Recent insights into continuous-flow biodiesel production via catalytic and non-catalytic transesterification processes

Tran, Dang Thuan; Chang, Jo Shu; Lee, Dong Hoon

doi:10.1016/j.apenergy.2016.11.006

Cited by 121 publications

(59 citation statements)

References 155 publications

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“…[1][2][3] Microalgae is unique because of its relatively high photosynthetic efficiency, faster growth rate, and area-specic yield when compared with terrestrial plants. 4,5 Thermochemical procedures are feasible for both dry (pyrolysis) and wet biomass conversion (hydrothermal liquefaction, HTL), and the latter can be carried out under mild conditions because there is no lignocellulose in the microalgae cell. 6 Microalgae HTL is considered an energy-efficient, environmentally friendly process, especially when (sub-) critical water is employed as a solvent and a reactant.…”

Section: Introductionmentioning

confidence: 99%

Fatty acid decarboxylation reaction kinetics and pathway of co-conversion with amino acid on supported iron oxide catalysts

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Fatty acid decarboxylation reaction kinetics and pathway of co-conversion with amino acid on supported iron oxide catalysts

et al. 2017

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“…The resulted optimized parameters using the Statistica 12 software were as follows: residence time (90 min), catalyst loading (8 wt%), methanol/oil ratio (18), and reaction temperature (368.15 K). The predicted biodiesel yield was 96.14% compared to the experimental value of 96.51% with a percentage error of 0.5% as per the validation done using the Statistica 12 software.…”

Section: Parameters Optimizationmentioning

confidence: 99%

“…Moreover, they allow continuous separation of biodiesel to be achieved [17]. In a recent review on the production of biodiesel in continuous mode, the researchers showed the advantages and disadvantages of the different types of continuous flow processes [18]. Statistical experimental design of response surface methodologies has been used in the optimization of the process parameters for biodiesel production in batch and continuous processes [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

DBSA-Catalyzed Sewage Sludge Conversion into Biodiesel in a CSTR: RSM Optimization and RTD Study

Jazie

2019

J. Eng. Technol. Sci.

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Sewage sludge from the primary stage of a wastewater treatment plant (WWTP) in Al-Diwaniyah City was direct-transesterified to biodiesel using dodecylbenzenesulfonic acid catalyst in a system with two continuously stirred tank reactors. The response surface and the central cube design methodologies were used to optimize the parameters affecting the biodiesel yield. The optimum conditions for the process in this study were found to be (residence time: 90 min; catalyst loading 8 wt%; methanol/oil ratio: 18; reaction temperature: 368.15 K). Under the optimum process conditions a biodiesel yield of 96.51% was obtained. The experimental residence time distribution (RTD) was calculated and compartment models were applied for the two-tank reactor system. In the CSTR, a dead zone of (10 liter) was estimated. The independent analysis of fatty acids in the sewage showed that the lipids consisted primarily of palmitic acid (C16:0 = 37.86), oleic acid (C18:1 cis-9 = 19.72) and stearic acid (C18:0 = 17.32), and the acid value was (2.44 mg KOH/g). The properties of the biodiesel produced were comparable with the ASTM D-6751-2 standard and the properties of mineral diesel.

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“…Under these conditions, some physico‐chemical properties of the fluid change, for instance, there are reductions in the dielectric constant, viscosity, and polarity. [ 3,4 ] This contributes to the efficiency of the reaction and therefore the miscibility of the components, resulting in higher ester contents and a shorter the reaction time. [ 5–8 ]…”

Section: Introductionmentioning

confidence: 99%

Continuous Transesterification Reaction of Residual Frying Oil with Pressurized Ethanol Using KF/Clay as Catalyst

Zempulski

Trentini

Milinsk

et al. 2020

Euro J Lipid Sci & Tech

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The efficiency of a heterogeneous potassium fluoride (KF)/clay catalyst in continuous ester production from residual frying oil using pressurized ethanol is evaluated. Reactions without catalysts are conducted to determine the effect of the catalyst on ester yield. To verify the performance of the catalyst, the reactions are conducted for 3 h with determination of the ester yield every 30 min and characterization of the catalyst after each reaction. The influence of the temperature, catalyst mass used in the catalytic bed, and the residence time are evaluated. KF/clay is found to be efficient in ester synthesis and provides better results compared with non-catalytic reactions and the formation of esters is favored on increasing the temperature. The ester yields remain stable over time at 275 and 300°C but at 225 and 250°C the yields decrease by 48.42% and 38.40%, respectively. This may be due to the lower diffusion coefficient at these temperatures, implying that the reaction occurs preferentially at the catalyst surface. There is an increase in yield with an increase in the catalyst mass up to 2 g. The catalyst maintains its morphological characteristics after the reaction and the average mass loss in each reaction is <8%. Practical Applications: Transesterification at high temperature under pressurized conditions has great potential in biodiesel production, due to the efficiency in obtaining esters in short reaction times. In addition, the use of inexpensive and easily obtained clay-based catalysts contributes to higher yields and allows milder operating conditions. These factors make it possible to obtain biodiesel using a low-cost raw material (residual frying oil), under pressurized conditions, which will be of interest worldwide due to the various benefits linked to its use.

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Recent insights into continuous-flow biodiesel production via catalytic and non-catalytic transesterification processes

Cited by 121 publications

References 155 publications

Fatty acid decarboxylation reaction kinetics and pathway of co-conversion with amino acid on supported iron oxide catalysts

Fatty acid decarboxylation reaction kinetics and pathway of co-conversion with amino acid on supported iron oxide catalysts

DBSA-Catalyzed Sewage Sludge Conversion into Biodiesel in a CSTR: RSM Optimization and RTD Study

Continuous Transesterification Reaction of Residual Frying Oil with Pressurized Ethanol Using KF/Clay as Catalyst

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