http://localhost:8080/xmlui/handle/123456789/1056 2026-04-22T15:49:51Z http://localhost:8080/xmlui/handle/123456789/3309 Title: THERMOGRAVIMETRIC ANALYSIS AND CHARACTERISATION OF YARD WASTE AS A FEEDSTOCK TO GASIFICATION PROCESS Authors: Bhavanam, A.; Sastry, R.C. Abstract: Gasification has great potential to make use of the biomass and wastes as a source for energy among various thermochemical conversion processes. The aim of this work is to study the suitability of yard waste for energy conversion using gasification process by Thermo gravimetric analysis. Yard waste (consisting of leaves, twigs and grass clippings) is collected from the National Institute of Technology Warangal. It is then dried and ground to a particle size of less than 250µm for thermo gravimetric study. Before going to thermo gravimetric analysis; the sample is analyzed to measure the main properties that affect thermal conversion. Moisture content present in the sample is determined by the oven drying method. Proximate is done according to standard ASTM test methods and ultimate analysis is conducted using elemental analyzer. Finally thermo gravimetric analyses is performed at various heating rates of 10, 30, and 50°Cmin-1 in nitrogen (inert) and air (oxidizing) atmospheres. The weight losses of yard waste in inert atmosphere occur in three stages and in air it occurs in four stages. Description: NITW 2013-11-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/3221 Title: Physical and Optical absorption Studies on xNa2O-(40-x) Bi2O3-20CdO-40B2O3 glasses Authors: R., Vijaya Kumar; V., Rajashekar Reddy; S., Srinu Naik; K., Siva Kumar Abstract: Glasses with composition xNa2O-(40-x)Bi2O3-20CdO-40B2O3 where (0 ≤ x ≤ 40) have been prepared using melt quench technique. Optical absorption spectra of the pure glasses reveled that the cutoff wave length decreases and optical band gap (Eopt) increases where as Urbach energy (ΔΕ) decreases with increase in Na2O content. The Eopt values of these glasses are found to be in the range 2.818-3.217 eV where as the values of ΔΕ are in the range 0.23-0.35 eV. Description: NITW 2014-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/3116 Title: Investigation of corrosion inhibition performance of ultrasonically prepared sodium zinc molybdate nanopigment in two-pack epoxy-polyamide coating Authors: Kapole, Sameer A.; Bhanvase, Bharat A.; Pinjari, Dipak V.; Gogate, Parag R.; Kulkarni, Ravindra D.; Sonawane, Shirish H.; Pandit, Aniruddha B. Abstract: In the present work, an innovative approach has been used to synthesize sodium zincmolybdate nanopigment using ultrasound-assisted co-precipitation of sodium molyb-date and zinc oxide. X-ray diffraction, Fourier transform infrared and elemental anal-ysis of sodium zinc molybdate nanopigment have been performed which confirmedthe formation of sodium zinc molybdate particles. Ultrasound-assisted synthesis gavelower particle size of sodium zinc molybdate nanoparticles (467 nm) which can beexplained on the basis of improved solute transfer rate, rapid nucleation, and forma-tion of a large number of nuclei in the presence of ultrasound. The corrosion inhibi-tion effect of sodium zinc molybdate nanopigment in 2K (two-pack) epoxy-polyamide clear coat on low carbon steel has also been studied. The results of thecorrosion rate analysis, Tafel plots, and electrochemical impedance spectroscopy ofthe prepared coatings show better corrosion inhibition performance when sodiumzinc molybdate particles were incorporated in the 2K epoxy-polyamide clear coat. Description: NITW 2014-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2788 Title: Pressure Drop and Gas Holdup Studies in a Spout-Fluid Bed Authors: BASHAPAKA, SUJAN KUMAR; ANANTHULA, VENU VINOD Abstract: Spout-fluid beds are used for a variety of processes involving particulate solids. They are employed where the particle agglomeration, dead zones, and sticking of particles to the vessel are the common problems in conventional spouted beds. Applications involved are granulation, coating, drying, combustion, and gasification. In this study, experimental studies have been carried out in a cylindrical Perspex column (0.094 m internal diameter and 1.217 m height) using glass beads and air. The effects of initial bed loading, spout velocity, and background (fluidization) velocity on pressure drop and gas holdup have been investigated. It is found that the minimum spout-fluidizing velocity increases with increase in initial bed loading. The pressure drop and gas holdup increase with increasing bed loading. In spout-fluid bed condition, at a constant spout velocity, as the background gas velocity increases, the gas holdup increases, and it is found to be high for smaller bed loading and is low for larger bed loading at higher velocities. The fountain height increases as spouting velocity increases and it decreases with initial bed loading. The total velocity required to fluidize the particles in spout fluidization is lower in comparison to spouted beds and fluidized beds. Description: NITW 2015-01-01T00:00:00Z