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ZSM-5 위에 지지된 Heteropolyacid 하에서 Methacrylic acid와 Ethylene glycol의 에스테르화 반응
Prabhakarn, A.,Fereiro, J.A.,Subrahmanyam, Ch. Korean Chemical Society 2011 대한화학회지 Vol.55 No.1
methacrylic acid과 ethylene glycol과의 에스테르화 반응을 ZSM-5에 지지된 heteropolyacids [HPA: $H_4SiW_{12}O_{40}$(STA)와 $H_3PW_{12}O_{40}$(PTA)] 하에서 수행하였다. 비교를 위하여, 지지하지 않은HPA, $H_2SO_4$, $BF_3$와 PTSA 하에서 같은 반응을 수행하였다. 연구한 촉매 중에서, HPA는 $H_2SO_4$, $BF_3$와 PTSA와 비교하여 더 좋은 활성을 보여주었다. 촉매 활성을 HPA지지 ZSM-5 촉매와 비교하였는데, 그 결과 ZSM-5위에 지지된 30 wt% PTA는 bulk PTA와 거의 같은 활성을 나타내었다. 이 반응은 methacrylic acid에 관하여 1차 속도 법칙을 따랐으며, 반응 생성물은 $^1H$-NMR과 FT-IR을 이용하여 확인하였다. Esterification of methacrylic acid with ethylene glycol was carried out over Heteropolyacids [HPA: $H_4SiW_{12}O_{40}$ (STA) and $H_3PW_{12}O_{40}$ (PTA)] supported on ZSM-5. For comparison, the same reaction was carried out over unsupported HPA, $H_2SO_4$, $BF_3$ and PTSA. Among the catalysts studied, HPA showed better activity compared to $H_2SO_4$, $BF_3$ and PTSA. Catalytic activity was compared with HPA supported ZSM-5 catalysts. Typical results indicated that 30 wt% PTA supported on ZSM-5 showed nearly the same activity as that of bulk PTA. It was found that the reaction follows first order kinetics with respect to methacrylic acid. The reaction products were identified by $^1H$-NMR and FT-IR.
Esterification of Methacrylic acid with Ethylene glycol over Heteropolyacid supported on ZSM-5
A. Prabhakarn,J. A. Fereiro,Ch. Subrahmanyam 대한화학회 2011 대한화학회지 Vol.55 No.1
Esterification of methacrylic acid with ethylene glycol was carried out over Heteropolyacids [HPA: H_4SiW_(12)O_(40) (STA)and H_3PW_(12)O_(40) (PTA)] supported on ZSM-5. For comparison, the same reaction was carried out over unsupported HPA, H_2SO_4,BF_3 and PTSA. Among the catalysts studied, HPA showed better activity compared to H_2SO_4, BF_3 and PTSA. Catalytic activity was compared with HPA supported ZSM-5 catalysts. Typical results indicated that 30 wt% PTA supported on ZSM-5 showed nearly the same activity as that of bulk PTA. It was found that the reaction follows first order kinetics with respect to methacrylic acid. The reaction products were identified by ^1H-NMR and FT-IR.
Theerthagiri, Jayaraman,Durai, Govindarajan,Karuppasamy, K.,Arunachalam, Prabhakarn,Elakkiya, Venugopal,Kuppusami, Parasuraman,Maiyalagan, Thandavarayan,Kim, Hyun-Seok THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2018 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.67 No.-
<P><B>Abstract</B></P> <P>Supercapacitors (SCs) has gained an impressive concentration by the researchers due to its advantages such as high energy and power densities, long cyclic life, rapid charge–discharge rates, low maintenance and desirable safety. Hence it has been widely utilized in energy storage and conversion devices. Among the different components of SC, electrodes play a vital role in the performances of SCs. In this review, we present the recent advances in 2-D nanostructured metal nitrides, carbides, and phosphides based materials for SC electrodes. Finally, the electrochemical stability and designing approach for the future advancement of the electrode materials are also highlighted.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Jayaraman Theerthagiri,Govindarajan Durai,K. Karuppasamy,Prabhakarn Arunachalam,Venugopal Elakkiya,Parasuraman Kuppusami,Thandavarayan Maiyalagan,김현석 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.67 No.-
Supercapacitors (SCs) has gained an impressive concentration by the researchers due to its advantages such as high energy and power densities, long cyclic life, rapid charge–discharge rates, low maintenance and desirable safety. Hence it has been widely utilized in energy storage and conversion devices. Among the different components of SC, electrodes play a vital role in the performances of SCs. In this review, we present the recent advances in 2-D nanostructured metal nitrides, carbides, and phosphides based materials for SC electrodes. Finally, the electrochemical stability and designing approach for the future advancement of the electrode materials are also highlighted.