Synergistic Effects of Pretreatment Process on Enzymatic Digestion of Rice Straw for Efficient Ethanol Fermentation

Kahar, Prihardi

doi:10.5772/54949

Cited by 24 publications

(18 citation statements)

References 53 publications

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“…5a). The crystallinity also increased marginally with increased delignification time, from 52 % in 1 h to 57 % in 6 h. The changes in the XRD crystallinity upon the sodium chlorite delignification are similar to the previous report on acidchlorite delignification of rice straw [20]. Additionally, when the crystal size was calculated from the XRD FWHM of (200) peak, it increased from 2.0 to 2.4 nm over the 6-h treatment ( Table 2), which is not as drastic as in oxygen delignification (a 1.0 nm increase) carried out at a higher temperature.…”

Section: Change In Crystalline Cellulose During Sodium Chlorite Deligsupporting

confidence: 89%

“…3b(c-e)). The decreased intensities of these peaks are in agreement with the role of sodium chlorite in decreasing lignin content from the ground hardwood [20]. On the other hand, the heat treatment with oxygen at 130°C has a very mild effect on lignin peaks (Fig.…”

Section: Change In Surface Functional Groupssupporting

confidence: 81%

“…The IR spectra of hardwood after a high-temperature treatment without reactive agents show noticeable changes in the fingerprint region. For example, the untreated hardwood shows distinct ester carbonyl peaks at 1735 and 1260 cm −1 [10,44], and C-OH deformation and C-O stretching of phenolics at~1241 cm −1 [20]; their intensities are reduced after the treatment at 130°C (Fig. 3a(b)).…”

Section: Change In Surface Functional Groupsmentioning

confidence: 92%

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Effects of Delignification on Crystalline Cellulose in Lignocellulose Biomass Characterized by Vibrational Sum Frequency Generation Spectroscopy and X-ray Diffraction

et al. 2015

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Delignification, a common practice in the pulping industry, has been proposed and explored as a means to selectively remove lignin from lignocellulosic biomass and, thus, increase enzyme accessibility for cellulose hydrolysis. However, without knowing structural changes of cellulose in biomass, it is difficult to fully understand the effects of the delignification process on cellulose hydrolysis. In this study, the amount and aggregation of crystalline cellulose in hardwood biomass delignified using oxygen and sodium chlorite as reactive agents were examined with vibrational sum frequency generation (SFG) spectroscopy and X-ray diffraction (XRD). The results indicated that the amount of crystalline cellulose and the XRD crystallite size increased with both oxygen and chlorite delignification processes. In addition, the Bα-cellulose equivalent^fraction estimated by SFG spectroscopy increased greater than glucan amount with the delignification process. Changes in crystal size might be due to the aggregation of cellulose crystals, along with the increase in crystalline cellulose amount.

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Section: Change In Crystalline Cellulose During Sodium Chlorite Deligsupporting

confidence: 89%

Section: Change In Surface Functional Groupssupporting

confidence: 81%

Section: Change In Surface Functional Groupsmentioning

confidence: 92%

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Effects of Delignification on Crystalline Cellulose in Lignocellulose Biomass Characterized by Vibrational Sum Frequency Generation Spectroscopy and X-ray Diffraction

et al. 2015

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“…The vat was warmed for two hours at a temperature of 35 °C followed by thorough water wash to remove sodium hydroxide. 36 g of sodium chlorite solution dissolved in 1800 mL of water was then poured to the treated mass and kept for two hours at this temperature [28]. Delignification was continuously monitored by the addition of glacial acetic acid at various intervals at a temperature of about 80 °C with gentle swirling until the samples were chemically judged to be sufficiently delignified.…”

Section: Preparation Of Flame Retardant Rice Strawmentioning

confidence: 99%

Free radical induced grafting of acrylonitrile on pre-treated rice straw for enhancing its durability and flame retardancy

