TGA-FTIR study on the slow pyrolysis of lignin and cellulose-rich fractions derived from imidazolium-based ionic liquid pre-treatment of sugarcane straw

Halder, Pobitra; Kundu, Sazal; Patel, Savankumar; Parthasarathy, Rajarathinam; Pramanik, Biplob Kumar; Paz‐Ferreiro, Jorge; Shah, Kalpit

doi:10.1016/j.enconman.2019.112067

Cited by 88 publications

(31 citation statements)

References 49 publications

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“…Halder et al investigated slow pyrolysis of regenerated cellulose‐rich material (RCRM) and recovered lignin by using imidazolium‐based IL pretreatment of sugarcane straw (SCS). [ 53 ] The research proves that [Emim][OAc] can destroy the hydrogen bonds of cellulose structure in SCS and produce amorphous cellulose II material. The dissolution mechanism of [Emim][OAc] is shown in Figure .…”

Section: Development Of Il Systems For Biomass Fractionationmentioning

confidence: 93%

“…The dissolution mechanism of [Emim][OAc] is shown in Figure 4. [53] Understanding the key effects of cations and anions in ILs is beneficial for developing more effective biomass fractionation solvent systems that are based on ILs. In recent years, the effects of cations and anions in ILs for biomass pretreatment efficiency are studied systematically.…”

Section: Selective Separation Of Cellulose-rich Materialsmentioning

confidence: 99%

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Novel Solvent Systems for Biomass Fractionation Based on Hydrogen‐Bond Interaction: A Minireview

Wang

Sheng

Song

et al. 2020

Advanced Sustainable Systems

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cellulose (30-50 wt%), hemicellulose (20-35 wt%), and lignin (15-30 wt%). [3] CO -C bonds are the main connection bond in the components, but between different components hydrogen bond is the main connection. [2b,4] Cellulose is the most abundant component composed by d-glucose units linked to each other via β-1,4-glycosidic bonds, a certain amount of cellulose shows ordered crystal structure. [5] Hemicellulose is composed with various polymerized monosaccharides, mainly are C5 (xylose, arabinose) and C6 sugars (mannose, glucose, and galactose), and others, which acts as a linkage distributing between cellulose and lignin. [6] Lignin is one kind of highly complicated cross-linked 3D amorphous resin, which is composed of three monolignols (p-coumaryl, alcohol, coniferyl alcohol, and sinapyl alcohol) connected by different CO -O bonds. [1a] Lignin mainly lies on the surface of cellulose and hemicellulose that ensures the structural integrity and rigidity of biomass. [3,7] Currently biomass catalytic conversion has achieved great success in breaking CO -C bond, so converting single component to platform chemicals or materials is quite close to industrialization. The key of efficient application of whole biomass becomes the separation of different components with high efficiency. Owing to the complex structure of biomass, biomass fractionation is the key process for the full and efficient utilization of this renewable resource. [8] In the previous reports, various solvent systems, such as strong dilute acid treatment, [9] alkaline treatment, [10] the sulphite pulping process, [11] and organosolv isolation, [12] were used to separate cellulose, hemicelluloses, lignin, and their derivatives. However, most of those traditional methods always cause serious environmental consequences and result in more cost in waste disposal owing to the application of large amounts of acids and bases. [13] By contrast, ionic liquids (ILs) [8a,b,14] and deep eutectic solvents (DESs) [4,15] are widely regarded as a green alternative solvent for their near-zero vapor pressure, high thermal stability, devisable structure, and excellent solvent power for biomass. [4b,8b,16] Not like acid or base pretreatment methods that need destruction and then fractionation of biomass components, ILs and DESs methods can achieve highly selective fractionation of biomass by controlling the functional structure of ILs or composition of DESs. [4b,8a,14b,16] According to the existing reports, many ILs and

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Section: Development Of Il Systems For Biomass Fractionationmentioning

confidence: 93%

Section: Selective Separation Of Cellulose-rich Materialsmentioning

confidence: 99%

Novel Solvent Systems for Biomass Fractionation Based on Hydrogen‐Bond Interaction: A Minireview

