Synthesis of fatty acid methyl esters via non-catalytic transesterification of avocado oil with dimethyl carbonate

Jung, Jong‐Min; Oh, Jeong-Ik; Kwon, Dohee; Park, Young-Kwon; Zhang, Ming; Lee, Jechan; Kwon, Eilhann E.

doi:10.1016/j.enconman.2019.04.095

Cited by 26 publications

(16 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The GC temperature program was as follows: (1) 50 to 180 °C at a heating ramp rate of 10 °C min –1 and (2) 180 to 230 °C min –1 at a heating rate of 5 °C min –1 . Detailed analytical procedures are described in our previous study . The visualization of cockspur grass seeds after conversion to biodiesel was done by scanning electron microscopy (SEM) (Hitachi S-4700, Japan).…”

Section: Methodsmentioning

confidence: 99%

Valorization of Phytoremediation Byproduct via Synthesis of Biodiesel from Cockspur Grass (Echinochloa crus-galli) Seed

Jung

Kim

Moon

et al. 2020

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

Phytoremediation is an ecofriendly remediation practice for contaminated soils. This study evaluated the efficiency of cockspur grass (Echinochloa crus-galli) as a phytoremediation plant species by measuring the heavy metal(loid) uptake. In addition, for determining a viable route to valorize the phytoremediation byproduct, biodiesel was produced by the conversion of contaminated cockspur grass seeds through noncatalytic transesterification with a porous medium. From a series of experimental studies, this study confirmed that a substantial amount of heavy metal(loid)s was translocated into cockspur grass, and their removal efficiency after 3 weeks was as follows: Ni ≥ Cu > Co > Zn > Mn > Fe > As. Prior to the transesterification study, lipid content (11.6 wt %), a feedstock for biodiesel production, in cockspur grass seeds was estimated by the thermogravimetric analysis and the Soxhlet extraction test. Because the lipid extract from cockspur grass seeds contained a substantial amount of organic and inorganic impurities, biodiesel synthesis from a conventional transesterification method was negligible. However, biodiesel yield from noncatalytic transesterification using a porous medium reached 98% at 390 °C. The yield of biodiesel decreased at ≥400 °C due to biodiesel thermal cracking. This study also revealed that the noncatalytic transesterification of cockspur grass seeds into biodiesel was affected by the steric factors (collision frequency), evidenced by the carbon chain length of the acyl acceptor that was inversely proportional to the biodiesel yield.

show abstract

Section: Methodsmentioning

confidence: 99%

Valorization of Phytoremediation Byproduct via Synthesis of Biodiesel from Cockspur Grass (Echinochloa crus-galli) Seed

Jung

Kim

Moon

et al. 2020

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Catalytic transesterification processes have some limitations. These processes are time-consuming and need a separation process for the mixture of oil, catalyst, alcohol, and saponified impurities in the biodiesel [61]. The supercritical transesterification process requires no catalyst during the conversion process and involves no saponification.…”

Section: Chemical Conversion Of Biomass Materialsmentioning

confidence: 99%

Crude Glycerol as a Potential Feedstock for Future Energy via Thermochemical Conversion Processes: A Review

2021

View full text Add to dashboard Cite

Biodiesel is an emerging substitute for petroleum-based products. It is considered an ecologically safe and sustainable fuel. The high cost of biodiesel production is linearly related to its feedstock. Crude glycerol, which is a by-product of the biodiesel industry, is also a major challenge that must be addressed. A large volume of crude glycerol needs to be disposed of, and this involves processing, dumping, and land requirements. This increases the cost of biodiesel production. One way to decrease the cost of biodiesel production is to utilize its by-product to make valuable products. Crude glycerol can be processed to produce a variety of chemicals and products. The present utilization of crude glycerol is not enough to bring down its surplus availability. Thermochemical conversion processes can utilize crude glycerol as a starting feedstock and convert it into solid, liquid, and gaseous fuels. The utilization of crude glycerol through integrated thermochemical conversion processes could lead to an integrated biorefinery. This review paper highlights the research scope for areas where crude glycerol could be utilized as a feedstock or co-feedstock in thermochemical conversion technology. Various thermochemical conversion processes, namely, gasification, pyrolysis, combustion, catalytic steam reforming, liquefaction, and supercritical water reforming, are discussed and shown to be highly suitable for the use of crude glycerol as an economical feedstock. It is found that the integration of crude glycerol with other thermochemical conversion processes for energy production is a promising option to overcome the challenges related to biodiesel production costs. Hence, this paper provides all the necessary information on the present utilization status of crude glycerol in thermochemical conversion processes, as well as identifying possible research gaps that could be filled by future research studies.

show abstract

“…Their results show the technical viability (Table 4) and environmental friendliness potential of avocado oil for diesel engines, and thus underused avocados can be collected for this use. In this way, using rotten avocados, Jung et al [66] applied catalyzed (with KOH) and non-catalyzed (with silica) methanolysis and dichloromethane for transesterification to obtain biodiesel. The latter experiment with dichloromethane provided a yield of 93%, avoiding the use methanol as an acyl acceptor, but it requires the use of high temperatures (up to 380 • C).…”

Section: Biodieselmentioning

confidence: 99%

Avocado-Derived Biomass as a Source of Bioenergy and Bioproducts

2020

View full text Add to dashboard Cite

The avocado (Persea americana Mill.) is a tree native to Mexico and Guatemala. Avocado consumption, fresh or in the form of processed products, is growing everywhere and it has caused a large number of countries to invest heavily in avocado production. The industrialization of avocado gives as a result a huge amount of waste, not only the peel and stone but also that waste generated by the pruning practices and oil extraction. These biomasses could be converted into raw materials to obtain different types of co-products, but this implies changes in the use of these resources, the design of efficient production systems, and integration to take full advantage of them, e.g., by developing biorefinery models. Therefore, this review firstly gives a snapshot of those residues generated in the avocado industry and provides their chemical composition. Secondly, this review presents updated information about the valorization ways of avocado-derived biomass to obtain bioenergy, biofuels, and other marketable products (starch, protein, phenolic compounds, and biosorbents, among others) using a single process or integrated processes within a biorefinery context. Green technologies to obtain these products are also covered, e.g., based on the application of microwaves, ultrasound, supercritical fluids, etc. As a conclusion, there is a variety of ways to valorize avocado waste in single processes, but it would be promising to develop biorefinery schemes. This would enable the avocado sector to move towards the zero-waste principle.

show abstract

Synthesis of fatty acid methyl esters via non-catalytic transesterification of avocado oil with dimethyl carbonate

Cited by 26 publications

References 33 publications

Valorization of Phytoremediation Byproduct via Synthesis of Biodiesel from Cockspur Grass (Echinochloa crus-galli) Seed

Valorization of Phytoremediation Byproduct via Synthesis of Biodiesel from Cockspur Grass (Echinochloa crus-galli) Seed

Crude Glycerol as a Potential Feedstock for Future Energy via Thermochemical Conversion Processes: A Review

Avocado-Derived Biomass as a Source of Bioenergy and Bioproducts

Contact Info

Product

Resources

About