Pretreatment of empty fruit bunch from oil palm for fuel ethanol production and proposed biorefinery process

Tan, Li; Yu, Yongcheng; Li, Xuezhi; Zhao, Jian; Qu, Yinbo; Choo, Yuen May; Loh, Soh Kheang

doi:10.1016/j.biortech.2012.10.134

Cited by 82 publications

(40 citation statements)

References 29 publications

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“…In contrast, the extractive content increased with increasing reaction temperature. This phenomenon was also observed in hydrothermal and dilute acid pretreated eucalyptus [18] and bisulfite pretreated OPEFB [19]. The increase of the total extractive content of the pretreated OPEFB was due to some fragments of lignin and polysaccharides with lower molecular weights being re-precipitated on the fibers of the pretreated samples [18].…”

Section: Effect Of Pretreatment On Opefb Chemical Componentssupporting

confidence: 53%

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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Abstract. Developing an effective pretreatment for the conversion of lignocellulosic biomass to ethanol is an important effort in reducing the cost of this process. Microwave-assisted pretreatment is considered a green technology that can effectively break down lignocellulosic structures. The objective of this study was to investigate the most effective temperature for microwave-assisted oxalic acid pretreatment regarding the structural characteristic changes of oil palm empty fruit bunches (OPEFB) fibers. The fibers were subjected to microwave-assisted oxalic acid pretreatment at 160-200 °C with 2.5 minutes heating time and a liquid to solid ratio of 10. The effectiveness of the pretreatment was determined based on its delignification selectivity, morphological characteristics, and functional group changes. Microwave irradiation of OPEFB fibers at 180 ºC was effective in increasing the cellulose content by 24%. This pretreatment resulted in 1.82 delignification selectivity. More than 50% of the hemicellulose of the OPEFB was removed after this treatment, which was confirmed by a decrease of the absorption bands of functional groups at 1732 cm -1 . The increase of pretreatment temperature disrupted the morphological structure of the OPEFB and removed its hemicellulose but did not change its functional groups and lignin content.

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Section: Effect Of Pretreatment On Opefb Chemical Componentssupporting

confidence: 53%

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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“…The cellulose (Cel) and hemicellulose (Hem) mass composition were obtained using the equations reported by Tan et al (2013), correlating the concentration of glucose (Gluc), xylose (Xyl) and arabinose (Arab), acquired from High-Performance Liquid Chromatography (HPLC), in a Shimadzu Chromatograph equipped with an Aminex HPX-87H column, working in a furnace at 60°C. Mobile phase was sulfuric acid (5 mM) at rate of 6 ml min À1 with an IR detector.…”

Section: Analysis Of Carbohydrates and Total Ligninmentioning

confidence: 99%

“…They altogether account for roughly 85% of the world oil palm production representing 53,500 million tonnes (Mohammed et al, 2012;Singh et al, 2013;Tan et al, 2013). In South America, Brazil is the third largest producer after Colombia and Ecuador, producing 340 million tonnes, representing 0.58% of the worldwide oil palm production (data from: 'www.indexmundi.com ', 2015 accessed: 13-04-2015).…”

Section: Introductionmentioning

confidence: 99%

Lignin preparation from oil palm empty fruit bunches by sequential acid/alkaline treatment – A biorefinery approach

Medina

Woiciechowski

Filho

et al. 2015

Bioresource Technology

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“…These pretreatments break the internal lignin and hemicellulose bonds and separate the lignin and hemicellulose fractions that potentially can be converted to useful products. Several investigations have reported very promising results for processes such as alkaline pretreatment [10-12], aqueous ammonia-soaking pretreatment [13], low-acid pretreatment [14], steam pretreatment [2], and sequential pretreatment with diluted acid and then alkali [15]. However, nonetheless, they require further study and testing in order to fulfill specific EFB biorefinement needs [10-15], obtain high glucose yields in enzymatic hydrolysis, and simplify the pretreatment process without ignoring economic concerns.…”

Section: Introductionmentioning

confidence: 99%

Optimization of NaOH-catalyzed steam pretreatment of empty fruit bunch

Choi

Park

Lee

et al. 2013

Biotechnol Biofuels

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BackgroundEmpty fruit bunch (EFB) has many advantages, including its abundance, the fact that it does not require collection, and its year-round availability as a feedstock for bioethanol production. But before the significant costs incurred in ethanol production from lignocellulosic biomass can be reduced, an efficient sugar fractionation technology has to be developed. To that end, in the present study, an NaOH-catalyzed steam pretreatment process was applied in order to produce ethanol from EFB more efficiently.ResultsThe EFB pretreatment conditions were optimized by application of certain pretreatment variables such as, the NaOH concentrations in the soaking step and, in the steam step, the temperature and time. The optimal conditions were determined by response surface methodology (RSM) to be 3% NaOH for soaking and 160°C, 11 min 20 sec for steam pretreatment. Under these conditions, the overall glucan recovery and enzymatic digestibility were both high: the glucan and xylan yields were 93% and 78%, respectively, and the enzymatic digestibility was 88.8% for 72 h using 40 FPU/g glucan. After simultaneous saccharification and fermentation (SSF), the maximum ethanol yield and concentration were 0.88 and 29.4 g/l respectively.ConclusionsDelignification (>85%) of EFB was an important factor in enzymatic hydrolysis using CTec2. NaOH-catalyzed steam pretreatment, which can remove lignin efficiently and requires only a short reaction time, was proven to be an effective pretreatment technology for EFB. The ethanol yield obtained by SSF, the key parameter determining the economics of ethanol, was 18% (w/w), equivalent to 88% of the theoretical maximum yield, which is a better result than have been reported in the relevant previous studies.

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Pretreatment of empty fruit bunch from oil palm for fuel ethanol production and proposed biorefinery process

Cited by 82 publications

References 29 publications

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Lignin preparation from oil palm empty fruit bunches by sequential acid/alkaline treatment – A biorefinery approach

Optimization of NaOH-catalyzed steam pretreatment of empty fruit bunch

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