Mukherjee

Halder

Datta

et al. 2017

Journal of Advanced Research

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“…All native cellulose has been classified as cellulose type I [6]. Studies showed that cellulose type I has intra-molecular hydrogen bond for O(2)HO(6) and O(3)HO(5) and the inter-molecular hydrogen bond for O(6)HO(3') as shown in figure 2 [12][13]. Inter-molecular and intra-molecular hydrogen bonding in cellulose type I Microcrystalline cellulose (MCC) is defined as a purified, partially depolymerized non-fibrous form of cellulose.…”

Section: -2506mentioning

confidence: 99%

Thermal Characteristics of Microcrystalline Cellulose From Oil Palm Biomass

Kuthi

Norzali

Badri³

2016

MJAS

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Extracted cellulose from oil palm empty fruit bunch fiber (OPEFB) was subjected to acid hydrolysis in producing microcrystalline cellulose (MCC). The acid hydrolysis was conducted using 1 % (v/v) sulfuric acid (H 2 SO 4 ) at varying temperatures of 120, 130 and 140 °C for an hour. The relationship between the thermal behavior and physical properties was investigated by thermogravimety (TGA/DTG) and differential scanning calorimetry (DSC) as well as x-ray diffractometry (XRD). The hydrolyzed MCC at 120 °C (MCC A ) showed the highest thermal stability temperature and percentage of crystallinity at 250 °C and 65.07% respectively. However, hydrolyzed MCC at 130 °C (MCC B ) and 140 °C (MCC C ) exhibited low thermal stability temperature at 225 °C and 220 °C respectively. The percentage of crystallinity obtained for MCC B and MCC C was 61.18% and 60.64% respectively. This study revealed that the degree of crystallinity for cellulose has positive impact on the thermal degradation temperature of the OPEFB-MCC.Keywords: acid hydrolysis, microcrystalline cellulose, oil palm empty fruit bunch, thermal behavior Abstrak Selulosa yang diestrak dari serabut tandan kosong sawit (STKS) dihidrolisis menggunakan asid bagi menghasilkan mikrokristal selulosa (MKS). Hidrolisis berasid dijalankan dengan menggunakan 1 % (v/v) asid sulfurik (H 2 SO 4 ) pada suhu yang divariasikan iaitu 120, 130 dan 140 °C selama sejam. Hubungan antara sifat terma dan sifat fizikal dikaji berdasarkan analisis termogravimetri (TGA/DTG), anlisis kalorimetri imbasan kebezaan (DSC) serta kaedah pembelauan sinar-X (XRD). Peningkatan suhu hidrolisis menunjukkan kesan yang kontra terhadap sifat terma STKS-MKS. MKS yang dihidrolisis pada suhu 120 °C (MKS A ) menunjukkan suhu kestabilan terma dan peratus kehabluran yang paling tinggi iaitu masing-masing pada 250 °C dan 65.07%. MKS yang dihdrolisis pada 130 °C (MKS B ) dan 140 °C (MKS C ) mempamerkan suhu kestabilan terma yang rendah iaitu masing masing pada suhu 225 °C dan 220 °C. Peratus kehabluran yang diperoleh bagi MKS B dan MKS C masing-masing adalah 61.18% dan 60.64%. Kajian ini memberi indikasi bahawa darjah kehabluran selulosa memberi kesan positif kepada suhu degradasi terma TKKS-MKS.

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Synergistic Effects of Pretreatment Process on Enzymatic Digestion of Rice Straw for Efficient Ethanol Fermentation

Cited by 24 publications

References 53 publications

Effects of Delignification on Crystalline Cellulose in Lignocellulose Biomass Characterized by Vibrational Sum Frequency Generation Spectroscopy and X-ray Diffraction

Effects of Delignification on Crystalline Cellulose in Lignocellulose Biomass Characterized by Vibrational Sum Frequency Generation Spectroscopy and X-ray Diffraction

Free radical induced grafting of acrylonitrile on pre-treated rice straw for enhancing its durability and flame retardancy

Thermal Characteristics of Microcrystalline Cellulose From Oil Palm Biomass

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