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RISS 인기검색어
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- 저자 : Zhenyu Wan (검색결과 3 건)
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Bond reactivity and antioxidant effect on the autoxidation of soybean oil
Kyu-Wan Lee,Zhenyu Hong,Fengnv Piao,Young-Wun Kim,Keun-Woo Chung 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.3
Soybean oil (SBO) contains many unsaturated fatty acids, so that it can be easily oxidized by air/oxygen. Therefore the autoxidation of soybean oil was performed to investigate the bond reactivities of allylic,bisallylic CH2, a-CH2, b-CH2, chain CH2 and CH2O of backbone in the presence and absence of phenolic and aniline antioxidants by means of iodometry and 500 MHz 1H NMR spectroscopy. From the active oxygen concentration, the inhibiting effect and by application of proton integration of each bond of pure and oxidized soybean oil to the first order rate equation, got firstly the orders of the reactivity of each C–H bond and inhibiting effect of antioxidants. In the presence of 2,6-di-t-butyl-4-cresol, three phenol adducts from oxidation product also firstly were identified by means of GC–MS spectroscopy. Crown Copyright 2010 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry. All rights reserved.
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Bond reactivity and antioxidant effect on the autoxidation of soybean oil
Lee, Kyu-Wan,Hong, Zhenyu,Piao, Fengnv,Kim, Young-Wun,Chung, Keun-Woo Elsevier 2010 Journal of industrial and engineering chemistry Vol.16 No.3
<P><B>Abstract</B></P><P>Soybean oil (SBO) contains many unsaturated fatty acids, so that it can be easily oxidized by air/oxygen. Therefore the autoxidation of soybean oil was performed to investigate the bond reactivities of allylic, bisallylic CH<SUB>2</SUB>, α-CH<SUB>2</SUB>, β-CH<SUB>2</SUB>, chain CH<SUB>2</SUB> and CH<SUB>2</SUB>O of backbone in the presence and absence of phenolic and aniline antioxidants by means of iodometry and 500MHz <SUP>1</SUP>H NMR spectroscopy. From the active oxygen concentration, the inhibiting effect and by application of proton integration of each bond of pure and oxidized soybean oil to the first order rate equation, got firstly the orders of the reactivity of each C–H bond and inhibiting effect of antioxidants. In the presence of 2,6-di-<I>t</I>-butyl-4-cresol, three phenol adducts from oxidation product also firstly were identified by means of GC–MS spectroscopy.</P>
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Dapeng Li,Peng Zhang,Jiangtao Duan,Yaxin Wu,Na Ding,Zhenyu Wan,Longqi Chen,Jingli Xu,Suxiang Ge,Juntao Ma 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
Utilization of fly ash (FA) wastes as the carriers of catalysts for the environmental application is an economicand practical strategy for their low cost, easy accessibility and thermal stability. However, mostcatalysts immobilized on fly ash were metal or metal oxides, some potential catalysts such as metalphthalocyanine complexes have not been reported upon their heterogeneous catalysis with FA as the carriers. In this paper, highly active iron octacarboxyphthalocyanine were immobilized onto the bird nestlikesurfaces of fly ash microspheres after NaOH activation. It is noted that the FeOCPc@FA compositeswith only 2 wt.% exhibited the high catalytic efficiency in the organic dye degradation. The high concentrationof 30 mg/L rhodamine B and methylene blue could be fast decolorized in the presence ofFeOCPc@FA–2 % and KHSO5. Moreover, the ultrafast decolorization of these dyes could be observed inthe catalytic system composed of FeOCPc@FA–2 %, KHSO5 and BuOOH (tert-butyl hydroperoxide). Simultaneous activation of KHSO5 and BuOOH could be realized in our designed catalytic system. Based on the structural characterizations of composites and active species generated during the catalyticprocesses, the probable generation pathway of metal–oxygen active species and various radicals wereanalyzed to explicate the catalytic mechanism. Our investigation provides a high efficiency, low costand environmentally friendly strategy for advanced oxidation treatment of organic pollutants.
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