Switchgrass pretreatment and hydrolysis using low concentrations of formic acid

Marzialetti, Teresita; Miller, Stephen J.; Jones, Christopher W.; Agrawal, Pradeep

doi:10.1002/jctb.2573

Cited by 31 publications

(17 citation statements)

References 41 publications

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“…Organic acids such as acetic acid and formic acid are eco-friendly reagents, less corrosive, and effective for the pretreatment of lignocellulosic biomass, and they provide a more stable medium for monosaccharide in the aqueous phase as compared to sulfuric acid (Marzialetti et al 2011). Formic acid could be recovered easily after the complete delignification with multiple additions of water, and the process is economical and easy to control at low operating temperature and pressure (Li et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Extraction and Characterization of Cellulose from Oil Palm Empty Fruit Bunches

Nazir

Wahjoedi

Yussof³

et al. 2013

BioRes

227

105

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Cellulosic fibers in Oil Palm Empty Fruit Bunches (OPEFB) are tightly packed with lignin, hemicelluloses, small depositions of wax, and inorganic elements. In the present work, eco-friendly reagents with low concentrations of 20% (v/v) formic acid and 10% (v/v) of 30% hydrogen peroxide were employed at 85 o C for the extraction of cellulose from OPEFB. The yield of 64% (w/w) achieved was among the highest ever reported. Based on the XRD, the -cellulose content was 93.7% with a high crystallinity of 69.9%. The average diameter was 13.5 μm with structural evidence of separated fibrils as investigated by FESEM. The TEM analysis suggested that the material was crystalline and its geometry was a monoclinic structure. The FTIR spectral peaks representing wax and hemicelluloses at 1735 cm -1 and 1375 cm -1 , respectively, and lignin at 1248 cm -1 and 1037 cm -1, were not observed in the extracted OPEFB-cellulose spectra. Based on the TGA results, thermal stability at 325 o C with a single degradation curve suggests the purity of OPEFB-cellulose.

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Section: Introductionmentioning

confidence: 99%

Eco-Friendly Extraction and Characterization of Cellulose from Oil Palm Empty Fruit Bunches

Nazir

Wahjoedi

Yussof³

et al. 2013

BioRes

227

105

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“…Studies on organic acids for biomass pretreatment have tested a wide range of pretreatment severities that are much higher than can be expected during wet storage: acid concentrations from 1 to 80% wt; temperatures of 100-210 • C; and retention time of 10 min to 1 h (Kootstra et al, 2009;Lee and Jeffries, 2011;Marzialetti et al, 2011;Barisik et al, 2016). Furthermore, the organic acids that are dominant during wet storage are not those typically explored for conventional pretreatment.…”

Section: Organic Acid Profilementioning

confidence: 99%

“…These inorganic acids have been extensively explored for the pretreatment of lignocellulosic feedstocks under various temperatures, pressures and times (Jacobsen and Wyman, 2000;Tanjore and Richard, 2015;Kumar and Sharma, 2017). Various organic acids,-maleic, oxalic, succinic, fumaric, formic,-have also been explored for pretreatment of biomass (Kootstra et al, 2009;Lee and Jeffries, 2011;Marzialetti et al, 2011;Barisik et al, 2016). However, there are important differences between wet storage (organic) acid treatment and conventional (inorganic) pretreatment in terms of both temperature and time.…”

Section: Introductionmentioning

confidence: 99%

Wet Corn Stover Storage: Correlating Fiber Reactivity With Storage Acids Over a Wide Moisture Range

et al. 2018

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Wet storage is synonymous with ensilage, a simple biotechnology that has been used to preserve forage for livestock feed for millennia. In this natural process, organic acids are produced by anaerobic microbial degradation of a small fraction of the biomass, and these acids reduce the pH to levels that minimize further microbial activity and can preserve the biomass for years as long as anaerobic conditions are maintained. These organic acids also result in mild pretreatment with potential to enhance downstream conversion processes, making this an effective storage strategy. However, the degree and significance of this natural pretreatment capability of ensiled storage on downstream processes has not previously been quantified across a range of storage conditions. In this study, the degree of pretreatment was investigated by measuring the reactivity of corn stover fiber to cellulolytic enzymes. Although the results indicated significant improvement in hydrolytic outcomes after wet storage, by a factor of up to 2.4, saccharification of cellulose to sugar monomers was still limited. The results also show that dominance of lactic acid in the ensilage process is key to wet storage (pretreatment) effectiveness as in the livestock feed industry. Lactic acid pKa value is lower than the pKa of other silage acids and lower than typical silage pH. This gives lactic acid the advantage of being in the more dissociated form, with more protons available to facilitate pretreatment hydrolysis. However, unlike the livestock feed industry, where quality feedstock is attainable within very narrow storage moisture range, for biofuel purposes, a wider range of 35-65% is appropriate in achieving a similar quality outcome. This is true both for the immediate fiber response to enzymes and with subsequent pretreatment. This wider moisture range implies more flexibility in harvest schedule without sacrificing feedstock quality, thus alleviating concerns over feedstock quality that biomass suppliers or biorefineries may have.

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“…There are many ways to separate cellulose from rice husk such as formic acid or alkali treatments. Various reports showed that high concentrations (above 10%) of formic acid can depolymerize 50-95% of hemicelluloses and 70-90% of lignin at 60-130 o C within 8 h. [32][33][34][35][36][37][38][39][40] Though cellulose has been extracted successfully from RH through alkali treatments and bleaching, using them to obtain disordered carbons and further prepared anode materials has been seldom reported before. [41,42] Enlightened by these researches, in this paper, we proposed a facile and environmental harmony strategy to synthesis HCNs by using RH cellulose as carbon precursors.…”

Section: Introductionmentioning

confidence: 99%

Cellulose‐Derived Hollow Carbonaceous Nanospheres from Rice Husks as Anode for Lithium‐Ion Batteries with Enhanced Reversible Capacity and Cyclic Performance

2017

ChemistrySelect

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Disordered carbons are widely used as anode materials for lithium‐ion batteries due to their stable cycle performance, high specific capacity and negative redox potentials. Among them, as an environmental friendly renewable source, biomass has attracted much attention for its application in the preparation of disordered carbon. We report a novel carbonaceous material with interconnected hollow nanosphere structure which used cellulose extracted from rice husk (RH) as a precursor and prepared through hydrothermal carbonization and high temperature calcination. When used as anodes for lithium‐ion batteries, the first discharge specific capacity is as high as 1040 mAhg−1 at a rate of 0.2 C and the reversible specific capacity stabilized at 489 mAhg−1 after 100 cycles. The novel disordered nanostructure material displays superior Lithium‐ion battery performance with large reversible capacities, excellent cyclic performance, and outstanding rate capability, highlighting the importance of hollow interconnected structure for maximum utilization of electrochemically active for energy storage applications in high‐performance lithium‐ion batteries.

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Switchgrass pretreatment and hydrolysis using low concentrations of formic acid

Cited by 31 publications

References 41 publications

Eco-Friendly Extraction and Characterization of Cellulose from Oil Palm Empty Fruit Bunches

Eco-Friendly Extraction and Characterization of Cellulose from Oil Palm Empty Fruit Bunches

Wet Corn Stover Storage: Correlating Fiber Reactivity With Storage Acids Over a Wide Moisture Range

Cellulose‐Derived Hollow Carbonaceous Nanospheres from Rice Husks as Anode for Lithium‐Ion Batteries with Enhanced Reversible Capacity and Cyclic Performance

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