Optimized phosphotungstic acid pretreatment for enhancing cellulase adsorption and biomass saccharification in corn stover

Chen, Binghui; Wang, Ziqi; Jin, Zi-Chu; Gou, Zechang; Tang, Shanshan; Yu, Xiaoxiao; Chen, Huan; Chen, Guang; Su, Yingjie

doi:10.1007/s13399-021-01849-4

Cited by 4 publications

(4 citation statements)

References 55 publications

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“…After that, by increasing the reaction temperature, prolonging the reaction time, or increasing the concentration of PTA, the lignin removal rate did not change significantly, but the cellulose retention rate showed a downward trend. Previous research found that 14.3-89.7% of hemicellulose in biomass can be removed by pretreatment with phosphotungstic acid as a catalyst, and the removal rate of hemicellulose is negatively correlated with the retention rate of cellulose [20,32,33]. The results of this study are consistent with previous studies.…”

Section: Second Pretreatment With Ptasupporting

confidence: 91%

“…Compared with spectrum a, the intensity of the above peaks was significantly weaker in spectra b and c because the hemicellulose content of the pretreated samples was significantly reduced compared to the control. Moreover, the -OCH3 of lignin was observed at 1425 and 1458 cm −1 [13,32] in all spectra. After pretreatment, the intensity of the above peaks for Samples 3 and 14 did not change significantly.…”

Section: Ft-ir Analysismentioning

confidence: 79%

“…Figure 4 shows the FT-IR spectra of different samples. In all spectra, absorption at 1114 and 897 cm −1 was attributed to the C-OH skeletal vibration [26] and β-1,4 glycosidic bond of cellulose [32,40]. Compared with spectrum a (control), the intensity of the above peaks was significantly enhanced in spectra b (Sample 3) and c (Sample 14), which was related to the increased cellulose content in the treated samples.…”

Section: Ft-ir Analysismentioning

confidence: 88%

“…In addition, there is no consensus on the effect of PTA treatment on the CrI value of biomass. Chen et al [32] found that the CrI of PTA-treated corn stover was 16.7% lower than that before pretreatment. In contrast, Xie et al [33] found that the CrI of corn straw treated with PTA increased by 48.6-64.9%.…”

Section: Xrd Analysismentioning

confidence: 99%

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A Combination Method of Liquid Hot Water and Phosphotungstic Acid Pretreatment for Improving the Enzymatic Saccharification Efficiency of Rice Straw

et al. 2022

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Chemical pretreatment can significantly improve the enzymatic hydrolysis efficiency of lignocellulosic biomass, thereby improving the yield of sugar materials for the production of cellulosic ethanol, but commonly used acid–base catalysts are difficult to recover and reuse. In this work, a combination method of liquid hot water (LHW) and phosphotungstic acid (PTA) pretreatment was performed to improve the saccharification efficiency of rice straw, and we attempted to evaluate the reuse effect of PTA catalysts. The rice straw was first treated with LHW at 180 °C for 90 min, and then treated with 20 mM PTA at 130 °C for 60 min. After pretreatment, the cellulose hydrolysis efficiency and glucose recovery of the rice straw increased by 201.85% and 164.25%, respectively. Glucose accounted for 96.8% of the total reducing sugar in the final enzymatic hydrolysate. After each PTA pretreatment, approximately 70.8–73.2% of the PTA catalyst could be recycled. Moreover, the catalytic activity of the PTA catalyst that had been used five times did not decrease. The improved enzymatic saccharification efficiency was attributed to the removal of 89.24% hemicellulose and 21.33% lignin from the lignocellulosic substrate. The two-step LHW-PTA pretreatment could pretreat biomass in the field of cellulosic ethanol production.

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Section: Second Pretreatment With Ptasupporting

confidence: 91%

Section: Ft-ir Analysismentioning

confidence: 79%