Alkaline pretreatment and the synergic effect of water and tetralin enhances the liquefaction efficiency of bagasse

Li, Zhixia; Cao, Jiangfei; Huang, Kai; Hong, Yaming; Li, Cunlong; Zhou, Xinxin; Xie, Ning; Lai, Fang; Shen, Fang; Chen, Congjin

doi:10.1016/j.biortech.2014.11.043

Cited by 29 publications

(21 citation statements)

References 27 publications

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“…The first stage -pretreatment -is performed in alkaline conditions with excess of alkaline reactant thus, the second stage -HTL -will also be carried out in alkaline environment. Such an alkaline environment is beneficial for both biomass pretreatment and liquefaction, as it may increase the biomass degradation effect, the biomass conversion and the biocrude yield while reducing the gas and solid products formation [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Two-stage alkaline hydrothermal liquefaction of wood to biocrude in a continuous bench-scale system

Sintamarean

Grigoras

Jensen³

et al. 2017

Biomass Conv. Bioref.

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Feedstock pumpability is one of the main obstacles for continuous processing of biomass through hydrothermal liquefaction, due to their tendency to form heterogeneous slurries. In this work a novel strategy is proposed to ensure lignocellulosic feed pumpability in HTL processing, even while applying elevated biomass loadings. In a first stage, a pumpable feed is prepared by an alkaline treatment of coarse wood chips at 180 °C, 120 minutes reaction time and 0.35 NaOH-to-wood ratio. In a subsequent stage the treated feedstock is converted into a bio-crude in a continuously operated 20 kg/h scale unit. In total 100 kg of wood paste with 25 % dry-matter is processed at 400 °C and 30 MPa, demonstrating the usefulness of this two-stage liquefaction strategy. As an additional advantage liquefaction of such pretreated wood shows increased biocrude yields with approximately 10% compared to the case where non-pretreated wood is liquefied.

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Section: Introductionmentioning

confidence: 99%

Two-stage alkaline hydrothermal liquefaction of wood to biocrude in a continuous bench-scale system

Sintamarean

Grigoras

Jensen³

et al. 2017

Biomass Conv. Bioref.

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show abstract

“…are used in the HTL process as char reduction agents and bio-crude yield enhancers (Karagoz et al, 2005;Yin et al, 2011), promoting retro-aldol reactions/cleavage and condensation reactions (Mazaheri et al, 2010) and preventing re-polymerization reactions (Li et al, 2015;Liu et al, 2014;Minowa et al, 1998). In Table 3, the solid yield for the results from alkaline pretreatment was higher if compared to the results from the acidic study as it contained the ash which was formed mainly of Na.…”

Section: Effect Of Slurry Ph and Thermal Treatment On The Htl Productmentioning

confidence: 99%

Effect of biomass pretreatment on the product distribution and composition resulting from the hydrothermal liquefaction of short rotation coppice willow

Grigoras

Stroe

Sintamarean

et al. 2017

Bioresource Technology

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A major challenge for the implementation of hydrothermal liquefaction (HTL) as a continuous process is the formulation of lignocellulosic feedstock, which is prone to phase separation into water and biomass parts when pressurized. One approach to remedy such phase separation is to reduce the dry matter content; however, as this approach is detrimental to process cost efficiency, designing an appropriate pretreatment step to ensure pumpability at high dry matter content is preferable. This paper evaluated the effect of various pretreatment methods on product distribution and composition resulting from the HTL of willow and proposes short rotation coppice as an alternative biomass feedstock for biofuels production. Alkaline-thermal pretreatment, besides making high dry matter pumpable feedstock slurries, also led to an increase in the production of the bio-crude product with an oxygen content lower than 8wt% and a higher concentration of aromatics and phenolic compounds.

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“…It is an effective technique to convert biomass into biofuels with less energy consumption compared to pyrolysis and gasification [78,79].…”

Section: Hydrothermal Liquefactionmentioning

confidence: 99%

Utilization of Multi-Tasking Non-Edible Plants for Phytoremediation and Bioenergy Source-A Review

Abdelsalam

Elshobary

Eladawy

et al. 2019

Phyton

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Heavy metal contamination of land and freshwater resources is a serious concern worldwide. It adversely affects the health of animals, plants and humans. Therefore, remediation of toxic heavy metals must be highly considered. Unlike other techniques, phytoremediation is a holistic technology and can be used in large scale for soil remediation as it is costless, novel, environmentally-safe and solar-driven technology. Utilization of non-edible plants in phytoremediation is an ingenious technique as they are used to generate new bioenergy resources along with the remediation of contaminated soils. Some nonfood bioenergy crops such as Salix species, Miscanthus species, Populus species, Eucalyptus species, and Ricinus communis exhibit high capability to accumulate various metals and to grow in contaminated lands. However, there are still sustainable challenges facing coupling phytoremediation with bioenergy production from polluted lands. Therefore, there has long been a need for developing different strategies to resolve such challenges. In this article review, we will discuss the phytoremediation mechanism, the technique of phytoremediation coupling with bioenergy production, sustainable problems facing linking phytoremediation with energy production as well as possible strategies to enhance the efficiency of bioenergy plants for soil decontamination by improving their characteristics such as metal uptake, transport, accumulation, and tolerance.

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Alkaline pretreatment and the synergic effect of water and tetralin enhances the liquefaction efficiency of bagasse

Cited by 29 publications

References 27 publications

Two-stage alkaline hydrothermal liquefaction of wood to biocrude in a continuous bench-scale system

Two-stage alkaline hydrothermal liquefaction of wood to biocrude in a continuous bench-scale system

Effect of biomass pretreatment on the product distribution and composition resulting from the hydrothermal liquefaction of short rotation coppice willow

Utilization of Multi-Tasking Non-Edible Plants for Phytoremediation and Bioenergy Source-A Review

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