Updates on Softwood-to-Ethanol Process Development

Mabee, Warren; Gregg, David J.; Arato, Claudio; Berlin, Alex; Bura, Renata; Gilkes, Neil R.; Mirochnik, Olga; Pan, Xuejun; Pye, Erica; Saddler, John N.

doi:10.1007/978-1-59745-268-7_5

Cited by 42 publications

(46 citation statements)

References 19 publications

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“…As discussed in the previous paper (Kautto et al 2013), the carbohydrate recovery was assumed to be 84% based on Pan et al (2006), being considerably lower than that in the NREL study (Humbird et al 2011) (approximately 98%). Mabee et al (2006) reported a higher recovery in the organosolv cooking of softwood (90% for both glucose and hemicelluloses), suggesting that a higher carbohydrate recovery could be achievable. Improved carbohydrate recovery was, however, not specifically studied in the sensitivity analyses since the effect of such a change would be similar to that of the improved enzymatic hydrolysis.…”

Section: Technical Parameters Varied In Sensitivity Analysesmentioning

confidence: 97%

“…Capital and operating costs were calculated for the ultrafiltration system, resulting in a production cost of 52 EUR/MT (68 USD/MT) of lignin. Mabee et al (2006) estimated the mass and energy balances and investment and operating costs for bioethanol production processes based on acid-catalyzed ethanol organosolv and sulfur dioxide-catalyzed steam explosion pretreatments of Douglas fir. They compared the processes and found the total production costs of the organosolv process to be lower.…”

Section: Introductionmentioning

confidence: 99%

“…Although economic assessments of organosolv processes have been published (Parajó and Santos 1995;Mabee et al 2006;González Alriols et al 2010;Dias et al 2011;van der Linden et al 2012), no comprehensive studies analyzing the economic feasibility of ethanol production as well as the effect of co-products on the economics based on detailed flowsheets and balances are known. This paper is a continuation of a previous paper (Kautto et al 2013) in which the technical and simulation aspects of an acid-catalyzed ethanol organosolv process for the production of bioethanol and coproducts, lignin, acetic acid, and furfural, from lignocellulosic material were examined.…”

Section: Introductionmentioning

confidence: 99%

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Economic Analysis of an Organosolv Process for Bioethanol Production

Kautto¹,

Park²,

Ragauskas³

et al. 2014

BioResources

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In a previous paper, conceptual process design, simulation, and mass and energy balances were presented for an organosolv process with a hardwood feed of 2350 metric tons (MT) per day and ethanol, lignin, furfural, and acetic acid production rates of 459, 310, 6.6, and 30.3 MT/day, respectively. In this paper, the investment and operating costs of the process and the minimum ethanol selling price (MESP) to make the process economically feasible were estimated. The total capital investment of the plant was approximately 720 million USD. Lignin price was found to affect the MESP considerably. With a base case lignin price of 450 USD/MT, the MESP was approximately 3.1 USD per gallon (gal). Higher lignin price of 1000 USD/MT was required to equal the MESP with the December 2013 ethanol market price (2.0 USD/gal). In addition to lignin price, the MESP was found to be strongly affected by feedstock, enzyme, and investment costs. Variations in feedstock and investment costs affected the MESP by approximately 0.2 and 0.5 USD/gal, respectively. Changing the enzyme dosage and price from base case estimate of 5270 USD/MT and 0.02 g/g cellulose to more conservative 3700 USD/MT and 0.06 g/g cellulose, respectively, increased the MESP by 0.59 USD/gal.

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Section: Technical Parameters Varied In Sensitivity Analysesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Economic Analysis of an Organosolv Process for Bioethanol Production

Kautto¹,

Park²,

Ragauskas³

et al. 2014

BioResources

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“…The two critical stages in the technical-economic efficiency of the process of obtaining ethanol from lignocellulosic biomass are pretreatment and prehydrolysis. They can be decisive for the feasibility of the process of biochemical conversion of the sugars to ethanol (Zhui et al, 2008;Mabee et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Sugar cane bagasse prehydrolysis using hot water

Abril

Medina

Abril

2012

Braz. J. Chem. Eng.

