scholarly journals Viscosity Effects on the Thermal Decomposition of Bis(perfluoro-2-N-propoxypropionyl) Peroxide in Dense Carbon Dioxide and Fluorinated Solvents [J.Am. Chem. Soc.2001,123, 7199−7206].

2003 ◽  
Vol 125 (38) ◽  
pp. 11772-11772
Author(s):  
W. Clayton Bunyard ◽  
John F. Kadla ◽  
James DeYoung ◽  
Joseph M. DeSimone
Keyword(s):  
Carbon Dioxide ◽  
Thermal Decomposition ◽  
Viscosity Effects ◽  
Dense Carbon Dioxide ◽  
Fluorinated Solvents

Consequences of CO2 solubility for hydrate formation from carbon dioxide containing water and other impurities

2014 ◽  
Vol 16 (18) ◽  
pp. 8623-8638 ◽  
Author(s):  
Bjørn Kvamme ◽  
Tatiana Kuznetsova ◽  
Bjørnar Jensen ◽  
Sigvat Stensholt ◽  
Jordan Bauman ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Water Content ◽  
Upper Bound ◽  
Hydrate Formation ◽  
Pipeline Transport ◽  
Co2 Solubility ◽  
Complex Issue ◽  
Dense Carbon Dioxide

Deciding on the upper bound of water content permissible in a stream of dense carbon dioxide under pipeline transport conditions without facing the risks of hydrate formation is a complex issue.

Synthesis of Large-Size Diamonds by Reduction of Dense Carbon Dioxide with Alkali Metals (K, Li)

2004 ◽  
Vol 108 (14) ◽  
pp. 4239-4241 ◽  
Author(s):  
Zhengsong Lou ◽  
Qianwang Chen ◽  
Yufeng Zhang ◽  
Yitai Qian ◽  
Wei Wang
Keyword(s):  
Carbon Dioxide ◽  
Alkali Metals ◽  
Large Size ◽  
Dense Carbon Dioxide

scholarly journals Thermal Decomposition of Kraft Lignin under Gas Atmospheres of Argon, Hydrogen, and Carbon Dioxide

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 729 ◽  
Author(s):  
Qiangu Yan ◽  
Jinghao Li ◽  
Jilei Zhang ◽  
Zhiyong Cai
Keyword(s):  
Carbon Dioxide ◽  
Thermal Decomposition ◽  
Kraft Lignin

Lipase-catalyzed long chain fatty ester synthesis in dense carbon dioxide: Kinetics and thermodynamics

2007 ◽  
Vol 41 (1) ◽  
pp. 92-101 ◽  
Author(s):  
Chiara Giulia Laudani ◽  
Maja Habulin ◽  
Željko Knez ◽  
Giovanna Della Porta ◽  
Ernesto Reverchon
Keyword(s):  
Carbon Dioxide ◽  
Fatty Ester ◽  
Ester Synthesis ◽  
Kinetics And Thermodynamics ◽  
Dense Carbon Dioxide ◽  
Long Chain

scholarly journals Study on Thermal Decomposition Behaviors of Terpolymers of Carbon Dioxide, Propylene Oxide, and Cyclohexene Oxide

2018 ◽  
Vol 19 (12) ◽  
pp. 3723 ◽  
Author(s):  
Shaoyun Chen ◽  
Min Xiao ◽  
Luyi Sun ◽  
Yuezhong Meng
Keyword(s):  
Carbon Dioxide ◽  
Thermal Stability ◽  
Thermal Decomposition ◽  
Thermogravimetric Analysis ◽  
Propylene Carbonate ◽  
Cyclohexene Oxide ◽  
Block Polymers ◽  
Rate Method ◽  
Poly Propylene ◽  
Thermal Stability Of

The terpolymerization of carbon dioxide (CO2), propylene oxide (PO), and cyclohexene oxide (CHO) were performed by both random polymerization and block polymerization to synthesize the random poly (propylene cyclohexene carbonate) (PPCHC), di-block polymers of poly (propylene carbonate–cyclohexyl carbonate) (PPC-PCHC), and tri-block polymers of poly (cyclohexyl carbonate–propylene carbonate–cyclohexyl carbonate) (PCHC-PPC-PCHC). The kinetics of the thermal degradation of the terpolymers was investigated by the multiple heating rate method (Kissinger-Akahira-Sunose (KAS) method), the single heating rate method (Coats-Redfern method), and the Isoconversional kinetic analysis method proposed by Vyazovkin with the data from thermogravimetric analysis under dynamic conditions. The values of ln k vs. T−1 for the thermal decomposition of four polymers demonstrate the thermal stability of PPC and PPC-PCHC are poorer than PPCHC and PCHC-PPC-PCHC. In addition, for PPCHC and PCHC-PPC-PCHC, there is an intersection between the two rate constant lines, which means that, for thermal stability of PPCHC, it is more stable than PCHC-PPC-PCHC at the temperature less than 309 °C and less stable when the decomposed temperature is more than 309 °C. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermogravimetric analysis/infrared spectrometry (TG/FTIR) techniques were applied to investigate the thermal degradation behavior of the polymers. The results showed that unzipping was the main degradation mechanism of all polymers so the final pyrolysates were cyclic propylene carbonate and cyclic cyclohexene carbonate. For the block copolymers, the main chain scission reaction first occurs at PC-PC linkages initiating an unzipping reaction of PPC chain and then, at CHC–CHC linkages, initiating an unzipping reaction of the PCHC chain. That is why the T−5% of di-block and tri-block polymers were not much higher than that of PPC while two maximum decomposition temperatures were observed for both the block copolymer and the second one were much higher than that of PPC. For PPCHC, the random arranged bulky cyclohexane groups in the polymer chain can effectively suppress the backbiting process and retard the unzipping reaction. Thus, it exhibited much higher T−5% than that of PPC and block copolymers.

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