Liquid hot water pretreatment of lignocellulosic biomass for bioethanol production accompanying with high valuable products

Zhuang, Xinshu; Wang, Wen; Yu, Qiang; Qi, Wei; Wang, Qiong; Tan, Xuesong; Zhou, Guangyan; Yuan, Zhenhong

doi:10.1016/j.biortech.2015.08.051

Cited by 250 publications

(83 citation statements)

References 69 publications

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“…Currently, there is numerous pretreatment process of lignocellulosic biomass decomposition which had been developed by many researchers, to gain an efficient pretreatment of biomass [4]. In this paper, acid pretreatment is chosen because the advantages of diluteacid hydrolysis are the relatively low acid consumptions, limited problems associated with equipment corrosion and less energy demanding for acid recovery.…”

Section: Introductionmentioning

confidence: 99%

Sustainability assessment of xylitol production from empty fruit bunch

et al. 2019

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Empty fruit bunch (EFB), one of the wastes from palm oil production, can be utilized into fuels and chemicals. The aim of this paper is to find the optimum capacity to produce xylitol from EFB. The optimum capacity was found by simultaneously considering its profitability, hazard potential and environmental performances. The process was developed and simulated using Aspen Plus to analyze its technical challenges and economic performances, covering net present values, internal rate of returns and payback period. On the other hand, hazard identification and ranking (HIRA) was used to evaluate its safety performances, while Simapro V.8.5.2 was used to assess the environmental impact via a life cycle assessment (LCA). The results show that the high consumption of steam in chemical hydrogenation causes the main contribution of Global warming potential (GWP) by 62%. This acid pre-treatment is also considered the most toxic part of the process while the hydrogenation of xylitol is the most hazardous part based on fire and explosion perspectives. Then, multi-objective optimization using Genetic Algorithm (GA) was performed in Matlab to find the optimum capacity. The methodology and result of this work lay the foundation of future works in utilizing.

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Section: Introductionmentioning

confidence: 99%

Sustainability assessment of xylitol production from empty fruit bunch

et al. 2019

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“…This method has proved to be very effective on sugarcane bagasse, wheat and rye straw, corncobs, and corn stover. Different terms like solvolysis, aqueous fractionation, aquasolv, and hydrothermolysis are used by different researchers to describe this pretreatment method [42,60,91]. Based on biomass flow direction and water flow direction into reactor, liquid hot water pretreatment can be performed in three different ways.…”

Section: Liquid Hot Water (Lhw)mentioning

confidence: 99%

Different Pretreatment Methods of Lignocellulosic Biomass for Use in Biofuel Production

Aftab¹,

Iqbal²,

Riaz³

et al. 2019

Biomass for Bioenergy - Recent Trends and Future Challenges

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Lignocellulosic biomasses are carbon neutral and abundantly available renewable bioresource material available on earth. However, the main problem that hinders its frequent use is the tight bonding within its constituents that include cellulose, hemicellulose, and lignin. The selection of pretreatment process depends exclusively on the application. Various pretreatment processes are primarily developed and utilized in effective separation of these interlinked components to take maximum benefit from the constitutes of the lignocellulosic biomasses especially for the production of biofuel. The major pretreatment methods include physical, chemical, thermophysical, thermochemical, and biological approaches. Various aspects of these different pretreatment approaches are discussed in this chapter.

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“…The general biorefinery concept focuses on the production of a variety of goods, including fuels, power, materials, and chemicals, from different biomass sources using integrated technologies [9,10]. Pretreatment has become the prerequisite and central unit of operation in the biorefinery process [11][12][13] to effectively utilize each component of lignocellulose biomass [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pre-Corrected pH on the Carbohydrate Hydrolysis of Bamboo during Hydrothermal Pretreatment

Huang

Yang

et al. 2020

Polymers

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To confirm the prospects for application of pre-corrected pH hydrothermal pretreatment in biorefineries, the effects of pH on the dissolution and degradation efficiency of carbohydrates were studied. The species composition of the hydrolysate was analyzed using high efficiency anion exchange chromatography and UV spectroscopy. The result showed that the greatest balance between the residual solid and total dissolved solids was obtained at pH 4 and 170 • C. Maximum recovery rates of cellulose and lignin were as expected, whereas hemicellulose had the least recovery rate. The hemicellulose extraction rate was 42.19%, and the oligomer form accounted for 93.39% of the product. The physicochemical properties of bamboo with or without pretreatment was characterized. Compared with the traditional hydrothermal pretreatment, the new pretreatment bamboo has higher fiber crystallinity and thermal stability. In the pretreatment process, the fracture of β-aryl ether bond was inhibited and the structural dissociation of lignin was reduced. The physicochemical properties of bamboo was protected while the hemicellulose was extracted efficiently. It provides theoretical support for the efficient utilization of all components of woody biomass.Polymers 2020, 12, 612 2 of 16 environmentally benign process that has been widely used for lignocellulose biomass pretreatment [15]. At present, the research on hydrothermal pretreatment focuses not only on wood materials, but also on bamboo and other non-wood materials [16,17]. The hemicellulose of bamboo was extracted in large quantities during the pretreatment, which effectively promoted the enzymatic hydrolysis efficiency [18]. However, during the hydrothermal pretreatment of bamboo, the degradation of cellulose increased with the dissolution of hemicellulose [17]. Many factors considerably influence the hydrothermal pretreatment of biomass, such as the physical properties of the biomass and the physical and chemical properties [19]. Other factors include the type of reactor and the catalyst. The hydroxyaldehyde condensation reaction can be easily achieved under alkaline conditions [20,21]. Acidic conditions were found to be suitable for dehydration [22]. Sulfuric acid and sodium hydroxide have been used to change the acid-base environment of the reaction. By adjusting the pH, the reaction direction can affect the direction to effective products [23]. High value utilization of woody biomass was promoted by hydrothermal pretreatment. For example, the separation and purification of cellulose were enhanced. The nanocellulose was prepared by oxidation of cellulose [24,25]. The application of nanocomposites was promoted by surface modification/surfactant polymerization of nanocellulose [26,27].A novel, pre-corrected pH hydrothermal pretreatment was performed to integrate pH control without additional steps or equipment, resulting in the best balance between the residual solid and dissolved solid [3]. A buffer system was established by pre-correcting the pH value of the extraction solution. It...

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Liquid hot water pretreatment of lignocellulosic biomass for bioethanol production accompanying with high valuable products

Cited by 250 publications

References 69 publications

Sustainability assessment of xylitol production from empty fruit bunch

Sustainability assessment of xylitol production from empty fruit bunch

Different Pretreatment Methods of Lignocellulosic Biomass for Use in Biofuel Production

Effect of Pre-Corrected pH on the Carbohydrate Hydrolysis of Bamboo during Hydrothermal Pretreatment

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