A techno-economic evaluation of the effects of centralized cellulosic ethanol and co-products refinery options with sugarcane mill clustering

Seabra, Joaquim E. A.; Tao, Ling; Chum, Helena L.; Macedo, Isaías C.

doi:10.1016/j.biombioe.2010.01.042

Cited by 154 publications

(127 citation statements)

References 3 publications

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“…Furthermore, sharing of pre-existing logistics, supply chain and infrastructure for feedstock supply with an existing biomass processing operation can reduce capital and operational cost substantially, especially when considering the significant contribution to production costs from these costs [85,96,99]. The Brazilian sugar industry, an example for Africa, is prioritizing the colocation of lignocellulose conversion with existing sugarcane-processing plants for cost minimization [102], which may include the combination of surplus bagasse from a number of nearby mills for economies of scale, and/or using sugarcane agricultural residues (SCARs) to provide energy to primary sugarcane milling, thus liberating additional bagasse for conversion [99,102].…”

Section: 22mentioning

confidence: 99%

Next-generation cellulosic ethanol technologies and their contribution to a sustainable Africa

et al. 2011

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The world is currently heavily dependent on oil, especially in the transport sector. However, rising oil prices, concern about environmental impact and supply instability are among the factors that have led to greater interest in renewable fuel and green chemistry alternatives. Lignocellulose is the only foreseeable renewable feedstock for sustainable production of transport fuels. The main technological impediment to more widespread utilization of lignocellulose for production of fuels and chemicals in the past has been the lack of low-cost technologies to overcome the recalcitrance of its structure. Both biological and thermochemical second-generation conversion technologies are currently coming online for the commercial production of cellulosic ethanol concomitantly with heat and electricity production. The latest advances in biological conversion of lignocellulosics to ethanol with a focus on consolidated bioprocessing are highlighted. Furthermore, integration of cellulosic ethanol production into existing bio-based industries also using thermochemical processes to optimize energy balances is discussed. Biofuels have played a pivotal yet suboptimal role in supplementing Africa's energy requirements in the past. Capitalizing on sub-Saharan Africa's total biomass potential and using second-generation technologies merit a fresh look at the potential role of bioethanol production towards developing a sustainable Africa while addressing food security, human needs and local wealth creation.

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Section: 22mentioning

confidence: 99%

Next-generation cellulosic ethanol technologies and their contribution to a sustainable Africa

et al. 2011

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“…Seabra et al (2010) have evaluated the techno-economic performance of thermochemical and biochemical conversion of sugarcane residues, considering sugarcane mill clustering [26]. 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].…”

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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“…A cana-de-açúcar (Saccharum spp) é uma importante cultura a nível mundial, não só pela produção de açúcar, mas também como uma cultura energética, devido à sua grande produtividade de matéria seca (SUREDRAN et al, 2016 A energia primária da cana-de-açúcar é de, aproximadamente, 7400 MJ por tonelada de colmos, distribuídos em um terço nos açúcares e dois terços nas fibras do bagaço e das folhas (LEAL et al, 2013). Na colheita mecanizada, as folhas e os ponteiros da cana-de-açúcar são separados dos colmos, sendo deixados no campo, quando passam a ser denominados de palhada.…”

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Análise Técnico Econômica Do Aproveitamento Da Palhada Da Cana-De-Açúcar Na Geração De Energia Elétrica No Norte Do Paraná

et al. 2017

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RESUMO:A palhada representa um terço da energia primária da cana-de-açúcar, mas a sua utilização ainda é incipiente, apesar da grande potencialidade para o seu aproveitamento. O objetivo do trabalho foi avaliar o potencial de geração de energia elétrica da palhada de cana-de-açúcar em conjunto com o bagaço, através de uma análise técnico-econômica. Realizou -se o dimensionamento de uma frota dedicada ao recolhimento da palhada e de uma nova planta de cogeração, com substituição das caldeiras e turbinas existentes, inclusive as turbinas de acionamento dos equipamentos de preparação e extração, em uma usina típica do norte do Paraná. Foram estimados os investimentos necessários para a aquisição dessa frota e da modernização proposta para a área industrial. Os custos do recolhimento da palhada e da geração de energia elétrica foram calculados, bem como o preço mínimo de venda da energia. Também foram calculados a quantidade de consumidores residenciais e os municípios que poderiam ser abastecidos por essa energia. A capacidade de exportação é de 111,912 kWh por tonelada de cana-de-açúcar, com custo da palhada no pátio de bagaço da usina a R$68,08 t -1 , custo da energia-elétrica de R$125,55 MWh e preço mínimo de comercialização da energia a R$316,64 MWh. A energia elétrica exportada pode atender uma população de 87.946 pessoas, o que corresponde a energia consumida pela cidade onde estaria localizado o projeto e de mais seis municípios canavieiros do Norte do Paraná. O projeto proporciona a criação de 96 novos empregos diretos. PALAVRAS-CHAVES:Cogeração, eletricidade, bioenergia, biomassa, enfardamento. TECHNIC-ECONOMIC EVALUATION OF SUGARCANE STRAW FOR POWER GENERATION IN PARANA STATE ABSTRACT:The straw represents one-third of the sugarcane's primary energy, but its exploitation is still incipient, despite having a huge potential for its utilization. This research aimed to evaluate the potential energy generation of sugarcane residues together with the bagasse, through a technical and economic analysis. The fleet sizing dedicated to straw harvesting and a new combined heat and power plant, replacing the existing boilers and turbines, inclusive the turbines of preparation and extraction, was made in a north of Parana's typical sugarcane mill. All the investments required were estimated in order to purchase this new fleet and proposals for the modernization of the industrial area. The straw harvesting and electrical power generation expenses were determined, as well as the energy's minimum selling price. The residential consumers were also estimated and as well as the cities that could be supplied with this energy. The export capability is 111.912 kW per ton of cane, the straw in the plant's stockyards R$68.08 t INTRODUÇÃOA cana-de-açúcar (Saccharum spp) é uma importante cultura a nível mundial, não só pela produção de açúcar, mas também como uma cultura energética, devido à sua grande produtividade de matéria seca (SUREDRAN et al., 2016 A energia primária da cana-de-açúcar é de, aproximadamente, 7400 MJ por tonela...

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A techno-economic evaluation of the effects of centralized cellulosic ethanol and co-products refinery options with sugarcane mill clustering

Cited by 154 publications

References 3 publications

Next-generation cellulosic ethanol technologies and their contribution to a sustainable Africa

Next-generation cellulosic ethanol technologies and their contribution to a sustainable Africa

Optimizing ethanol and bioelectricity production in sugarcane biorefineries in Brazil

Análise Técnico Econômica Do Aproveitamento Da Palhada Da Cana-De-Açúcar Na Geração De Energia Elétrica No Norte Do Paraná

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