One-pot synthesis of a chemically functional magnetic carbonaceous acid catalyst for fermentable sugars production from sugarcane bagasse

Liang²,

International Journal of Polymer Science

et al. 2020

Diaper waste was calcined above 400°C after impregnated in the solution of nickel nitrate. The as-prepared diaper waste-derived materials were used as magnetic catalysts for the synthesis of glycerol carbonate (GC). Structure and catalytic ability investigations on the catalysts calcined at different temperatures indicated that calcination temperature was an important factor affecting the property of catalysts. It was found that the catalyst obtained at the calcination temperature of 700°C (named DW-Ni-700) showed the best performance. When DW-Ni-700 was used in the synthesis of GC, GC yield reached 93.2%, and the magnetic property of DW-Ni-700 facilitated the catalyst separation process. Meanwhile, DW-Ni-700 showed high reusability in the reaction. After four times reuse of DW-Ni-700, GC yield decreased less than 4%.

Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Using Diaper Waste to Prepare Magnetic Catalyst for the Synthesis of Glycerol Carbonate

Liang²,

International Journal of Polymer Science

et al. 2020

“…Here, we focus on developing the potential application of ChCl•formic acid. It was reported that the ratio of hydrogen bond receptors and hydrogen bond donors affects the intermolecular hydrogen bonds between DES and lignocellulose and thus affects the pretreatment results [30]. An examination of Fig.…”

Section: Optimization Of the Pretreatment Solventmentioning

confidence: 99%

Hydrolysis of corn stover pretreated by DESs with carbon-based solid acid catalyst

Hu¹,

Meng²,

Huang³

et al. 2020

SN Appl. Sci.

This study evaluated two hydrolysis strategies that involve a two-step and a one-pot process for the hydrolysis of cellulose. The two-step process consisted of cellulose pretreatment with deep eutectic solvent, followed by hydrolysis promoted by the carbon-based solid acid catalyst. The obtained results showed that the xylose and glucose yields were 33.9% and 6.9%, respectively, from corn stover based on this two-step strategy with ChCl •Formic acid used as the pretreatment solvent. For one-pot hydrolysis, side reactions occurred and less glucose accumulated in the reaction system. In this case, the maximum achieved glucose yield was 21.1% for the hydrolysis of microcrystalline cellulose. Graphic abstract The corn stover was pretreated with DES and then hydrolysed by carbon-based solid acid catalyst. Approximately 33.9% of xylose and 6.9% of glucose was recovered from corn stover with ChCl•Formic acid as the pretreatment solvent.

J of Chemical Tech & Biotech

“…Cellulose loss might be increased with too low pH value (<3.5) of the surrounding solution during biomass pretreatment. Therefore, the replacement of homogeneous acids by solid catalysts becomes a worthy direction to be carefully considered 12 …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the replacement of homogeneous acids by solid catalysts becomes a worthy direction to be carefully considered. 12 In this work, a carbonaceous solid acid Fe 3 O 4 @C-SO 3 H was used in the ethanol pretreatment of lignocellulose. The influence of catalyst usage, pretreatment temperature, and catalyst recovery on the performance of pretreatment and enzymatic hydrolysis were comprehensively evaluated, while the relationship of enzymatic digestibility with biomass particle size, compositions, and crystalline characteristics in lignocellulose was well revealed.…”

Section: Introductionmentioning

confidence: 99%

Combination of ethanol and Fe₃O₄@C‐SO₃H pretreatment of Eucalyptus for glucose release via enzymatic saccharification

Luo

Qian

Zhu

et al. 2020

BACKGROUND Enzymatic hydrolysis of lignocellulose is regarded as the most efficient route to producing fermentable sugars, one kind of promising future biofuel, while physiochemical pretreatment is the initial but most critical step for the efficient utilization of lignocellulose. RESULTS In this study, a recoverable carbonaceous solid acid catalyst Fe3O4@C‐SO3H was used in combined organosolv pretreatment of Eucalyptus biomass at 140–180 °C with 50 vol% ethanol. The introduction of solid acid in ethanol pretreatment remarkably alleviated the requirement of smaller biomass size, but provided less influence on cellulosic degradation, which benefited the subsequent enzymatic hydrolysis to glucose. After the pretreatment using 50 vol% ethanol and 20% catalyst at 160 °C, 60.3% hemicellulose and 52.6% lignin were removed from Eucalyptus (75–250 μm) within 60 min, which resulted in a cellulose retention ratio of >90% and improved hydrolysis efficiency by nearly 20 and 2 folds, respectively, compared to untreated and ethanol pretreated materials. CONCLUSION This study explored a novel pretreatment technique to improve the efficiency of enzymatic saccharification. It also demonstrated that the hydrolysis yield of cellulose had significantly positive correlation with the removal of lignin and hemicellulose in Eucalyptus, but was less affected by cellulose crystallinity. © 2020 Society of Chemical Industry