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( Sudhakaran ),( Jayakodi Karuppiah ),목영선 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
A total oxidation of p-xylene by non-thermal plasma reactor (NTP) using anodized aluminium oxide (AAO) support. The AAO is promoted with Mn and Co oxides by impregnation method. The formation of Mn and Co oxides on AAO is confirmed using XRD, XPS and FE-SEM. The performances of the NTP reactor are tested by varying applied voltages and the specific input energies. The observed major and by-products by the decomposition of p-xylene are carbon oxides (CO and CO2) and alcohol, aldehydes respectively. Our experimental results suggested that the Mn, Co oxides on AAO are improved the conversion efficiency, high selectivity than bare AAO. Especially, MnOx shows better performance than CoOx, due to the formation of atomic oxygen by in-situ decomposition of ozone. Overall, the MnOx and CoOx on AAO are efficient catalysts to decompose the toxic p-xylene by NTP technique.
( Sudhakaran ),( J Karuppiah ),목영선 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
In this work, we are successfully studied a destruction of p-xylene by non-thermal plasma reactor (NTP) system at room temperature and atmospheric pressure using nickel foam support. The plasma catalytic system was improved with metal oxides, i.e., Mn, Zn and Ti oxides by impregnation method and various characterisations is analysised-using study XRD, FE-SEM, BET and FT-IR. The performances of the NTP reactor are tested by varying voltage and the specific input energies. Combining plasma with catalyst could improve the p-xylene removal efficiency and the observed major and carbons by-products by the decomposition of p-xylene are carbon oxides. Notably, TiO2 shows better performance than MnOx and ZnO, which might be due to the photo-oxidation activity of TiO2. Finally, the plasma-photo catalyst combined system is useful for the removing of high concentration of p-xylene.
Catalytic Nonthermal plasma reactor for decomposition of p-xylene by MnOx and CoOx/ AAO catalysts
( Sudhakaran ),목영선,( Jayakodi Karuppiah ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
A total oxidation of a model volatile organic compound p-xylene has been studied in a catalytic non-thermal plasma reactor, where anodized aluminium oxide (AAO) was used as an inner electrode. The AAO was further modified with Mn and Co oxides by impregnation, the performance of the NTP reactor was tested for the oxidation of p-xylene in the specific input energy range 480 -1170 (J/l) by varying the high voltage. It has been observed that MnOx and CoOx/AAO catalysts not only improved the conversion of p-xylene, but also increased the selectivity towards total oxidation. Among these two selected catalysts, MnOx/AAO modification showed better performance than CoOx, which may be endorsed to the formation of atomic oxygen by in situ decomposition of ozone. It is possible to completely oxidize for 250 ppm of p-xylene at SIE < 1170 J/l.
( Sudhakaran ),목영선 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Hierarchical NiMoO<sub>4</sub> structures assembled from well-aligned uniform nanosheets(NS) or nanoflowers(NF) have successfully grown on γ -Al<sub>2</sub>O<sub>3</sub> substrates utilizing an active catalyst for dry reforming. The structure of the NiMoO<sub>4</sub> can control by using different temperature. This catalyst is active, selective and stable for the strongly endothermic dry reforming of propane (DRP), as the consequence of its enhanced resistance to coke and sintering. Notably, the catalytic activity of NiMoO<sub>4</sub>/γ-Al<sub>2</sub>O<sub>3</sub> shows that the stoichiometric reaction and negligible by-product. The post characterization of the catalyst of FE-SEM, temperature programmed oxidation (TPO) and Raman result confirmed the less carbon formation and no structural deformation after DRP.
Sudhakaran M,Ramamoorthy D,Swamynathan B,Ramya J 강원대학교 산림과학연구소 2014 Journal of Forest Science Vol.30 No.4
There are very few studies about soil chemical and biological properties under tropical dry evergreen forest Coromandel Coast, India. The present study was conducted in six tropical dry evergreen forests sites such as Oorani, Puthupet, Vadaagram, Kotthatai, Sendrakillai and Palvathunnan. We measured the quantity of soil chemical, biological properties and selected soil microorganisms for investigating the impacts of soil microbial populations on soil chemical and biological properties. The result showed that total N, P, Ca, S, Fe, Mn, Cu, Co, exchangeable K, Olson P, extractable Ca and phosphobacterial population were higher in the soil from Kothattai forest site. Organic carbon, total Mg, extractable Na, soil respiration, β-glucosidase activity, bacterial population, fungi population and actinomycetes population were higher in the soil from Palvathunn forest site. Total K, NH4 +-N, NO3 −-N, exchangeable K, extractable Ca, extractable Na, azotobacter population, bacillus population and rhizobacteria population were higher in the soil from Sendrakillai. Beijerinckia population, rhizobacteria and soluble sodium were higher in Puthupet forest soil. Total Si, total Na and exchangeable K were higher in soil from Oorani forest site. Total Mo and exchangeable K were higher in the soil from Vadaagaram forest site. The results showed that organic carbon, total N, NH4 +-N, NO3 −-N, extractable P, extractable Ca, soil respiration and β-glucosidase were significantly correlated with soil microbial populations. Therefore soil microorganisms are important factor for maintaining soil quality in tropical dry evergreen forest.
In Vitro Flowering Response of Ocimum basilicum L.
Sudhakaran, S.,Sivasankari, V. The Korean Society of Plant Biotechnology 2002 Plant molecular biology and biotechnology research Vol.4 No.4
Nodal explants of Ocimum basilicum L. (Sweet basil, Lamiaceae), showed shoot proliferation after 7-10 days on MS media containing 1.5 mg/L kinetin. In vitro flowering was achieved from 90% of the shootlets which were sub cultured on a half strength MS media fortified with 5 mg/L BAP and 1 mg/L IAA. Cytokinin alone or in combination with $CA_3$and NAA resulted in shoot proliferation only. For rooting the plantlets were subcultured on MS basal medium supplemented with 3 mg/L NAA and rootlets emerged after 10 days of incubation. The survival percentage of transplanted plantlets was 70%.