Thermal Degradation Kinetic Study of Rubber Seed Oil and Its Methyl Esters under Inert Atmosphere

2017 ◽  
Vol 31 (9) ◽  
pp. 9642-9651 ◽  
Author(s):  
Ali Shemsedin Reshad ◽  
Pankaj Tiwari ◽  
Vaibhav V. Goud
Keyword(s):  
Thermal Degradation ◽  
Kinetic Study ◽  
Seed Oil ◽  
Methyl Esters ◽  
Inert Atmosphere ◽  
Rubber Seed Oil ◽  
Degradation Kinetic ◽  
Rubber Seed ◽  
Thermal Degradation Kinetic

Studies in the Utilization of Biobased Additives as Thermal Stabilizer for Plasticized PVC

2009 ◽  
Vol 62-64 ◽  
pp. 335-344
Author(s):  
F.E. Okieimen ◽  
T.O. Egbuchunam ◽  
D.B. Balköse
Keyword(s):  
Thermal Degradation ◽  
Seed Oil ◽  
Initial Rate ◽  
Divalent Metal ◽  
Rubber Seed Oil ◽  
Yellowness Index ◽  
Rubber Seed ◽  
Thermal Stabilizer ◽  
Plasticized Pvc ◽  
Metal Soaps

Divalent metal (barium, cadmium, calcium and zinc) soaps of rubber seed oil and their binary mixtures (Ba/Cd and Ca/Zn) and epoxidized rubber seed oil (4.5% epoxide content) and its admixtures with the single divalent metal soaps were evaluated as thermal stabilizer for dioctylphthalate plasticized PVC using changes in discolouration indices (yellowness index and UV absorption at 360nm) and initial rates of dehydrochlorination measured at 140 and 160oC. The results obtained showed that the divalent metal soaps were relatively effective in stabilizing the dioctylphthalate plasticized PVC against thermal degradation and that the binary soap mixtures enhanced the heat stabilizing effectiveness: marked reduction in the values of the discolouration indices; longer dehydrochlorination induction period and smaller values of rate constant of initial rate of dehydrochlorination. It was found that epoxidized rubber seed oil was less effective in comparison with the divalent metal soaps in stabilizing plasticized PVC against thermal degradation. These results show that the bio-based additives are compatible with dioctylphthalate plasticized PVC, stable to heat within the range of temperature used in the processing of plasticized PVC, inhibit/retard dehydrochlorination and reduce the extent of degradation.

scholarly journals Biodiesel Production from Rubber Seed Oil by Transesterification Using a Co-solvent of Fatty Acid Methyl Esters

2018 ◽  
Vol 41 (5) ◽  
pp. 1013-1018 ◽  
Author(s):  
Hanh Ngoc Thi Le ◽  
Kiyoshi Imamura ◽  
Norie Watanabe ◽  
Masakazu Furuta ◽  
Norimichi Takenaka ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Methyl Esters ◽  
Seed Oil ◽  
Methyl Esters ◽  
Biodiesel Production ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Acid Methyl

Thermophysical Properties of Pongama Honge Oil Methyl Ester and Rubber Seed Oil Methyl Ester for Wide Temperature Range

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Shaik Moulali ◽  
Y.V. Hanumantha Rao ◽  
Vinay Atgur ◽  
G. Manvendra ◽  
G.P. Desai
Keyword(s):  
Thermal Conductivity ◽  
Methyl Ester ◽  
Thermal Degradation ◽  
Specific Heat ◽  
Seed Oil ◽  
Edible Oils ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Temperature Range ◽  
Honge Oil Methyl Ester

