Concerns on Analytical Results Involving Infrared to Microscopic Data Dealing with Ionic Liquids in Pretreatment of Lignocellulosic Biomass

Azizan, Amizon; Mokti, Nawwarah; Zaharudin, Salwa; Safaai, Nor Sharliza Mohd

doi:10.4028/www.scientific.net/kem.797.211

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…The intensity of this peak has been decreased in the pretreated biomass, which may be due to the hemicellulose removal. The sharp peak at 1727 cm -1 denoted the C=O stretching of acetyl or carboxylic acid that was associated with hemicellulose, which decreased after the pretreatment process [26,35]. The peak of 1610 cm -1 is assigned to the C=C stretching vibration together with the asymmetric-stretching vibration in the aromatic ring of COOH that refers to the relation of cellulose, hemicellulose, and lignin [36,37].…”

Section: Biophysical Characterization Of Coffee Husk Biomassmentioning

confidence: 99%

Process Optimization of Deep Eutectic Solvent Pretreatment of Coffee Husk Biomass

Areeya,

Gundupalli,

Dharmalingam

et al. 2023

E3S Web Conf.

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The increased processing of coffee beans has generated huge amount of coffee husk, which are improperly disposed. Inappropriate disposal of coffee husk has led to release of toxic compounds to the environment causing serious environmental concerns. To mitigate the impact of improperly disposed coffee husk, it is suggested for valorisation of the coffee husk. Hence, this study has focussed on identifying the potential of coffee husk in maximizing the sugar yield from it which can be converted to value added product. Deep eutectic solvent (DES) involving choline chloride and lactic acid (ChCl:LA) mixed at 1:4 molar ratio was studied to investigate the effect of DES pretreatment on coffee husk to produce reducing sugar in the hydrolysis process. Pretreatment conditions of the biomass were optimized for biomass loading (5-20%, w/w), temperature (70-120 °C), and duration (60-240 min) using Response Surface Methodology (RSM) for obtaining maximum yield of reducing sugar. The RSM model predicted an optimal pretreatment condition of biomass loading with 20% (w/w), pretreated at 120 °C for 231.80 min to achieve maximum sugar yield (30.522%). The pretreatment effect on biomass composition was analyzed using the Van Soest method, which showed an increase in the cellulose content along with the hemicellulose removal when compared with the native biomass. Moreover, evaluation of chemical structural changes also confirmed the effectiveness of DES pretreatment. Thus, the current study would illustrate the potential of coffee husk to produce value-added compounds from it.

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Section: Biophysical Characterization Of Coffee Husk Biomassmentioning

confidence: 99%

Process Optimization of Deep Eutectic Solvent Pretreatment of Coffee Husk Biomass

Areeya,

Gundupalli,

Dharmalingam

et al. 2023

E3S Web Conf.

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Pretreatment and Bioprocess Trials in Various Reactor System on Lignocellulosic Biomass for Cellulosic Biomaterials

Azizan

Jusri²,

Azmi³

et al. 2021

Sci. Res. J.

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Pretreatment on lignocellulosic biomass prior to extraction of biomaterials, degradation of bioproduct, or production of biomaterial/bioproduct/biofuel, crucially influences the intended outcomes. The pretreatment of oil palm fronds (OPF), one of the most abundant agriculture residues in Malaysia, can be conducted based on the need of the methodology, either for small, lab, pilot, or industrial scales. In this article, examples of reactors for the pretreatment for instance microreactor (Bioshake iQ), conical shake flask, and mini-cylindrical reactor scale (fabricated) as well as the monitoring bioreactor (BlueSens Monitoring GmbH) reactor system dedicated for fermentation process using the outcome material from pretreatment process, are presented. All pretreatment trials with ionic liquid (IL) of 1-ethyl-3-methylimidazolium acetate [EMIM]Ac on OPF were conducted with a scaling-up strategy from micro-to-macro to fabricated reactors, monitoring Crystallinity Index (CrI) and Lateral Order Index (LOI). Electron beam irradiation pretreatment using 1000kGy was also tested in macroscale mode for CrI and LOI. Effectiveness of approximately 23 to 37% of CrI via microreactor experiments using 50, 70, and 90% v/v of [EMIM]Ac and at a temperature of 99oC was observed. Higher concentration of IL and temperature with nearly insignificance of solid loading of OPF in reaction liquid to the increase of the amorphous level of OPF was reported by macroscale mode in the 570-mL fabricated reactor. A short oxygen uptake rate (OUR) phase was observed in a 500-mL BlueSens shake flask with the real-time monitoring systems for 45-mL working volume, a nearly 10% of the total reactor volume for saccharification-fermentation using Escherichia coli K011 ATCC 55124 on approximately 2.22% w/v pretreated OPF from macroscale mode. Various data examples from these micro-to-macro scales including in a fabricated reactor system mode are crucially needed for further observations prior to pilot or industrial scales, needing a systematic data collection to be simulated and investigated in the future.

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Concerns on Analytical Results Involving Infrared to Microscopic Data Dealing with Ionic Liquids in Pretreatment of Lignocellulosic Biomass

Cited by 2 publications

References 10 publications

Process Optimization of Deep Eutectic Solvent Pretreatment of Coffee Husk Biomass

Process Optimization of Deep Eutectic Solvent Pretreatment of Coffee Husk Biomass

Pretreatment and Bioprocess Trials in Various Reactor System on Lignocellulosic Biomass for Cellulosic Biomaterials

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