Comparison of Superacid-Catalyzed Depolymerization and Thermal Depolymerization of Bituminous CoalCatalysis by Superacid HF/BF3and Synthetic Pyrite

1999 ◽  
Vol 13 (6) ◽  
pp. 1223-1229 ◽  
Author(s):  
Kiyoyuki Shimizu ◽  
Hiroyuki Kawashima
Keyword(s):  
Thermal Depolymerization

scholarly journals Polymeric waste valorization at a crossroads: Ten ways to bridge research on model and complex/real feedstock

2021 ◽  
Author(s):  
Idoia Hita del Olmo ◽  
Subram Mani Sarathy ◽  
Pedro Castaño
Keyword(s):  
Waste Valorization ◽  
Thermal Depolymerization ◽  
Polymeric Waste ◽  
Catalytic Treatment

The valorization of polymeric waste, such as biomass, tires, and plastics, via thermal depolymerization (i.e., pyrolysis and liquefaction) and simultaneous or subsequent catalytic treatment has gained enormous momentum. The inherent...

scholarly journals Simulation and Experimental Investigation on Carbonized Tracking Failure of EPDM/BN-Based Electrical Insulation

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 582 ◽  
Author(s):  
Muhammad Tariq Nazir ◽  
Faizan Tahir Butt ◽  
Bao Toan Phung ◽  
Guan Heng Yeoh ◽  
Ghulam Yasin ◽  
...  
Keyword(s):  
Leakage Current ◽  
Failure Time ◽  
Harmonic Component ◽  
Experimental Results ◽  
Shielding Effect ◽  
Surface Discharge ◽  
Melt Mixing ◽  
Electrical Field ◽  
Third Harmonic ◽  
Thermal Depolymerization

Ethylene propylene diene monomer (EPDM) is broadly employed as an insulating material for high voltage applications. Surface discharge-induced thermal depolymerization and carbon tracking adversely affect its performance. This work reports the electrical field modeling, carbon tracking lifetime, infrared thermal distribution, and leakage current development on EPDM-based insulation with the addition of nano-BN (boron nitride) contents. Melt mixing and compression molding techniques were used for the fabrication of nanocomposites. An electrical tracking resistance test was carried out as per IEC-60587. Simulation results show that contamination significantly distorted the electrical field distribution and induced dry band arcing. Experimental results indicate that electric field stress was noticed significantly higher at the intersection of insulation and edges of the area of contamination. Moreover, the field substantially intensified with the increasing voltage levels. Experimental results show improved carbonized tracking lifetime with the addition of nano-BN contents. Furthermore, surface temperature was reduced in the critical contamination flow path. The third harmonic component in the leakage current declined with the increase of the nano-BN contents. It is concluded that addition of nano-BN imparts a better tracking failure time, and this is attributed to better thermal conductivity and thermal stability, as well as an improved shielding effect to electrical discharges on the surface of nanocomposite insulators.

scholarly journals Over-all Rate of the Reversible Thermal Depolymerization of α-Polyoxymethylene

1963 ◽  
Vol 84 (1) ◽  
pp. 31-34,A2 ◽  
Author(s):  
Yoshisuke IWASA ◽  
Tatsuya IMOTO
Keyword(s):  
Thermal Depolymerization

Controlled Thermal Depolymerization of Dextran

1953 ◽  
Vol 45 (4) ◽  
pp. 755-759 ◽  
Author(s):  
Ivan A. Wolff ◽  
Paul R. Watson ◽  
John W. Sloan ◽  
Carl E. Rist
Keyword(s):  
Thermal Depolymerization
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