For smallholders, particularly dairy farmers, the need to comply with the set-aside rules under Brazilian Forest Code (Código Florestal Brasileiro) made a shift to sugarcane less attractive, as it would have forced them to reduce farm cultivable area, with loss of incomes. From 30,408 ha under sugarcane surveyed, 45.7% had used to be pastures, 31% had previously been pastures rotated with soybean and maize, and 23.3% had been cropped exclusively with soybean or maize.

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Section: Introductionmentioning

confidence: 99%

Where is sugarcane cropping expanding in the brazilian cerrado, and why? A case study

Arruda

Slingerland

2017

An. Acad. Bras. Ciênc.

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“…Note that Seabra and Macedo (2011) use a range of electricity emission factor from 400 to 1000 kgCO 2eq /MWh (i.e. about 110e280 kgCO 2eq /GJ) for analyzing avoided emissions [6]. The retail price of electricity represents the actual price of end-use electricity service in Brazil whereas auction prices, which are lower than the retail prices only indicate the gate prices.…”

Section: Gasoline a 838 Electricity Bmentioning

confidence: 99%

“…The conventional sugarcane mills are self-sufficient in their internal energy requirements using bagasse as a fuel in boilers with a little or no electricity sold to the grid [3,6]. It is assumed that there is no surplus bagasse or electricity in the conventional mills as the sugarcane mills are traditionally designed to meet the internal energy requirements.…”

Section: Business As Usual/conventional Technologymentioning

confidence: 99%

“…Generation of a small amount of surplus electricity (i.e. 10e25 kWh/t cane) in the conventional sugarcane mills [6] is neglected.…”

Section: Business As Usual/conventional Technologymentioning

confidence: 99%

“…Walter and Ensinas (2010) have described the technological pathways of biofuel production from sugarcane biomass and analyzed the impact of process integration with a conventional sugarcane distillery [7]. Systems performance is simulated for the technical, economic and environmental merit of power generation and ethanol production from sugarcane residual biomass, considering conversion plants adjacent to a sugarcane mill [6]. Dias et al (2011) have performed simulation studies to determine the suitable option when selecting second generation or bioelectricity from the sugarcane biomass feedstock [9].…”

Section: Introductionmentioning

confidence: 99%

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Optimizing ethanol and bioelectricity production in sugarcane biorefineries in Brazil

et al. 2016

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a b s t r a c tIn sugarcane biorefineries, the lignocellulosic portion of the sugarcane biomass (i.e. bagasse and cane trash) can be used as fuel for electricity production and/or feedstock for second generation (2G) ethanol. This study presents a techno-economic analysis of upgraded sugarcane biorefineries in Brazil, aiming at utilizing surplus bagasse and cane trash for electricity and/or ethanol production. The study investigates the trade-off on sugarcane biomass use for energy production: bioelectricity versus 2G ethanol production. The BeWhere mixed integer and spatially explicit model is used for evaluating the choice of technological options. Different scenarios are developed to find the optimal utilization of sugarcane biomass. The study finds that energy prices, type of electricity substituted, biofuel support and carbon tax, investment costs, and conversion efficiencies are the major factors influencing the technological choice. At the existing market and technological conditions applied in the upgraded biorefineries, 300 PJ y À1 2G ethanol could be optimally produced and exported to the EU, which corresponds to 2.5% of total transport fuel demand in the EU. This study provides a methodological framework on how to optimize the alternative use of agricultural residues and industrial co-products for energy production in agro-industries considering biomass supply chains, the pattern of domestic energy demand, and biofuel trade.

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Sugarcane as an Energy Crop: Its Role in Biomass Economy

Antwerpen¹,

Berry²,

Antwerpen³

et al. 2013

Biofuel Crop Sustainability

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Comparative analysis for power generation and ethanol production from sugarcane residual biomass in Brazil

Cited by 152 publications

References 8 publications

Where is sugarcane cropping expanding in the brazilian cerrado, and why? A case study

Where is sugarcane cropping expanding in the brazilian cerrado, and why? A case study

Optimizing ethanol and bioelectricity production in sugarcane biorefineries in Brazil

Sugarcane as an Energy Crop: Its Role in Biomass Economy

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