Kinetic characterization of biomass dilute sulfuric acid hydrolysis: Mixtures of hardwoods, softwood, and switchgrass

Jensen, Jill R.; Morinelly, Juan E.; Aglan, Anwar; Mix, Adam; Shonnard, David R.

doi:10.1002/aic.11467

Cited by 55 publications

(50 citation statements)

References 20 publications

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“…Studies on other applications of lignocellulosic mixtures have demonstrated that combining substrates usually has no negative impacts on product yields; more often than not, higher yields were obtained on mixtures than on the single substrates. Such observations have been reported with respect to the pretreatment and hydrolysis of mixed substrates (Jensen et al 2008;Moutta et al 2013;Moutta et al 2014;Pereira et al 2015), bioethanol production (Erdei et al 2010;Pereira et al 2015), and fungal cellulase production (Olsson et al 2003). …”

Section: Growth and Endoglucanase Production On Various Cellulosic Casupporting

confidence: 53%

Enhanced Endoglucanase Production by Bacillus aerius on Mixed Lignocellulosic Substrates

2016

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Selected carbon sources including soluble carboxymethyl cellulose (CMC), insoluble microcrystalline cellulose (MCC), and single (SS)/mixed lignocellulosic substrates (MS), were evaluated for endoglucanase production by B. aerius S5.2. The lignocellulosic substrates of oil palm empty fruit bunch (EFB), oil palm frond (OPF), rice husk (RH), and their mixture (MS) supported growth of the strain better than CMC and MCC. The maximum endoglucanase activity on MS was 7.3-, 2.6-, 1.7-, and 1.2-fold higher than those recorded on MCC, CMC, EFB/OPF, and RH, respectively. While the reducing sugar concentration of the CMC medium was comparable to that of the EFB and MS media, wide variability was observed in the reducing sugar concentrations among the lignocellulosic substrates. Extremely low levels of sugar were detected in the MCC medium, reflecting its poor digestibility and hence unsuitability for growth and endoglucanase production. Endoglucanase production was predominantly extracellular when the strain was grown on CMC and MS. After seven days of fermentation, there was an approximately 25% reduction in MS dry weight. These findings show that the use of mixed lignocellulosics could potentially reduce the cost of cellulase production. Certain novel aspects of the cellulase system of B. aerius are reported in this study.

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Section: Growth and Endoglucanase Production On Various Cellulosic Casupporting

confidence: 53%

Enhanced Endoglucanase Production by Bacillus aerius on Mixed Lignocellulosic Substrates

2016

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“…The recovery of xylose is especially important because xylose fermentation has the potential to increase the ethanol yield by up to 50% with little additional cost, provided that an organism capable of utilizing C 5 sugars is readily available [21]. Moreover, xylose is the major compositional sugar of hardwood hemicelluloses [22]. Dilute acid pretreatments can be carried out at temperatures up to 180°C [16,17].…”

Section: Soxhlet Methanolmentioning

confidence: 99%

Sweetgum (Liquidambar styraciflua L.): Extraction of Shikimic Acid Coupled to Dilute Acid Pretreatment

Martin

Duke

Pelkki

et al. 2010

Appl Biochem Biotechnol

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Liquidambar styraciflua L., also known as sweetgum, is an understory hardwood species that has widespread distribution in the southeast USA, especially in pine plantations. In addition to being a possible biorefinery feedstock, sweetgum contains shikimic acid, which is a precursor for the drug Tamiflu. Sweetgum bark was extracted with 65 degrees C water and yielded 1.7 mg/g of shikimic acid, while sweetgum de-barked wood yielded 0.2 mg/g of shikimic acid. Because shikimic acid can be extracted with water, the coupling of the phytochemical hot water extraction with dilute acid pretreatment was examined. The addition of a 65 degrees C shikimic acid extraction step coupled to pretreatment with 0.98% H(2)SO(4) at 130 degrees C for 50 min resulted in 21% and 17% increases in xylose percent recovery from bark and de-barked wood, respectively. These results indicate that, in addition to recovering a high value product, the 65 degrees C wash step also increases xylose recovery.

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“…The key to avoiding these side reactions and controlling the furfural recovery and furfural loss was to shorten the residence time of furfural in the aqueous phase (Mao et al 2012). In the pretreatment process, sulfuric acid had a better catalytic effect because H2SO4 is a strong acid and was not easily evaporated, which made both depolymerization and dehydration occur simultaneously (Jensen et al 2008).…”

Section: Impact Of Sulfuric Acidmentioning

confidence: 99%

Efficient Production of Furfural from Corncob by an Integrated Mineral-Organic-Lewis Acid Catalytic Process

Zhang

et al. 2017

BioResources

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An M-O-L acid (mineral acid, organic acid, and Lewis acid)-catalyzed integrated process for furfural production from corncob was proposed to improve corncob conversion and furfural selectivity. First, the co-catalysts of sulfuric acid and acetic acid were investigated for their impact on furfural production. Sulfuric acid as a pretreatment catalyst was mixed with corncob before the experiment. Acetic acid, which is a byproduct of hemicellulose hydrolysis, was fed together with steam. The results showed that the cooperation of sulfuric acid and acetic acid decreased the total acid consumption dramatically. FeCl3·6H2O was also investigated as a cocatalyst in an effort to enhance the conversion of xylose to furfural and decrease furfural degradation. The integrated catalytic process achieved the highest furfural yield of 68.04% through the use of M-O-L acid under a reaction temperature of 180°C, 3v% acetic acid, 4.0 wt.% sulfuric acid of 0.6 mL/g liquid to solid ratio, and 5 g FeCl3·6H2O per 100 g of biomass.

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Kinetic characterization of biomass dilute sulfuric acid hydrolysis: Mixtures of hardwoods, softwood, and switchgrass

Cited by 55 publications

References 20 publications

Enhanced Endoglucanase Production by Bacillus aerius on Mixed Lignocellulosic Substrates

Enhanced Endoglucanase Production by Bacillus aerius on Mixed Lignocellulosic Substrates

Sweetgum (Liquidambar styraciflua L.): Extraction of Shikimic Acid Coupled to Dilute Acid Pretreatment

Efficient Production of Furfural from Corncob by an Integrated Mineral-Organic-Lewis Acid Catalytic Process

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