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Venkata Rao Madduluri Peddinti Nagaiah Challa Prathap Paleti Gidyonu Burri David Raju Kamaraju Seetha Rama Rao 《Journal of Saudi Chemical Society》2019,23(6):678-690
Co3O4/γ-Al2O3 catalysts with variable Co3O4 loadings (5–20 wt%) and deposition of 15% Co3O4 on La2O3/γ-Al2O3 were prepared by wet impregnation method. La2O3-γ-Al2O3 support with variable composition of La2O3 (2–6 wt%) were prepared by co-precipitation method. All the catalysts were tested for oxidative dehydrogenation of ethylbenzene with CO2 as soft oxidant. Among the Co3O4/γ-Al2O3 catalysts, 15% Co3O4/γ-Al2O3 has shown good performance and hence this catalyst has been chosen to investigate the effect of La2O3 species. CO2 pulse chemisorption data indicate more amount of CO2 uptake over 15% Co3O4/4%La2O3/γ-Al2O3 catalyst which clearly indicates that this catalyst exhibits good performance in ethylbenzene dehydrogenation with CO2 as soft oxidant because of reverse water gas shift reaction. Temperature programmed reduction studies indicate that the Co3O4 catalysts follow two step reduction mechanism from Co3O4 to CoO and then to Co and La2O3 promotional effect is visible through facile reduction of Co3O4 species. La2O3 doping has a vital influence in getting enhanced ethylbenzene conversion, styrene yield and alleviates catalyst deactivation compared to that of unpromoted Co3O4/γ-Al2O3 catalyst. TGA studies indicate the presence low amount coke deposition during time-on-stream over 15% Co3O4/4%La2O3/γ-Al2O3 catalyst compared to 15% Co3O4/γ-Al2O3 catalyst. 相似文献
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Challa Prathap Paleti Gidyonu Madduluri Venkata Rao Gadamani Suresh Babu Pothu Ramyakrishna Burri David Raju Boddula Rajender Perugopu Vijayanand Kamaraju Seetha Rama Rao 《Catalysis Surveys from Asia》2022,26(2):80-91
Catalysis Surveys from Asia - At this moment the major challenge for the human beings is to address uninterrupted raise in CO2 emissions and their consequences. The demands of globalization... 相似文献
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Madduluri Venkata Rao Raju Burri David Rao Kamaraju Seetha Rama 《Research on Chemical Intermediates》2019,45(5):2749-2770
Research on Chemical Intermediates - Variety of rare earth oxide-doped CeO2/γ-Al2O3 catalysts were prepared by a wet impregnation method and evaluated for oxidative dehydrogenation of... 相似文献
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Madduluri Venkata Rao Narsinga Raju Mallesh Dosa Mahesh Kumar P. Barapati Shankar Bojja Sreedhar Rama Rao Kamaraju Seetha 《Research on Chemical Intermediates》2020,46(3):1881-1907
Research on Chemical Intermediates - A series of lanthanum oxide (La2O3—2–14 wt%)-encapsulated Co3O4/MgO catalysts and bare Co/MgO solid oxides were prepared by wetness... 相似文献
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Madduluri Venkata Rao Katari Naresh Kumar Peddinti Nagaiah Velpula Venkataramana Kumar Burri David Raju Kamaraju Seetha Rama Rao Jonnalagadda Sreekantha B. 《Research on Chemical Intermediates》2018,44(12):7619-7639
Research on Chemical Intermediates - Excellent catalytic activity of activated redbrick clay (ARB) for dehydration and highly selective conversion of cyclohexanol to cyclohexene and 1-phenylethanol... 相似文献
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