Modeling and optimization of the dilute-sulfuric-acid pretreatment of corn stover, poplar and switchgrass

Esteghlalian, Alireza; Hashimoto, Andrew G.; Fenske, John J.; Penner, Michael H.

doi:10.1016/s0960-8524(97)81606-9

Cited by 470 publications

(285 citation statements)

References 14 publications

Supporting

Mentioning

262

Contrasting

Unclassified

Order By: Relevance

“…The pretreatment has the capability to decrease the crystallinity of the cellulose and hemicellulose, remove the lignin content and avoid the production of potential inhibitors for fermenting organisms. Dilute acid pretreatment using sulphuric acid below 4.0% was considered to be an economical method, providing higher hydrolysis yield among the different physicochemical pretreatments (Esteghlalian et al, 1997). The process has been conducted in the temperature range of 100 °C -200 °C with pressure 15Psi to 75Psi for different time intervals (Gangulya et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Muhammad

Adnan

Bokhari

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-To change the recalcitrant nature of the lignocellulosic material for maximum hydrolysis yield, a comprehensive study was done by using sulphuric acid as an exclusive catalyst for the pretreatment process. The enzymatic digestibility of the biomass [Water Hyacinth: Eichhornia crassipes] after pretreatment was determined by measuring the hydrolysis yield of the pretreated material obtained from twenty four different pretreatment conditions. These included different concentrations of sulphuric acid (0.0, 1.0, 2.0 and 3.0%), at two different temperatures (108 and 121 °C) for different residence times (1.0, 2.0 and 3.0h).The highest reducing sugar yield (36.65 g/L) from enzymatic hydrolysis was obtained when plant material was pretreated at 121 °C for 1.0 h residence time using 3.0% (v/v) sulphuric acid and at 1:10 (w/v) solid to liquid ratio. The total reducing sugars obtained from the two-stage process (pretreatment + enzymatic hydrolysis) was 69.6g/L. The resulting sugars were fermented into ethanol by using Saccharomyces cerevisiae. The ethanol yield from the enzymatic hydrolyzate was 95.2% of the theoretical yield (0.51g/g glucose), as determined by GS-MS, and nearly 100% since no reducing sugars were detected in the fermenting media by TLC and DNS analysis.

show abstract

Section: Resultsmentioning

confidence: 99%

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Muhammad

Adnan

Bokhari

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Wu and Lee (1997) used a two-stage dilute sulfuric acid pretreatment with an acid concentration of 0.0785% (w/w) to successfully remove 100% of hemicellulose from switchgrass. Esteghlalian et al (1997) determined that up to 90% of xylose was recovered as a result of pretreatment at 180 °C with an acid concentration of 1.2% (w/w). It was also noted that temperature was a more significant parameter than acid concentration.…”

Section: Chemical Pretreatmentmentioning

confidence: 99%

Switchgrass for bioethanol and other value-added applications: A review

Keshwani

2009

Bioresource Technology

371

195

View full text Add to dashboard Cite

“…The main purposes of the pretreatment are lignin and hemicelluloses solubilization, reduction of cellulose crystallinity and increase the available surface area and pore volume of the substrate to allow a subsequent enzymatic hydrolysis with high production of fermentable sugars. 2,3 For pretreated spruce wood (softwood) with sulfite pretreatment to overcome lignocelluloses recalcitrance (SPORL) at 180ºC has been reported a enzymatic hydrolysis glucose yields of 372 kg/ton wood. 4 The development of continuous processes for alcoholic fermentation to reduce costs and increase ethanol production led to the investigation of fermentation processes in which free cells, flocculants or immobilized yeast were used.…”

Section: Introductionmentioning

confidence: 99%

Diluted Acid Pretreatment of Pinus Radiata for Bioethanol Production Using Immobilized Saccharomyces Cerevisiae Ir2-9 in a Simultaneous Saccharification and Fermentation Process

Franco¹,

Mendonça²,

Marcato

et al. 2011

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

The production of bioethanol from pretreated lignocellulosic materials requires the utilization of microorganisms adapted to ferment the materials in conditions were high consistency, temperatures and inhibitors concentrations were commonly found. The yeast immobilization in calcium alginate capsules has been reported to enhance the yeast protection and increase the efficiency in the fermentation process. In this work, it was investigated the use Saccharomyces cerevisiae immobilized in calcium alginate and its performance in simultaneous saccharification and fermentation (SSF) of diluted-acid-pretreated Pinus radiata. Results showed that when immobilized yeast was used, the bioethanol yield from pretreated wood was higher than with free yeast cells during a SSF process. Maximum ethanol yield obtained from the acid pretreated and milled wood chips was 153 L/ton wood, while from the hydrolysate fraction it was 18 L/ton wood. The sum of ethanol produced from dilute acid pretreated P. radiata for both solid and liquid fractions was 171 L ethanol/ton wood from a maximum theoretical of 236 L/ ton pretretated wood (or 72% of conversion).

show abstract

Modeling and optimization of the dilute-sulfuric-acid pretreatment of corn stover, poplar and switchgrass

Cited by 470 publications

References 14 publications

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Switchgrass for bioethanol and other value-added applications: A review

Diluted Acid Pretreatment of Pinus Radiata for Bioethanol Production Using Immobilized Saccharomyces Cerevisiae Ir2-9 in a Simultaneous Saccharification and Fermentation Process

Contact Info

Product

Resources

About