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-Results are presented on the hot water prehydrolysis of sugar cane bagasse for obtaining ethanol by fermentation. The experimental study consisted of the determination of the effect of temperature and time of prehydrolysis on the extraction of hemicelluloses, with the objective of selecting the best operating conditions that lead to increased yield of extraction with a low formation of inhibitors. The study, carried out in a pilot plant scale rotational digester, using a 3 2 experimental design at temperatures of 150-190°C and times of 60-90 min, showed that it is possible to perform the hot water prehydrolysis process between 180-190°C in times of 60-82 min, yielding concentrations of xylose ≥ 35 g/L, furfural ≤ 2.5 g/L, phenols from soluble lignin ≤ 1.5 g/L, and concentrations ≤ 3.0 g/L of hemicelluloses in the cellolignin residue. These parameters of temperature and prehydrolysis time could be used for the study of the later hydrolysis and fermentation stages of ethanol production from sugar cane bagasse.

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“…O pré-tratamento pode ser realizado de diferentes maneiras, tais como pré-tratamento mecânico, químico ou biológico (HAMELINCK; VAN HOOIJDONK;JAAIJ, 2005;MABEE et al, 2006;LEE et al, 2010).…”

Section: Etapas De Produção De Bioetanol a Partir Da Biomassaunclassified

Produção de Bioetanol Utilizando Microalgas: Uma Revisão

et al. 2016

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ResumoA busca por biocombustíveis foi impulsionada nas ultimas décadas devido à preocupação com o esgotamento das fontes enérgicas não renováveis. Essa revisão de literatura oferece uma abordagem da aplicação de microrganismos para a produção de bioetanol, com ênfase para as microalgas. A elevada eficiência de conversão fotossintética, o rápido crescimento, a possibilidade de manipulação do meio de cultivo a fim de produzir biomassa com elevado teor de lípidos e carboidratos, e o uso de áreas com baixa aptidão agrícola fazem das microalgas uma das matérias primas mais promissoras para a produção de biocombustíveis. A existência de uma grande variedade de métodos para a obtenção de biomassa microalgal e posterior produção de bioetanol, estimulou diversos estudos para aumentar o potencial de produção e aperfeiçoar o processo. Estudos apontam que para a produção de bioetanol atingir viabilidade econômica, a produção da biomassa algal deve objetivar ainda a obtenção de outros compostos, de maior valor agregado, como pigmentos, proteínas, ácidos graxos poli-insaturados, obedecendo ao conceito das biorrefinarias integradas. The search for biofuels has been driven in recent decades due to concern over the depletion of nonrenewable energetic sources. This literature review provides an approach to the application of microorganisms for the production of bioethanol, with emphasis on microalgae. The high efficiency of photosynthetic conversion, rapid growth, the possibility of manipulation of the medium to produce biomass with high fat and carbohydrates, and the use of areas with low agricultural potential of microalgae are one of the most promising raw materials for the production of biofuels. The existence of a large variety of methods for obtaining microalgal and subsequent production of bioethanol, biomass stimulated numerous studies to increase the production potential and improve the process. Studies show that for the production of bioethanol achieve economic viability, production of algal biomass should also aim at obtaining other compounds with higher added value, such as pigments, proteins, polyunsaturated fatty acids, according to the concept of integrated biorefineries.

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Updates on Softwood-to-Ethanol Process Development

Cited by 42 publications

References 19 publications

Economic Analysis of an Organosolv Process for Bioethanol Production

Economic Analysis of an Organosolv Process for Bioethanol Production

Sugar cane bagasse prehydrolysis using hot water

Produção de Bioetanol Utilizando Microalgas: Uma Revisão

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