SO3H and NH2+ functional carbon-based solid acid catalyzed transesterification and biodiesel production

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 72146-72149 ◽  
Author(s):  
Liangzhen Cai ◽  
Decai Meng ◽  
Shaoqi Zhan ◽  
Xiaoxia Yang ◽  
Taoping Liu ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Solid Acid ◽  
Methyl Esters ◽  
Biodiesel Production ◽  
Mild Conditions ◽  
Highly Active ◽  
Acid Catalyzed ◽  
Carbon Based

A SO3H and NH2+ functional carbon-based solid acid was used as a highly active heterogeneous catalyst for the transesterification of various carboxylic methyl esters with alcohols under mild conditions.

scholarly journals Utilisation of Non-Edible Source (Pongamia pinnata Seeds Shells) for Producing Methyl Esters as Cleaner Fuel in the Presence of a Novel Heterogeneous Catalyst Synthesized from Waste Eggshells

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5772
Author(s):  
Ala’a H. Al-Muhtaseb
Keyword(s):  
Heterogeneous Catalyst ◽  
Photoelectron Spectroscopy ◽  
Methyl Esters ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Process Time ◽  
X Ray ◽  
Highly Active ◽  
Temperature Programmed

Waste eggshells were considered for synthesising a precursor (CaO) for a heterogeneous catalyst, further impregnated by alkali caesium oxide (Cs2O). The following techniques were used to characterise the synthesised catalysts: X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and Temperature Programmed Desorption (CO2-TPD). The synthesised catalyst revealed its suitability for transesterification to produce biodiesel. The biodiesel production process was optimised, and it showed that the optimal biodiesel yield is 93.59%. The optimal set of process parameters is process temperature 80 °C, process time 90 min, methanol-to-oil molar ratio 8 and catalyst loading 3 wt.%. It has been found that the high basicity of the catalyst tends to give a high biodiesel yield at low methanol-to-oil ratio 8 when the reaction time is also less (90 min). The fuel properties of biodiesel also satisfied the standard limits defined by ASTM and the EN standards. Thus, the synthesised catalyst from waste eggshells is highly active, improved the biodiesel production conditions and PPSS oil is a potential nonedible source.

Solid acid catalyzed biodiesel production by simultaneous esterification and transesterification

2006 ◽  
Vol 8 (12) ◽  
pp. 1056 ◽  
Author(s):  
Mangesh G. Kulkarni ◽  
Rajesh Gopinath ◽  
Lekha Charan Meher ◽  
Ajay Kumar Dalai
Keyword(s):  
Solid Acid ◽  
Biodiesel Production ◽  
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>

Carbon-based solid acid catalyzed highly efficient oxidations of organic compounds with hydrogen peroxide

2008 ◽  
Vol 9 (5) ◽  
pp. 859-863 ◽  
Author(s):  
Arash Shokrolahi ◽  
Abbas Zali ◽  
Hamid Reza Pouretedal ◽  
Mohammad Mahdavi
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Solid Acid ◽  
Highly Efficient ◽  
Acid Catalyzed ◽  
Carbon Based

scholarly journals Niobium phosphotungstates: excellent solid acid catalysts for the dehydration of fructose to 5-hydroxymethylfurfural under mild conditions

RSC Advances ◽  
2018 ◽  
Vol 8 (57) ◽  
pp. 32423-32433 ◽  
Author(s):  
Guo Qiu ◽  
Xincheng Wang ◽  
Chongpin Huang ◽  
Yingxia Li ◽  
Biaohua Chen
Keyword(s):  
Heterogeneous Catalyst ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Mild Conditions

A 5-HMF yield of 96.7% was obtained over an excellent heterogeneous catalyst NbPW-06 in DMSO at 80 °C.

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