Biorefineries for the production of first and second generation ethanol and electricity from sugarcane

Dias, Margarida; Junqueira, Tassia L.; Cavalett, Otávio; Pavanello, Lucas G.; Cunha, Marcelo Pereira da; Jesus, Charles D.F.; Filho, Rubens Maciel; Bonomi, Antonio

doi:10.1016/j.apenergy.2013.03.081

Cited by 164 publications

(98 citation statements)

References 34 publications

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“…A variety of raw materials, which require different process configurations, have been examined, including bagasse and sugar cane [21,22], switch grass [23,24], wood [25][26][27], and corn and corn stover [28][29][30]. However, to the best of the authors' knowledge, there are few reports on the technical and economic aspects of wheat straw biorefineries.…”

Section: Introductionmentioning

confidence: 99%

Combined production of biogas and ethanol at high solids loading from wheat straw impregnated with acetic acid: experimental study and techno-economic evaluation

Joelsson

Dienes

Kovács

et al. 2016

Sustain Chem Process

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Background: Production of ethanol and biogas from acetic acid-impregnated steam-pretreated wheat straw was investigated. The solid fraction after pretreatment was used at high solids concentrations to generate ethanol by simultaneous saccharification and fermentation (SSF). The residual streams were evaluated with regard to biogas production. The experimental results were used to perform a techno-economic evaluation of a biorefinery concerning ethanol, raw biogas, pellet, and electricity production at various solid contents and residence times in the fermentation step. The configurations were also altered to include biogas upgrading to vehicle fuel quality or fermentation of xylose to ethanol. Results:At a water-insoluble solids (WIS) content in the SSF of between 10 and 20 %, the ethanol yields exceeded 80 %, the highest being 86 % at 12.5 % WIS, expressed as % of the theoretical maximum, based on the glucan content in SSF. Anaerobic digestion of wheat straw hydrolysate and stillage yielded 4.8 and 1.0-1.2 g methane/100 g dry straw, respectively, in 7-day experiments. Maximum recovery of overall product was achieved when SSF was run at between 10 and 15 % initial WIS content, for which the product yields from 100 g dry wheat straw were 16.1-16.3 g ethanol, 5.8-6.0 g methane, and 25 g lignin-rich solid residue. The net present value (NPV) was negative at discount rate of 11 % but positive at 5 % discount rate for all configurations. The 20 % WIS configuration with a residence time of 96 h in the fermentation stage attained the highest NPV. The minimum ethanol selling price varied between 0.72 and 0.87 EUR/L ethanol when the biogas was unchanged and it decreased to between 0.46 and 0.60 EUR/L ethanol when the biogas was upgraded to vehicle fuel quality or when xylose was converted to ethanol. Conclusions:According to the techno-economic assessment, a process that is based on the fermentation of only hexoses to ethanol, and production of raw biogas from xylose is not profitable under the economic assumptions including 11 % discount rate in the evaluation. However, the profitability of a plant can be improved by biogas upgrading to vehicle fuel quality or fermentation of xylose to ethanol.

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Section: Introductionmentioning

confidence: 99%

Combined production of biogas and ethanol at high solids loading from wheat straw impregnated with acetic acid: experimental study and techno-economic evaluation

Joelsson

Dienes

Kovács

et al. 2016

Sustain Chem Process

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“…8(b). It is also verified that energy market prices of 2G ethanol and bioelectricity play a key role in determining economic performances of a flexible sugarcane biorefinery [30,31].…”

Section: Influence Of Market and Technological Factors On The Technolmentioning

confidence: 98%

“…have examined how process optimization increases the production of second generation ethanol in sugarcane distilleries [11]. Recently, Furlan et al (2013) and Dias et al (2013) have investigated the economic advantages of a flexible (able to switch between 2G ethanol and bioelectricity production) sugarcane biorefinery [30,31]. Some authors claim that lignocellulosic ethanol may require policy support for implementation [32].…”

Section: Introductionmentioning

confidence: 99%

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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“…Several strategies have been suggested to maximize the economic utility of sugarcane bagasse in an eco-friendly manner [1]. Among these strategies is the modification of bagasse for metal chelation [2], its use for the production of biofuel and ethanol for industrial purposes [3][4][5] or as raw material in cogeneration plants to produce electric power in Brazil [6,7]. On the other hand, the value of sugarcane bagasse wastes was expanded to its utility as filler in cement [8], or as fiber rich additives in many thermoplastic or thermosetting petroleum polymers based composites including phenol-formaldehyde resins, polyethylene, polypropylene, and poly ethylene-co-vinyl acetate [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Plastic Composite Based on HIPS Loaded with Bagasse

El-Sayed¹,

Nagiebb

El‐Sayed

2017

Egypt. J. Chem.

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THE AVAILABILITY of natural fibers in Egypt such as bagasse, rice straw, corn husk, etc attracted the researcher interests to reutilize this agricultural biomass for the development of natural fiber reinforced composites for diversity valuable applications. Recently the utilization of bio-fillers in thermoplastics composites has increased. Polystyrene is a thermoplastic polymer that is commercially available with a wide range of high impact polystyrene (HIPS) applications in various fields because of its mechanical properties. So natural fiber reinforced thermoplastic polystyrene composites can be used as natural wood substitutes in housing, and constructions purposes. Herein we used sugarcane bagasse as a natural filler for HIPS. Where HIPS was melted and mixing with sugarcane bagasse at different ratios using screw extruder, then the fiber/polymer mixture was molded into standard test samples under pressure and heating. The effect of external effectors such as slight aqueous acidic, alkaline solutions, engine oil treatments or UV exposure on the mechanical properties of the prepared composites was investigated. Additionally, the impact of filler content on polystyrene thermal stability and morphological characteristics, water absorption, and swelling capacity were studied.

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Biorefineries for the production of first and second generation ethanol and electricity from sugarcane

Cited by 164 publications

References 34 publications

Combined production of biogas and ethanol at high solids loading from wheat straw impregnated with acetic acid: experimental study and techno-economic evaluation

Combined production of biogas and ethanol at high solids loading from wheat straw impregnated with acetic acid: experimental study and techno-economic evaluation

Optimizing ethanol and bioelectricity production in sugarcane biorefineries in Brazil

Characterization of Plastic Composite Based on HIPS Loaded with Bagasse

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