Biodiesel Production:  Reaction and Process Parameters of Alkali-Catalyzed Transesterification of Waste Frying Oils

2007 ◽  
Vol 21 (5) ◽  
pp. 3023-3027 ◽  
Author(s):  
K. G. Georgogianni ◽  
M. G. Kontominas ◽  
E. Tegou ◽  
D. Avlonitis ◽  
V. Gergis
Keyword(s):  
Process Parameters ◽  
Biodiesel Production ◽  
Frying Oils ◽  
Waste Frying Oils

scholarly journals Pre-Treatment of Waste Frying Oils for Biodiesel Production

2015 ◽  
Vol 9 (7) ◽  
pp. 99 ◽  
Author(s):  
Nyoman Puspa Asri ◽  
Diah Agustina Puspita Sari
Keyword(s):  
Raw Materials ◽  
Batch Reactor ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
High Price ◽  
Composite Catalyst ◽  
Frying Oils ◽  
Animal Fats ◽  
Waste Frying Oils ◽  
Pre Treatment

Synthesis of biodiesel is a strategic step in overcoming energy scarcity and the environmental degradationcaused by the continuous use of the petroleum based energy. Biodiesel as an alternative fuel for diesel engine isproduced from renewable resources such as vegetable oils and animal fats. The main obstacle in the biodieselproduction is the high price of the raw materials, resulting in the price of biodiesel is not competitive comparedto the petroleum diesel. Therefore, the use of waste frying oils (WFO) is one way to reduce the cost of biodieselproduction, because of its availability and low price. In the present work, WFO from California Fried chicken(CFC) restaurants in Surabaya were used as feed stock for the biodiesel production. The experiments wereconducted using three steps of processes: pre-treatment of WFO, preparation of alumina based compositecatalyst CaO/KI/γ-Al2O3 and transesterification of treated WFO. WFO was treated by several types and variousamounts of activated adsobents. The treated WFO was transesterified in three neck glass batch reactor withrefluxed methanol using CaO/KI/γ-Al2O3. The results reveal that the best method for treating WFO is using 7.5%(wt. % to WFO) of coconut coir. Alumina based composite catalyst CaO/KI/γ-Al2O3 was very promising fortransesterification of WFO into biodiesel. The yield of biodiesel was 83% and obtained at 65ºC, 5 h of reactiontime, 1:18 of molar ratio WFO to methanol and 6% amount of catalyst.

scholarly journals Conversion of no/low value waste frying oils into biodiesel and polyhydroxyalkanoates

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Marco Vastano ◽  
Iolanda Corrado ◽  
Giovanni Sannia ◽  
Daniel K. Y. Solaiman ◽  
Cinzia Pezzella
Keyword(s):  
Escherichia Coli ◽  
Fatty Acids ◽  
Process Optimization ◽  
Biodiesel Production ◽  
Microbial Fermentation ◽  
Frying Oils ◽  
Medium Chain Length ◽  
Cell Factories ◽  
Waste Oils ◽  
Waste Frying Oils

Abstract A sustainable bioprocess was developed for the valorization of a no/low value substrate, i.e. waste frying oils (WFOs) with high content of free fatty acids (FFAs), otherwise unsuitable for biodiesel production. The bioprocess was verified using both recombinant (Escherichia coli) and native (Pseudomonas resinovorans) polyhydroxyalkanoates (PHAs) producing cell factories. Microbial fermentation of WFOs provided a 2-fold advantage: i) the reduction of FFAs content resulting into an upgrading of the “exhausted waste oils” and ii) the production of a bio-based microbial polymer. Proper strain designing and process optimization allowed to achieve up to 1.5 g L−1 of medium chain length, mcl-PHAs, together with an efficient conversion (80% yield) of the treated WFO into biodiesel.

Application of a Chitosan-Immobilized Talaromyces thermophilus Lipase to a Batch Biodiesel Production from Waste Frying Oils

2013 ◽  
Vol 171 (8) ◽  
pp. 1986-2002 ◽  
Author(s):  
Ines Belhaj-Ben Romdhane ◽  
Zamen Ben Romdhane ◽  
Maha Bouzid ◽  
Ali Gargouri ◽  
Hafedh Belghith
Keyword(s):  
Biodiesel Production ◽  
Frying Oils ◽  
Waste Frying Oils

Biodiesel production from waste frying oils in the presence of zeolite synthesized from steel furnace slag

2020 ◽  
pp. 1-14
Author(s):  
Mostafa Mahdavianpour ◽  
Mojtaba Pourakbar ◽  
Nadali Alavi ◽  
Najme Masihi ◽  
Fatemeh Mirzaei ◽  
...  
Keyword(s):  
Biodiesel Production ◽  
Frying Oils ◽  
Waste Frying Oils ◽  
Steel Furnace ◽  
Furnace Slag

scholarly journals Hierarchical Zeolites as Catalysts for Biodiesel Production from Waste Frying Oils to Overcome Mass Transfer Limitations

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4879
Author(s):  
Elyssa G. Fawaz ◽  
Darine A. Salam ◽  
Severinne S. Rigolet ◽  
T. Jean Daou
Keyword(s):  
Mass Transfer ◽  
Molecular Diffusion ◽  
Maximum Yield ◽  
Catalytic Performance ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Hierarchical Zeolites ◽  
Frying Oils ◽  
Waste Frying Oils

Hierarchical crystals with short diffusion path, conventional microcrystals and nanocrystals of ZSM-5 zeolites were used for biodiesel production from waste frying oils and were assessed for their catalytic activity in regard to their pore structure and acidic properties. Produced zeolites were characterized using XRD, nitrogen adsorption–desorption, SEM, TEM, X-ray fluorescence, and FTIR. Pore size effect on molecular diffusion limitation was assessed by Thiele modulus calculations and turnover frequencies (TOF) were used to discuss the correlation between acidic character and catalytic performance of the zeolites. Owing to the enhanced accessibility and mass transfer of triglycerides and free fatty acids to the elemental active zeolitic structure, the catalytic performance of nanosponge and nanosheet hierarchical zeolites was the highest. A maximum yield of 48.29% was reached for the transesterification of waste frying oils (WFOs) using HZSM-5 nanosheets at 12:1 methanol to WFOs molar ratio, 180 °C, 10 wt % catalyst loading, and 4 h reaction time. Although HZSM-5 nanosponges achieved high conversions, these more hydrophilic zeolites did not function according to their entire acidic strength in comparison to HZSM-5 nanosheets. NSh-HZSM5 catalytic performance was still high after 4 consecutive cycles as a result of the zeolite regeneration.

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