Production of renewable fuels by blending bio-oil with alcohols and upgrading under supercritical conditions

Omar, Sainab; Alsamaq, Suzanne; Yang, Yang; Wang, Jiawei

doi:10.1007/s11705-019-1861-9

Cited by 38 publications

(16 citation statements)

References 48 publications

(101 reference statements)

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“…The blending of bio-oil with supercritical methanol, ethanol, isopropanol, etc. increased the heating value of bio-oil from 17.51 to 28.85 MJ/kg [183]. Therefore, the blending of supercritical fluids or bio-diesel with biooil is also recommended by keeping the cost of the process into consideration.…”

Section: Discussionmentioning

confidence: 99%

An overview of recent development in bio-oil upgrading and separation techniques

Panwar

Paul

2020

Environmental Engineering Research

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Bio-oil produced from the fast pyrolysis/hydrothermal liquefaction is gaining popularity worldwide as the forerunner to replace fossil fuel. The bio-oil can be produced from agricultural waste, forest residue, and urban organic waste. It is also called pyrolysis oil, renewable fuel, and has the potential to be used as fuel in many applications. The application of bio-oil as transportation fuel helps to reduce the emission of greenhouse gases and to keep up the ecological balance. The bio-oil has the heating value of nearly half of the diesel fuel i.e. 16-19 MJ/kg; but, the inferior properties such as high water content, high viscosity, low pH, and poor stability hinder bio-oil application as a fuel. Thus, this paper provides a detailed review of bio-oil properties, its limitations and focuses on the recent development of different upgrading and separation techniques, used to date for the improvement of the bio-oil quality. Furthermore, the advantages and disadvantages of each upgrading method along with the application and environmental impact of bio-oil are also discussed in this article.

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Section: Discussionmentioning

confidence: 99%

An overview of recent development in bio-oil upgrading and separation techniques

Panwar

Paul

2020

Environmental Engineering Research

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“…The benchmark for this work is the reported solvent-oil blend consisting of 50 wt.% pyrolysis bio-oil and 50 wt.% of iso-propanol, with a HHV of 27.55 MJ/kg [44]. The cost of iso-propanol and bio-oil was assumed to be USD 1336.57 per tonne of iso-propanol and USD 354 per tonne of pyrolysis bio-oil [45,46]. The cost of the competitor's solvent-oil blend can be calculated using Equation (13), where x i and C i are the ratio and costs of the solvent and bio-oil, respectively.…”

Section: Database Verificationmentioning

confidence: 99%

Computer-Aided Framework for the Design of Optimal Bio-Oil/Solvent Blend with Economic Considerations

Chong

Aboagwa

et al. 2021

Processes

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A major obstacle in utilising pyrolysis bio-oil as biofuel is its relatively low heating value, high viscosity, and non-homogeneity. Solvent addition is a simple yet practical approach in upgrading pyrolysis bio-oil. However, most solvents are often manufactured as specialty chemicals, and thus, this leads to a high production cost of solvents. It is crucial for the designed solvent-oil blend to achieve both fuel functionality and economic targets to be competitive with the conventional diesel fuel. Hence, the objective of this work is to generate feasible solvent candidates by solving this multi-objective optimisation (MOO) problem via a computer-aided molecular design (CAMD) approach. Initially, an optimisation model was developed to identify potential solvents that satisfied the predefined targeted properties. Next, a MOO model was developed via a fuzzy optimisation approach to identify the trade-off between profitability and heating value of the solvent-oil blend. A pricing model was employed to estimate the profitability of the solvent-oil blend. The production of bio-oil in a pyrolysis plant was used to illustrate the applicability of the pricing model. Lastly, phase stability analysis was conducted to ensure the stability and miscibility of the solvent-oil blend. With the developed framework, a promising and cost-effective solvent-oil blend can be generated while displaying optimal biofuel properties.

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“…The research by Omar et al included a non-catalytic upgrading of fast pyrolysis bio-oil using supercritical methanol, ethanol and isopropanol conditions, respectively [41]. The results showed supercritical methanol treatment of the crude bio-oil resulted in the complete removal of acids and a significant increase in esters.…”

Section: Non-catalytic Bio-oil Upgrading In Supercritical Methanolmentioning

confidence: 99%

A review on catalytic & non-catalytic bio-oil upgrading in supercritical fluids

Omar

Yang

Wang

2020

Front. Chem. Sci. Eng.

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This review article summarizes the key published research on the topic of bio-oil upgrading using catalytic and non-catalytic supercritical fluid (SCF) conditions. The precious metal catalysts Pd, Ru and Pt on various supports are frequently chosen for catalytic bio-oil upgrading in SCFs. This is reportedly due to their favourable catalytic activity during the process including hydrotreating, hydrocracking, and esterification, which leads to improvements in liquid yield, heating value, and pH of the upgraded bio-oil. Due to the costs associated with precious metal catalysts, some researchers have opted for non-precious metal catalysts such as acidic HZSM-5 which can promote esterification in supercritical ethanol. On the other hand, SCFs have been effectively used to upgrade crude bio-oil without a catalyst. Supercritical methanol, ethanol, and water are most commonly used and demonstrate catalyst like activities such as facilitating esterification reactions and reducing solid yield by alcoholysis and hydrolysis, respectively.

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Production of renewable fuels by blending bio-oil with alcohols and upgrading under supercritical conditions

Cited by 38 publications

References 48 publications

An overview of recent development in bio-oil upgrading and separation techniques

An overview of recent development in bio-oil upgrading and separation techniques

Computer-Aided Framework for the Design of Optimal Bio-Oil/Solvent Blend with Economic Considerations

A review on catalytic & non-catalytic bio-oil upgrading in supercritical fluids

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