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RISS 인기검색어
- 검색키워드
- 저자 : Vijaya Kumar Bulasara (검색결과 2 건)
- 무료
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Harjot Kaur,Vijaya Kumar Bulasara,Raj Kumar Gupta 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.44 No.-
Kaolin based ceramic supports were prepared using different amounts of calcium and sodiumcarbonates. The mean pore size and water permeability were in the range 0.3–0.8 mm and78–1027 L/h m2 bar, respectively. Relatively higher porosity, permeability (due to large pores) andchemical stability were obtained for calcium carbonate supports, whereas, higher pore density values(due to small pores) and mechanical strength were obtained for sodium carbonate supports. Mercuryintrusion porosimetry confirmed the results of permeation tests. Results indicated that 20 wt% calciumcarbonate and 10 wt% sodium carbonate are optimum in terms of porosity, mean pore-size and poredensity. A selected support (C2) having 0.5 mm pore size, 37% porosity and 48 MPaflexural strength wasvalidated for microfiltration of oil-in-water emulsions.
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Manju Rawat,Vijaya Kumar Bulasara 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.3
Ceramic microfiltration membranes were prepared using five different compositions formulated with different amounts of fly ash and kaolin and sintered at 900 oC. The SEM analysis evidenced a large number of small pores on the surface of kaolin-rich membranes. The M4 membrane prepared using 25% fly ash and 50% kaolin was found to be optimum as it had a good combination of pore size (0.885 μm), porosity (42.7%), mechanical strength (43.6MPa), and chemical stability (<3% weight loss in acid and 0.02% in base), and this membrane was successfully applied in separation of humic acid from water. The permeate flux data fitted very closely with cake-filtration model, indicating the formation of a cake layer on membrane surface. Membrane fouling was found to be reversible and easily negated by cleaning and backflushing. The regenerated membrane showed better rejection of humic acid than fresh membrane with a flux recovery of above 80%.
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