In-Situ Dodecylbenzenesulfonic acid -Catalyzed Transesterification of Micro Algae Chlorella Sp. for Biodiesel Production

2019 ◽  
Author(s):  
Ali A. Jazie ◽  
Emad Jadeen Alshebaney ◽  
Suhad A. Abed
Keyword(s):  
Biodiesel Production ◽  
Dodecylbenzenesulfonic Acid ◽  
Chlorella Sp ◽  
Acid Catalyzed

scholarly journals Optimizing Nannochloropsis Growing Conditions for Biodiesel Production Through Analysis of Lipid Content

2021 ◽  
Author(s):  
Steven Liu ◽  
Devon Renock
Keyword(s):  
Aluminum Sulfate ◽  
Methyl Esters ◽  
Internal Standard ◽  
Dry Weight ◽  
Biodiesel Production ◽  
Vacuum Filtration ◽  
Flame Ionization ◽  
Acid Catalyzed ◽  
Growing Conditions

<div><div><div><div><p>The algae are grown in two groups of three 2.5 L glass jugs spanning three concentration levels of nitrates and phosphates. A growing “f/2” medium is kept constant across trials. The algae are harvested using a flocculating solution of aluminum sulfate and vacuum filtration. The oven dry weight is obtained. Acid catalyzed in situ transesterification is used to achieve maximum conversion of fatty acids into fatty acid methyl esters (FAME), which are then analyzed using gas chromatography (GC) equipped with a flame ionization detector. Supelco 37-component FAME standards were used for identification and quantification of the FAMEs. Methyl pentadecanoate was used as an internal standard for quantification. HPLC-grade hexane used as solvent in GC analysis.</p></div></div></div></div>

scholarly journals Biodiesel Production through Catalytic Microwave In-situ Transesterification of Micro-algae (Chlorella sp.)

2020 ◽  
Vol 9 (1) ◽  
pp. 113-117
Author(s):  
Mahfud Mahfud ◽  
Ummu Kalsum ◽  
Viqhi Ashwie
Keyword(s):  
Reaction Time ◽  
Microwave Power ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
In Situ Transesterification ◽  
Chlorella Sp ◽  
Low Concentrations ◽  
Face Centered ◽  
Hexane Solution

Aim of this research are to study and develop research related to the potential of Chlorella sp. into biodiesel with the help of microwaves in-situ transesterification by characterizing parameters such as microwave power (300; 450; 600 W) and reaction time (10; 30; 50 minutes) with catalyst concentration of KOH and molar ratio of microalga : methanol are 2% and 1:12 respectively and optimized by response surface methodology with Face Centered Central Composite Design (FCCCD). The study was carried out by dissolving the catalyst into methanol according to the variable which was then put into a reactor containing microalgae powder in the microwave and turned on according to the predetermined variable. After the reaction process is complete, the mixture is filtered and resuspended with methanol for 10 minutes to remove the remaining FAME and then the obtained filtrate is cooled. Water is added to the filtrate solution to facilitate the separation of hydrophilic components before being separated and pushed apart until 3 layers are formed. Amount of FAMEs in the first layer formed were extracted with n-hexane solution and washed with water and the FAME product obtained was then distilled to remove the remaining n hexane and then weighed. The results indicated that yield increased with increasing reaction time and microwave power with the best conditions of 50 minutes each and 440.53 watts with the highest yield reaching 35.72% (dry basis) through using of KOH catalysts with low concentrations, 2%.©2020. CBIORE-IJRED. All rights reserved

scholarly journals Biodiesel production from a microalgal Chlorella sp. through the technology of in situ trasesterification

2012 ◽  
Vol 33 (4) ◽  
Author(s):  
Dinh Thi Ngoc Mai ◽  
Le Thi Thom ◽  
Bui Dinh Lam ◽  
Dang Diem Hong ◽  
Doan Lan Phuong
Keyword(s):  
Biodiesel Production ◽  
Chlorella Sp

scholarly journals Optimizing Nannochloropsis Growing Conditions for Biodiesel Production Through Analysis of Lipid Content

2021 ◽  
Author(s):  
Steven Liu ◽  
Devon Renock
Keyword(s):  
Aluminum Sulfate ◽  
Methyl Esters ◽  
Internal Standard ◽  
Dry Weight ◽  
Biodiesel Production ◽  
Vacuum Filtration ◽  
Flame Ionization ◽  
Acid Catalyzed ◽  
Growing Conditions

<div><div><div><div><p>The algae are grown in two groups of three 2.5 L glass jugs spanning three concentration levels of nitrates and phosphates. A growing “f/2” medium is kept constant across trials. The algae are harvested using a flocculating solution of aluminum sulfate and vacuum filtration. The oven dry weight is obtained. Acid catalyzed in situ transesterification is used to achieve maximum conversion of fatty acids into fatty acid methyl esters (FAME), which are then analyzed using gas chromatography (GC) equipped with a flame ionization detector. Supelco 37-component FAME standards were used for identification and quantification of the FAMEs. Methyl pentadecanoate was used as an internal standard for quantification. HPLC-grade hexane used as solvent in GC analysis.</p></div></div></div></div>

Catalytic Carbonyl-Olefin Metathesis of Aliphatic Ketones: Iron(III) HomoDimers as Lewis Acidic Superelectrophiles

2018 ◽  
Author(s):  
Haley Albright ◽  
Paul S. Riehl ◽  
Christopher C. McAtee ◽  
Jolene P. Reid ◽  
Jacob R. Ludwig ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Olefin Metathesis ◽  
Acid Activation ◽  
Lewis Acid Catalysts ◽  
Distinct Mode ◽  
Aliphatic Ketones ◽  
Carbon Carbon Bond ◽  
Metathesis Reactions ◽  
Acid Catalyzed

<div>Catalytic carbonyl-olefin metathesis reactions have recently been developed as a powerful tool for carbon-carbon bond</div><div>formation. However, currently available synthetic protocols rely exclusively on aryl ketone substrates while the corresponding aliphatic analogs remain elusive. We herein report the development of Lewis acid-catalyzed carbonyl-olefin ring-closing metathesis reactions for aliphatic ketones. Mechanistic investigations are consistent with a distinct mode of activation relying on the in situ formation of a homobimetallic singly-bridged iron(III)-dimer as the active catalytic species. These “superelectrophiles” function as more powerful Lewis acid catalysts that form upon association of individual iron(III)-monomers. While this mode of Lewis acid activation has previously been postulated to exist, it has not yet been applied in a catalytic setting. The insights presented are expected to enable further advancement in Lewis acid catalysis by building upon the activation principle of “superelectrophiles” and broaden the current scope of catalytic carbonyl-olefin metathesis reactions.</div>

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