Acid impregnation and steam explosion of corn stover in batch processes

Zimbardi, Francesco; Viola, Egidio; Nanna, F.; Larocca, E.; Cardinale, M.; Barisano, D.

doi:10.1016/j.indcrop.2007.03.005

Cited by 76 publications

(41 citation statements)

References 53 publications

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“…Samples were pretreated over a range of reaction times and temperatures, with a severity [8] range of 2.5 to 3.2 (Eq. 1), where t is time in minutes and T is temperature in degrees Celsius [16].…”

Section: Experimental Designmentioning

confidence: 99%

“…Many studies of pretreatment using dilute acid are carried out under process scenarios which might be economically disadvantageous at a commercial scale, although suitable for fundamental laboratory research and for determining comparative data across different feedstocks and pretreatment approaches [4,[6][7][8]. Examples of this include pretreatment at low solids concentrations, over longer time periods, and using indirect heating methods.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High Xylose Yields from Dilute Acid Pretreatment of Corn Stover Under Process-Relevant Conditions

Weiss

Nagle

Tucker

et al. 2009

Appl Biochem Biotechnol

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Pretreatment experiments were carried out to demonstrate high xylose yields at high solids loadings in two different batch pretreatment reactors under process-relevant conditions. Corn stover was pretreated with dilute sulfuric acid using a 4-l Steam Digester and a 4-l stirred ZipperClave reactor. Solids were loaded at 45% dry matter (wt/wt) after sulfuric acid catalyst impregnation using nominal particle sizes of either 6 or 18 mm. Pretreatment was carried out at temperatures between 180 and 200 degrees C at residence times of either 90 or 105 s. Results demonstrate an ability to achieve high xylose yields (>80%) over a range of pretreatment conditions, with performance showing little dependence on particle size or pretreatment reactor type. The high xylose yields are attributed to effective catalyst impregnation and rapid rates of heat transfer during pretreatment.

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Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Xylose Yields from Dilute Acid Pretreatment of Corn Stover Under Process-Relevant Conditions

Weiss

Nagle

Tucker

et al. 2009

Appl Biochem Biotechnol

View full text Add to dashboard Cite

show abstract

“…A alta temperatura do vapor acarreta em liberação de grupos acetil ligados aos componentes da biomassa. Estes grupos na forma de ácido acético catalisam a hidrólise da ligação glicosídica que une os açúcares que compõe a hemicelulose, o que resulta na sua solubilização aquosa (ZIMBARDI et al, 2007) O pré-tratamento por explosão a vapor tem como vantagem o baixo impacto ambiental, devido ao uso de baixas concentrações de compostos químicos, comparado aos processos de hidrólise ácida e alcalina . Segundo os autores, o processo apresenta a desvantagem de liberar altas concentrações de produtos de degradação da lignina e de açúcares, que são inibidores da etapa de fermentação dos açúcares (SÖDERSTRÖM et al, 2002).…”

Section: Pré Tratamentounclassified

Processamento De Biomassa Lignocelulósica Para Produção De Etanol: Uma Revisão

Santiago

Rodrigues²

2017

JCEC

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“…In addition, studies have been carried out to try to improve the results of steam explosion by addition of chemicals such as acid or alkali (Cara et al, 2008;Harmsen et al, 2010;Stenberg et al, 1998;Zimbardi et al, 2007). Limitations of steam explosion include the formation of degradation products that may inhibit downstream processes (Garcia-Aparicio et al, 2006).…”

Section: Physico-chemical Pre-treatments 321 Steam Explosionmentioning

confidence: 99%