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RISS 인기검색어
- 검색키워드
- 저자 : T. Murugesan (검색결과 3 건)
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T. Arunkumar,Velmurugan Pavanan,Vijay Anand Murugesan,V. Mohanavel,Karthikeyan Ramachandran 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.1
This study emphasis on a novel fabrication technique to fabricate hybrid cermets using Al 6061 alloy with nano sized SiC,Al2O3 and TiO2 as reinforcements. During the fabrication process, the melted pool was ultrasonicated to disperse nanoparticles at 20 kHz for 5 min and pressure of 50 MPa was applied to eliminate voids. The infuence of nanoparticles on physical,thermal and mechanical properties were evaluated by tensile, wear and thermal studies. Cermets with Al2O3 reinforcementsshowed higher mechanical performance compared to Al alloy. This enhancement could be related to the uniform distribution of Al2O3 with refnement in grain size of Al alloy which was observed via surface analysis. The morphological studiesprovided justifable evidence of homogeneous distribution, nominal cluster along with agglomeration and cavities shrinkingon the cermets. The agglomeration of nanoparticles along with SiC protected the cermet in corrosion and abrasive wearby~97% and~71%. The study evidenced the novel fabrication method using ultrasonic rheo-squeeze casting led to improvement in mechanical and thermal properties of the hybrid cermets.
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Role of ceria in CO<sub>2</sub> adsorption on NaZSM-5 synthesized using rice husk ash
Hemalatha, P.,Bhagiyalakshmi, M.,Ganesh, M.,Palanichamy, M.,Murugesan, V.,Jang, H.T. Korean Society of Industrial and Engineering Chemi 2012 Journal of industrial and engineering chemistry Vol.18 No.1
Ceria (3, 5, 7, 11, 19wt%) impregnated NaZSM-5 was synthesized and studied for adsorption of CO<SUB>2</SUB>. They were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS), CO<SUB>2</SUB>-temperature programmed desorption (CO<SUB>2</SUB>-TPD) and Brunauer-Emmett-Teller (BET) techniques. The heat of the reaction (ΔH<SUB>r</SUB>) derived from differential scanning calorimetry (DSC) analysis was 490Btu/lb. XRD analysis showed a decrease in the intensity of patterns with the increase in the ceria loading but crystallization of ceria to larger size was clearly evident for 11 and 19% loading. The surface area decreased for 3 and 5% loading, but increased for 7, 11 and 19% loading illustrating difference in dispersion. The maximum adsorption capacity of CeO<SUB>2</SUB>(5%)/NaZSM-5 was 130mg/g of sorbent. Extraction of silica from the agricultural waste, rice husk, and its use in the zeolite synthesis was an advantage in this study. Hence, from the study it was concluded that ceria impregnated NaZSM-5 could be treated as a novel material for CO<SUB>2</SUB> adsorption, as they were regenerable and recyclable. This study can also be applied to all other zeolites.
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H.A. Mannan,D.F. Mohshim,H. Mukhtar,T. Murugesan,Z. Man,M.A. Bustam 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-
The objective of this research is to combine the superior features of polyethersulfone (PES) polymer and higher affinity of 1-ethyl-3-methyl imidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf2N]) ionic liquid for CO2 gas, in ionic liquid-polymeric membranes (ILPMs) at higher ionic liquid concentrations. The ionic liquid embedded membranes were characterized and tested for pure carbon dioxide and methane gases at 25 C temperature and at a relatively higher pressure range of 5–25 bar. The morphology of the membranes was dense and defect free as deduced from FESEM analysis. The gas permeation studies confirmed that increasing IL content in ILPMs resulted in the enhancement of both CO2 permeability and CO2/CH4 selectivity simultaneously, due to high affinity of CO2 in IL. This was observed when the permeation of carbon dioxide increased significantly from 2.42 barrer for neat PES membrane to 298.84 barrer (124-fold increment) for ILPM containing 50 wt. % IL, at 25 C and 25 bar. The resultant selectivity was improved from 15.91 to 57.53, which accounted for 3.6-fold increase in the ideal selectivity. The synthesized membranes are promising materials for industrial gas separation membranes for CO2 removal from CH4 gas at higher pressures and higher IL contents.
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