scholarly journals Glycerolysis of Glycerol Carbonate from Crude Glycerol for Synthesis of Polyurethane

2015 ◽  
Vol 11 (10) ◽  
pp. 1144-1150 ◽  
Author(s):  
Hor Yan Phin ◽  
Soo King Lim ◽  
Chong Yu Low ◽  
Leong Huat Low ◽  
Chiu Yong Tan
Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1483
Author(s):  
Saifuddin Nomanbhay ◽  
Mei Yin Ong ◽  
Kit Wayne Chew ◽  
Pau-Loke Show ◽  
Man Kee Lam ◽  
...  

As a promising alternative renewable liquid fuel, biodiesel production has increased and eventually led to an increase in the production of its by-product, crude glycerol. The vast generation of glycerol has surpassed the market demand. Hence, the crude glycerol produced should be utilized effectively to increase the viability of biodiesel production. One of them is through crude glycerol upgrading, which is not economical. A good deal of attention has been dedicated to research for alternative material and chemicals derived from sustainable biomass resources. It will be more valuable if the crude glycerol is converted into glycerol derivatives, and so, increase the economic possibility of the biodiesel production. Studies showed that glycerol carbonate plays an important role, as a building block, in synthesizing the glycerol oligomers at milder conditions under microwave irradiation. This review presents a brief outline of the physio-chemical, thermodynamic, toxicological, production methods, reactivity, and application of organic carbonates derived from glycerol with a major focus on glycerol carbonate and dimethyl carbonate (DMC), as a green chemical, for application in the chemical and biotechnical field. Research gaps and further improvements have also been discussed.


2021 ◽  
Vol 945 (1) ◽  
pp. 012038
Author(s):  
Janice Sheow Tung Liew ◽  
Siew Yong Leong ◽  
Po Kim Lo

Abstract Valorisation of crude glycerol has gained much interest in the industry associated with the surplus of crude glycerol caused by the increase usage of biodiesel. Transesterification of crude glycerol using a heterogenous base catalyst is one of the effective ways to utilize the additional glycerol. Seawater clams commonly serve as a food source to us and the waste shells are a source of calcium carbonate that is abundantly available and can be converted into a heterogenous base catalyst for the transesterification process. Therefore, this study focuses on the utilization of catalyst synthesized from a species of seawater clam, Paratapes Undulatus in a transesterification reaction using crude glycerol (C.GLY) as a reactant together with dimethyl carbonate (DMC) to synthesize glycerol carbonate (GLYC). The catalysts are characterized using Field Emission Scanning Electron Microscope (FESEM), Attenuated Total Reflectance (ATR), Thermogravimetric Analysis (TGA), X-ray diffraction (XRD) and Particle Size Analyser (PSA). The product is characterized using Gas Chromatography (GC-FID). The performance of the synthesized shell catalyst with different calcination condition was studied. The reaction using the calcined shell catalyst is carried out at 75°C, molar ratio of 2 and 2wt% of catalyst for 1 hour. The catalyst that has the best performance is the shell catalyst that is calcined for 3h, which give the yield of 54.16%.


2014 ◽  
Vol 12 (12) ◽  
pp. 1262-1270 ◽  
Author(s):  
Madalina Tudorache ◽  
George Ghemes ◽  
Andreea Nae ◽  
Elena Matei ◽  
Ionel Mercioniu ◽  
...  

AbstractA comparative study of two different biocatalytic models, e.g. enzyme immobilized on magnetic particles (EIMP) and cross-linking enzyme aggregates onto magnetic particles (CLEMPA) was performed. The first model was designed as enzyme-immobilized on the magnetic particles surface (EIMP). The second model was constructed as a network structure with the enzyme aggregates and magnetic particles placed into the nodes and polyglutaraldehyde cross-linker as the network ledges. The design was called cross-linking enzyme aggregates onto magnetic particles (CLEMPA). The biocatalysts were prepared using lipase enzyme from Aspergillus niger for catalyzing the glycerol (Gly) conversion to glycerol carbonate (GlyC). The biocatalyst characteristics for both designs (EIMP and CLEMPA) were evaluated using scanning electron microscopy (SEM), laser light scattering (LLS) and UV-Vis techniques. The EIMP model was strongly influenced by the composition of the polymeric layer covering the particles surface, while the size of the magnetic particles affected mostly the CLEMPA design. Also, the biocatalytic capacity of the tested models was evaluated as maximum 52% Gly conversion with 90% GlyC selectivity for EIMP, and 73% Gly conversion with 77% GlyC selectivity for CLEMPA. Both biocatalytic models were successfully used to prepare GlyC from “crude” glycerol collected directly from the biodiesel process (e.g. 49% Gly conversion with 91% GlyC selectivity for EIMP and 70% Gly conversion with 80% GlyC selectivity for CLEMPA).


2016 ◽  
Vol 284 ◽  
pp. 469-477 ◽  
Author(s):  
Wai Keng Teng ◽  
Gek Cheng Ngoh ◽  
Rozita Yusoff ◽  
Mohamed Kheireddine Aroua

2021 ◽  
Vol 5 (1) ◽  
pp. 274-282
Author(s):  
Wai Keng Teng ◽  
Rozita Yusoff ◽  
Mohamed Kheireddine Aroua ◽  
Gek Cheng Ngoh

The production of glycerol carbonate (GC) from industrial grade crude glycerol was catalyzed by calcium oxide (CaO) via microwave assisted transesterification (MAT).


2018 ◽  
Vol 26 (9) ◽  
pp. 1912-1919 ◽  
Author(s):  
Ying Qing ◽  
Houfang Lu ◽  
Yingying Liu ◽  
Changjun Liu ◽  
Bin Liang ◽  
...  

2016 ◽  
Vol 8 (4) ◽  
pp. 1049-1059 ◽  
Author(s):  
Vidhyaa Paroo Indran ◽  
Anisah Sajidah Haji Saud ◽  
Gaanty Pragas Maniam ◽  
Yun Hin Taufiq-Yap ◽  
Mohd Hasbi Ab. Rahim

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