Hydrothermal liquefaction of Radiata Pine with Kraft black liquor for integrated biofuel production

Ong, Benjamin H.Y.; Walmsley, Timothy Gordon; Atkins, Martin John; Walmsley, Michael R.W.

doi:10.1016/j.jclepro.2018.07.218

Cited by 39 publications

(15 citation statements)

References 27 publications

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“…Ong et al [171] studied the feasibility of HTL where black liquor together with Radiata pine made up the feedstock for the process. The process included biomass preparation, the HTL process, hydrogen production, upgrading the bio-oil and wastewater processing, and it was also integrated with a pulp mill process.…”

Section: Review Of Techno-economic Analyses Of the Hydrothermal Liquementioning

confidence: 99%

Sub- and Supercritical Water Liquefaction of Kraft Lignin and Black Liquor Derived Lignin

et al. 2020

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To mitigate global warming, humankind has been forced to develop new efficient energy solutions based on renewable energy sources. Hydrothermal liquefaction (HTL) is a promising technology that can efficiently produce bio-oil from several biomass sources. The HTL process uses sub- or supercritical water for producing bio-oil, water-soluble organics, gaseous products and char. Black liquor mainly contains cooking chemicals (mainly alkali salts) lignin and the hemicellulose parts of the wood chips used for cellulose digestion. This review explores the effects of different process parameters, solvents and catalysts for the HTL of black liquor or black liquor-derived lignin. Using short residence times under near- or supercritical water conditions may improve both the quality and the quantity of the bio-oil yield. The quality and yield of bio-oil can be further improved by using solvents (e.g., phenol) and catalysts (e.g., alkali salts, zirconia). However, the solubility of alkali salts present in black liquor can lead to clogging problem in the HTL reactor and process tubes when approaching supercritical water conditions.

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Section: Review Of Techno-economic Analyses Of the Hydrothermal Liquementioning

confidence: 99%

Sub- and Supercritical Water Liquefaction of Kraft Lignin and Black Liquor Derived Lignin

et al. 2020

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“…LC bio-oils produced by pyrolysis and HTL are typically viscous dark liquids (Figure 1), composed to a large extent of oxygenated organic components. These oils are tight water-in-oil emulsions with water mass fractions typically in the range of 20 wt% to 30 wt% for pyrolysis oils [37], while lower values are observed for HTL biocrudes (4 wt%-15 wt%) [38][39][40][41][42]. Owing to the polarity induced by oxygen to many chemical constituents, raw bio-oils are not fully miscible with hydrocarbon solvents.…”

Section: Processmentioning

confidence: 99%

Supercritical Carbon Dioxide Extraction of Lignocellulosic Bio-Oils: The Potential of Fuel Upgrading and Chemical Recovery

Montesantos

Maschietti

2020

Energies

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Bio-oils derived from the thermochemical processing of lignocellulosic biomass are recognized as a promising platform for sustainable biofuels and chemicals. While significant advances have been achieved with regard to the production of bio-oils by hydrothermal liquefaction and pyrolysis, the need for improving their physicochemical properties (fuel upgrading) or for recovering valuable chemicals is currently shifting the research focus towards downstream separation and chemical upgrading. The separation of lignocellulosic bio-oils using supercritical carbon dioxide (sCO2) as a solvent is a promising environmentally benign process that can play a key role in the design of innovative processes for their valorization. In the last decade, fundamental research has provided knowledge on supercritical extraction of bio-oils. This review provides an update on the progress of the research in sCO2 separation of lignocellulosic bio-oils, together with a critical interpretation of the observed effects of the extraction conditions on the process yields and the quality of the obtained products. The review also covers high-pressure phase equilibria data reported in the literature for systems comprising sCO2 and key bio-oil components, which are fundamental for process design. The perspective of the supercritical process for the fractionation of lignocellulosic bio-oils is discussed and the knowledge gaps for future research are highlighted.

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“…The conversion of black liquor to biofuels unquestionably causes a decrease in emissions of greenhouse gases and pollutants ( Johansson, 2016 ; Naqvi et al., 2010 ; Teske et al., 2011 ). Consequently, the transformation of primary energy in the residual black liquor to a high value energy transporter (for instance, thermal energy in the form of steam, electrical energy and biofuels for transport applications) is of prodigious attention ( Al-Kaabi et al., 2017 ; Andersson et al., 2016 ; Carvalho et al., 2018 ; Ong et al., 2018 ). Black liquor can be transformed into a number of transport fuels such as DME, methanol, hydrogen, etc.…”

Section: Introductionmentioning

confidence: 99%

Energy optimization of Multiple Stage Evaporator system using Water Cycle Algorithm

Yadav

Verma

2020

Heliyon

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Black liquor, a residual stream from the Kraft recovery process of paper mills is an incipient biomass energy resource which finds prospective biofuel-based industrial applications to ensure process self-sufficiency and sustainability. Black liquor is concentrated using Multiple Stage Evaporator, the utmost energy intensive unit, before using it as biofuel. Pertaining to the contemporary global energy scenario, improvement in energy efficiency of Multiple Stage Evaporator becomes indispensable. The present work investigates the non-linear modeling and simulation-based optimization of Heptads' stage based Multiple Stage Evaporator in backward feed flow configuration integrated with various energy saving strategies. A novel metaheuristic approach, Water Cycle Algorithm has been employed to search the optimum estimates of unknown process variables and therefore, the optimum energy efficiency parameters. The optimization results demonstrate the efficiency of Water Cycle Algorithm in screening the most appropriate operating strategy, i.e. , hybrid model of all energy saving strategies (steam-split, feed-split and feed-preheating) with optimum energy efficiency i.e. Steam Economy of 7.092 and Steam Consumption of 1.919 kg/s. Moreover, a comparative analysis of the results with previous literature and real-time plant estimates reveal that the hybrid model offers improvement of 52.84% in Steam Economy and reduction in Steam Consumption by 28.13% when compared to the real plant data.

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Hydrothermal liquefaction of Radiata Pine with Kraft black liquor for integrated biofuel production

Cited by 39 publications

References 27 publications

Sub- and Supercritical Water Liquefaction of Kraft Lignin and Black Liquor Derived Lignin

Sub- and Supercritical Water Liquefaction of Kraft Lignin and Black Liquor Derived Lignin

Supercritical Carbon Dioxide Extraction of Lignocellulosic Bio-Oils: The Potential of Fuel Upgrading and Chemical Recovery

Energy optimization of Multiple Stage Evaporator system using Water Cycle Algorithm

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