Biofuels from Renewable Sources, a Potential Option for Biodiesel Production

Neupane, Dhurba

doi:10.3390/bioengineering10010029

Cited by 82 publications

(32 citation statements)

References 182 publications

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“…Biodiesel, which can be produced from microbial lipids, has been proposed as a sustainable alternative to replace or supply fossil fuels in certain applications [ 46 , 47 ]. The predicted terephthalate bioconversion pathways of bacteria R. jostii RHA1 , which is a oleaginous microorganism, inspired us to explore the possibility of upcycling PET soluble fractions to lipids for biodiesel production [ 48 , 49 ].…”

Section: Resultsmentioning

confidence: 99%

A Multi-Streamline Approach for Upcycling PET into a Biodiesel and Asphalt Modifier

Chen,

Mraiza,

et al. 2024

Polymers

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The non-degradable nature of petroleum-based plastics and the dependence on petroleum-based products in daily life and production are dilemmas of human development today. We hereby developed a plastic waste upcycling process to address these challenges. A multi-stream fraction strategy was developed to process poly (ethylene terephthalate) (PET) plastics into soluble and insoluble fractions. The soluble fraction was used as a sole carbon source for microbial fermentation to produce biodiesel precursor lipids with an appreciable bioconversion yield. The insoluble fraction containing fractionated polymers was used as the asphalt binder modifiers. The downsized PET additive improved the high-temperature performance of the asphalt binder by 1 performance grade (PG) without decreasing the low-temperature PG. Subsequent SEM imaging unveiled alterations in the micromorphology induced by PET incorporation. Further FTIR and 1H NMR analysis highlighted the aromatic groups of PET polymers as a crucial factor influencing performance enhancement. The results demonstrated the multi-stream fraction as a promising approach for repurposing plastic waste to produce biodiesel and modify asphalt. This approach holds the potential to tackle challenges in fuel supply and enhance infrastructure resilience to global warming.

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Section: Resultsmentioning

confidence: 99%

A Multi-Streamline Approach for Upcycling PET into a Biodiesel and Asphalt Modifier

Chen,

Mraiza,

et al. 2024

Polymers

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“…Fuel microemulsions have been proposed and studied as an alternate approach to generate fuels with adequate qualities while avoiding waste disposal issues. It is a simple technology with minimal energy consumption, is easy to operate, and gives 100% product 14 – 16 . It also can be utilized in the diesel engine directly without the need for any modifications in the engine system 17 .…”

Section: Introductionmentioning

confidence: 99%

Stable diesel microemulsion using diammonium ionic liquids and their effects on fuel properties, particle size characteristics and combustion calculations

El Nagy,

Mohamed

2024

Sci Rep

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Ecofriendly and stable Fuel Microemulsions based on renewable components were prepared through solubilizing ethanol in diesel and waste cooking oil blend (4:1). New diquaternary ammonium ionic liquids (3a & 3b) were synthesized through a quaternization reaction of the synthesized dihaloester with diethyl ethanolamine tridecantrioate and triethyl amine tridecantrioate, respectively. The chemical structures were elucidated by NMR spectroscopy. It was observed from DLS analyses that the ethanol particles in all samples have sizes between 4.77 to 11.22 nm. The distribution becomes narrower with the decrease in the ionic liquid concentrations. The fuel properties fall within the ASTM D975 acceptable specifications and are close to the neat diesel properties. The Cetane index were 53 and 53.5, heating values were 38.5 and 38.5 MJ/kg, viscosities were 2.91 and 2.98 mm2/s, densities were 8.26 and 8.29 g/mL and flash points were 49 °C and 48 °C for 3a1 and 3b1 microemulsions, respectively. The particle sizes of samples were examined by DLS for 160 days and they were significantly stable. The amount of ethanol solubilized increases with the increase in the amount of the synthesized ionic liquids and cosurfactant. The combustion calculations pointed out that the microemulsions 3a1 and 3b1 need 13.07 kg air/kg fuel and 12.79 kg air/kg fuel, respectively, which are less than the air required to combust the pure diesel. According to theoretical combustion, using ionic liquids saves the air consumption required for combustion and reduces the quantities of combustion products. The prepared microemulsions were successfully used as a diesel substitute due to their improved combustion properties than pure diesel and low pollution levels.

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“…In compliance with this package of legislative proposals, the EU member states are obligated to reduce their net greenhouse gas emissions by at least 55% by the year 2030 relative to 1990. This is conducive to the search for alternative biofuels, which should be characterized by low emission of pollutants to the atmosphere and the highest possible energy efficiency [4,5].…”

Section: Introductionmentioning

confidence: 99%

Calorific Value of Zea mays Biomass Derived from Soil Contaminated with Chromium (VI) Disrupting the Soil’s Biochemical Properties

et al. 2023

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One of the major challenges faced by contemporary agriculture is how to achieve better yields of crops and, consequently, higher biomass, even in unfavorable environmental conditions. This challenge corresponds to the assumptions of sustainable development, wherein it is envisaged that plant biomass should be used on a large scale for heat generation or conversion of biofuels. Keeping pace with observed trends, the following study was conducted in order to determine the effect of Cr(VI) on the net calorific value of Zea mays, to assess the impact of this element on soil enzymatic activity, and to identify the effectiveness of compost and humic acids in alleviating possible negative effects of Cr(VI) toxicity. These aims were pursued by setting up a pot experiment, in which soil either uncontaminated or contaminated with increasing doses of Cr(VI) of 0, 15, 30, 45, and 60 mg Cr kg−1 d.m. was submitted to biostimulation with compost and the preparation HumiAgra, a source of humic acids, and cropped with Zea mays. The plant height, yield, and net calorific value of the aerial parts of maize, as well as its root yield, were determined. Additionally, the activity of seven soil enzymes and the values of the impact indices of compost and HumiAgra relative to the analyzed parameters were determined. It was found that Cr(VI) decreased the amount of energy obtained from the plants by decreasing maize biomass, and additionally by distorting the biochemical balance of the soil. Dehydrogenases, urease, and arylsulfatase proved to be particularly sensitive to this element. It was demonstrated that HumiAgra was more effective than compost in mollifying the adverse effects of Cr(VI) on the activity of soil enzymes and, consequently, on the biomass of Zea mays.

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Biofuels from Renewable Sources, a Potential Option for Biodiesel Production

Cited by 82 publications

References 182 publications

A Multi-Streamline Approach for Upcycling PET into a Biodiesel and Asphalt Modifier

A Multi-Streamline Approach for Upcycling PET into a Biodiesel and Asphalt Modifier

Stable diesel microemulsion using diammonium ionic liquids and their effects on fuel properties, particle size characteristics and combustion calculations

Calorific Value of Zea mays Biomass Derived from Soil Contaminated with Chromium (VI) Disrupting the Soil’s Biochemical Properties

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