Thermal energy is used in the process of heating, cooling and product design purpose. In this work, two non-edible oils are considered and their thermal conductivity, specific heat and thermal degradation are experimentally determined as a function of temperature using, guarded hot plate method, differential scanning calorimetry (DSC) and thermogravtic analyser (TGA). Miniature difference between the obtained and actual thermal conductivity values are influenced by the fatty acid composition. In the present work Pongamia Honge Oil Methyl Ester (HOME) and Rubber Seed Oil Methyl Ester (ROME) are studied and their properties are determined experimentally for a temperature range of 25 to 80C. It has been observed that thermal conductivity of HOME decreases from 0.168 to 0.124 W/mK and for ROME thermal conductivity decreases from 0.143 to 0.113 W/mK. Thermal degradation and specific heat were studied using TGA and DSC. Specific heat was studied in the range from 35 to 120 C. For HOME, the specific heat varies from 2.345 to 2.64 kJ/kgK. For ROME, the specific heat varies from 1.572 to 1.992 kJ/kgK.

scholarly journals Vacuum Distilled Post Blend Crude Palm and Rubber Seed Oil Methyl Esters: Optimisation and Parametric Studies

2016 ◽  
Vol 148 ◽  
pp. 479-486 ◽  
Author(s):  
Awais Bokhari ◽  
Suzana Yusup ◽  
Lai Fatt Chuah ◽  
Ruzaimah Nik M. Kamil
Keyword(s):  
Seed Oil ◽  
Methyl Esters ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Parametric Studies

Preparation of Biodiesel from Crude Rubber Seed Oil by Alkaline Transesterification

2012 ◽  
Vol 581-582 ◽  
pp. 133-137
Author(s):  
Hong Wang ◽  
Yan Lin Sun ◽  
Li Zhang
Keyword(s):  
Fatty Acids ◽  
Yunnan Province ◽  
Seed Oil ◽  
Methyl Esters ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Optimum Technique ◽  
Acid Catalyzed

Abstract: This paper is focused on the preparation of biodiesel from crude rubber seed oil with high free fatty acids (FFA) content. The rubber seeds were collected in Xishuangbanna, Yunnan province. Two-step synthesis was selected to obtain the product, that is, acid catalyzed esterification was carried out first to decrease the FFA content, then methyl esters of fatty acids can be formed by alkaline transesterification. The reaction conditions of alkaline transesterification were investigated. The results show that the optimum technique is to carry out the reaction at 60°C for 1.5h, with the methanol-to-oil molar ratio 6:1, the catalyst amount 1.0% (g NaOH/ g oil). The yield can reach 75%. GC analysis shows the content of methyl esters of fatty acids is 82.29%. Some properties of biodiesel prepared are also presented.

scholarly journals Stabilizing Effect of Biobased Additives on the Thermal Degradation of PVC

2010 ◽  
Vol 1 ◽  
pp. 47-56
Author(s):  
T.O. Egbuchunam ◽  
F.E. Okieimen ◽  
D.B. Balköse
Keyword(s):  
Thermal Degradation ◽  
Seed Oil ◽  
Thermal Stabilization ◽  
Aqueous Alcohol ◽  
Scanning Calorimetry ◽  
Thermal Methods ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Thermal Stabilizer ◽  
Stabilizing Effect

Novel biobased additives prepared from rubber seed oil were evaluated as thermal stabilizer for PVC. Divalent metal (barium and cadmium) soaps of rubber seed oil were prepared by metathesis in aqueous alcohol and characterized by thermal methods (differential scanning calorimetry and thermogravimetry). The stabilizing effect of the soaps and their admixtures on the thermal degradation of PVC powder and plasticized PVC was examined by dynamic thermogravimetry and dehydrochlorination studies at 160oC using the Thermomat equipment. The metal soaps showed multiple decomposition endotherms but were generally stable (with weight loss less than 5%) within the temperature range (180 – 220oC) frequently used in the processing of PVC. Using the Broido model, values of apparent activation energy of decomposition of between 50 and 200 kJmol-1 were obtained for the soaps. The biobased additives were found to be relatively effective in stabilizing PVC in powder and plasticized forms against thermal degradation. Using inhibition/retardation time, temperature of incipient decomposition, and temperature at which various extents of decomposition was attained as indices of thermal stabilization, the results from this study indicate a potential for the application of the biobased additives as thermal stabilizer for PVC in rigid and flexible formulations.

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