Dry route process and wet route process for algal biodiesel production: A review of techno-economical aspects

Gautam, Aparna; Bhagat, Pundlik Rambhau; Kumar, Sushil; Patle, Dipesh S.

doi:10.1016/j.cherd.2021.08.018

Cited by 19 publications

(3 citation statements)

References 132 publications

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“…While non-catalytic methods yield high conversion rates, they necessitate high temperatures and pressures, which impact the economic feasibility of the process. [1][2][3] Among various processes for biodiesel production, catalytical supercritical processes are the promising methods for lipid extraction as well as biodiesel production from microalgae even for wet feedstock. These methods have unique advantages such as no need for catalysts, short reaction time, application of a wide range of raw materials and solvents, no need for pretreatment of raw materials and finally separation and treatment the products are relatively easy.…”

Section: Introductionmentioning

confidence: 99%

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Supercritical microalgae conversion to biofuel and value‐added components (oxygenates, hydrocarbons, and aromatics): A catalyst characterization study

Aghilinategh,

Barati,

Hamadanian

2023

Env Prog and Sustain Energy

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The study aimed to investigate the use of SrO/TiO2 nano‐catalysts in the one‐pot production of valuable products (such as fatty acid methyl esters, oxygenates, hydrocarbons, and aromatics) from Chlorella vulgaris microalgae through a supercritical process. The research focused on examining the impact of the factors, the SrO to TiO2 ratio, preparation method, and calcination temperature on the catalytic performance. Two calcination temperatures (600°C and 850°C), two Sr:Ti molar ratios (1 and 2), and two catalyst preparation methods (photochemical and impregnation) were considered. The catalysts were characterized using Scanning electron microscopy, transmission electron microscope, x‐ray crystallography, and Brunauer‐Emmett‐Teller techniques. The evaluation of catalyst performance primarily focused on the production of value‐added products, particularly fatty acid methyl esters (FAMEs). The results indicated that the catalyst prepared using the photochemical method with a Sr:Ti molar ratio of 2 and calcined at 850°C exhibited superior performance in terms of FAMEs and oxygenates production. It was demonstrated that the catalyst prepared using the photochemical method with higher Sr:Ti ratio had better performances in the production of biodiesel.

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Section: Introductionmentioning

confidence: 99%

“…Several processes, including pyrolysis, emulsification, transesterification, and supercritical conversion, have been used for converting oily biomasses to biodiesel. While non‐catalytic methods yield high conversion rates, they necessitate high temperatures and pressures, which impact the economic feasibility of the process 1–3 …”

Section: Introductionmentioning

confidence: 99%

Supercritical microalgae conversion to biofuel and value‐added components (oxygenates, hydrocarbons, and aromatics): A catalyst characterization study

Aghilinategh,

Barati,

Hamadanian

2023

Env Prog and Sustain Energy

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“…Taken together, algae are versatile resources that have the potential to be utilized in a variety of industries, which can not only help to combat climate change and pursue carbon neutralization, but also boost economic growth by creating new opportunities. Until now, a number of review articles have been published focusing on the algal applications for biofuels in the consideration of the high lipid content in some algal species and high biomass productivity, particularly under the rapid advancements in the metabolic engineering. − Thus, most literature focuses on algal biodiesel production with respect to reaction conditions, homogeneous/heterogeneous catalysts, new conversion processes like supercritical fluids, and associated techno-economic analysis (TEA) and life cycle assessment (LCA). However, apart from liquid biofuels like biodiesel, algae are also excellent feedstocks to produce gaseous and solid fuels and other types of liquid biofuels (e.g., bio-oil and bioethanol).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Algae-Derived Biofuels and Bioactive Compounds

Feng

Kang

Salaudeen

et al. 2022

Ind. Eng. Chem. Res.

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Owing to the declining reserve of fossil resources as well as more concerns on climate change, and essential energy security, and especially the broad consensus on carbon neutralization, it is significantly critical to develop renewable and sustainable energy and chemicals. Algae as alternative resources can be applied to produce biofuels and biochemicals. Among them, algae-derived natural pigments exhibit high market value due to their uses in pharmaceutical and food industries. As a result of the developments of engineering tools, it is feasible to scale up algal processing and applications. Prior to the industrial implementation, life cycle assessment is required to ensure the environmental feasibility of algae-based biofuels and biochemicals. In this article, recent advances in processing algae for liquid, gas, and solid fuels are reviewed. New approaches for enhancing the natural pigment accumulation are also discussed. Recent studies on life cycle assessment of algae-based biofuels and biochemicals, as well as the main challenges faced by the algal biorefinery, are discussed in this manuscript.

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