Wang

Sheng

Song

et al. 2020

Advanced Sustainable Systems

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“…Similar result on the formation of hydrogen bonds was also reported in the cellulose/IL system. [21] Therefore, the improved interfacial interactions between the SWCNTs and polymer components via IL lead to the high mechanical strength of the polymer interfaces which is sustained by the occurrence of fibrillation (Figure 5d and Figure S7, Supporting Information) on fracture surfaces after the tensile loading. [22] In sharp contrast, due to the weak adhesive interactions between bare SWCNT layers and polymer components (especially PVA), the IL-free composite is liable to form defects at the interfaces that transforms into cracks during the mechanical loading, which result in an inferior mechanical strength in comparison with IL composites.…”

Section: Mechanical Properties Of Flexible Filmsmentioning

confidence: 99%

Mechanically Robust and Flexible Films of Ionic Liquid‐Modulated Polymer Thermoelectric Composites

Deng

et al. 2021

Adv Funct Materials

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In the recent decade, polymer thermoelectric (TE) composite has witnessed explosive achievements to address energy generation and utilization. Besides the significant progress in enhancement of TE performance, the high mechanical property has received increasing attention, being important for practical applications in complex environments. However, the mechanical performance has always been improved at the sacrifice of TE performance, and vice versa, which poses a great challenge. Here, ionic liquid (IL)-assisted fabrication of flexible films of polymer TE composites with simultaneously high TE and mechanical performances based on poly(3,4-ethylenedioxythiophene):poly(styr enesulfonate) (PEDOT:PSS), polyvinyl alcohol (PVA), and single-walled carbon nanotubes (SWCNTs) are reported. The resultant composite shows a high TE performance with a power factor of 106.1 ± 8.2 µW m −1 K −2 at room temperature, and strong mechanical robustness with a tensile modulus of 4.2 ± 0.5 GPa and fracture strength of 136.5 ± 10.6 MPa. It is the most mechanically robust TE composite known with such a high power factor in the available literature. The present study provides a promising way to help address the longstanding and intractable issue of inferior mechanical performance of TE composites without compromising TE performance.

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“…For OSP, RH was heated to a high temperature instantaneously, which would result in the severe pyrolysis reactions except for polycondensation reaction inside the solid sample. 31,34,35…”

Section: Product Yields Of Tspmentioning

confidence: 99%

“…removing moisture and vitrification with low mass loss rate, and the depolymerization of holocellulose (hemicellulose and cellulose) started in this stage. 34 The first stage of S1-char was from room temperature to 300 C due to the removal of hemicellulose in the first step. The second stage of RH from 200 C to 415 C was the main decompose stage, where holocellulose decomposed rapidly with a high mass loss rate.…”

Section: Characteristics Of Charmentioning

confidence: 99%

Comparative study on the one‐step and two‐step pyrolysis of lignocellulosic biomass: Effects of two‐step pyrolysis on improving product quality

et al. 2021

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Two-step pyrolysis (TSP) and one-step pyrolysis (OSP) of rice husk was conducted using a fixed-bed reactor, and the product distribution and physicochemical property were analyzed. TSP had two fast pyrolysis processes, which were, respectively, set at lower temperature (400 C) in the first step and high temperature (550 C) in the second step, while OSP was only set at high temperature (550 C). Compared with OSP, TSP increased the total yields of char and gas but decreased the total yield of bio-oil. The pyrolysis process of the first step facilitated the cross-linking and polycondensation reactions in the char of the first step, thus inhibiting the decomposition of the char from the first step and decreasing the yield of bio-oil in the second step. Due to the high pyrolysis temperature, there was no significant difference between the char from the second step and the char from OSP. The first step improved the selectivity of acids, furans and phenols with complex side chains in bio-oil. The bio-oil from the second step had lower acidity, and higher selectivity of phenols and hydrocarbons. Compared with the gas product of OSP, the H 2 and CH 4 contents of the gas product from the second step were improved by more than 70% and 35%. TSP could not only improve the selectivity of value-added chemicals but also achieve the higher quality of gas and bio-oil as fuel.

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TGA-FTIR study on the slow pyrolysis of lignin and cellulose-rich fractions derived from imidazolium-based ionic liquid pre-treatment of sugarcane straw

Cited by 88 publications

References 49 publications

Novel Solvent Systems for Biomass Fractionation Based on Hydrogen‐Bond Interaction: A Minireview

Novel Solvent Systems for Biomass Fractionation Based on Hydrogen‐Bond Interaction: A Minireview

Mechanically Robust and Flexible Films of Ionic Liquid‐Modulated Polymer Thermoelectric Composites

Comparative study on the one‐step and two‐step pyrolysis of lignocellulosic biomass: Effects of two‐step pyrolysis on improving product quality

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