NOPR Collection:

Pilot scale studies in a fluidized bed for studying influence of distributor design in bed hydrodynamics

2016-09-29T08:39:24Z

Title: Pilot scale studies in a fluidized bed for studying influence of distributor design in bed hydrodynamics Authors: Kelkar, Raveendra; Sudhakar, T M; Kumar, G N Sashi; Rao, S V G; Guha, K C; Sarkar, S Abstract: Experiments in fluidized bed have been carried out with various designs of multi-cone distributor to study the change in hydrodynamic behaviour in a fluidized bed. An empirical model for the distributor pressure drop (empty bed) has been proposed based on experimental data. This equation will be helpful in diagnosing the clogged distributors. An aspect ratio of 1.8 (height of bed _{at U=0} / diameter of bed) or higher is found to avoid channeling and maintain bubbling fluidization. Also a smooth increase in with superficial gas velocity has been identified to represent the condition of uniform fluidization. This parameter was able to differentiate channeling and high expansion in the fluidized bed. Page(s): 362-367

Removal of contaminants from industrial effluents using nano photocatalyst BaO₃TiO.SrO₃TiO.

2016-09-29T07:28:17Z

Title: Removal of contaminants from industrial effluents using nano photocatalyst BaO₃TiO.SrO₃TiO. Authors: Nihalani, Shamta; Vijay, Ankita; Bhardwaj, Shipra Abstract: Dyes are used widely in various colour industries like pulp, yarn, plastic etc. These dye materials are excreted in environment which pollutes it. A dye as case study, Brilliant Green has been removed through photo catalytic degradation process using a new semiconductor BaO₃TiO.SrO₃TiO. Optimum conditions are arrived at by varying pH, concentration of dye, amount of semiconductor, intensity of light etc. The process follows pseudo first order kinetics which is confirmed on kinetic parameters. Formation of non-toxic degraded products like NO₂, CO₂, H₂O etc. makes the process of immense importance. Participation of OH free radical is confirmed by scavenger study. Page(s): 437-441

Feasibility studies of formation of carbon foam from high sulfur Meghalaya coal

2016-09-29T07:25:58Z

Title: Feasibility studies of formation of carbon foam from high sulfur Meghalaya coal Authors: Saikia, Binoy K; Baruah, Bimala P Abstract: Carbon foams have been produced from a high sulfur sub-bituminous Meghalaya (India) coal with good plasticity properties using a two-stage thermal process under different conditions of pressure and temperature. The first stage consists of a controlled carbonisation under pressure at 450°C, while the carbonisation product is baked at 1100°C in the second stage. The foams show macroporous texture. The mean pore size and the volume of pores have been determined. The increase in pressure reduces the pore size, while the pore volume increases with increasing temperature. Page(s): 433-436

New visible spectrophometric methods for the assay of cintapride

2016-09-29T07:22:40Z

Title: New visible spectrophometric methods for the assay of cintapride Authors: Kannajosyula, Murali Krishna; Amperayani, Karteek Rao; Parimi, Uma Devi Abstract: In this study, four new simple, accurate and highly sensitive spectrophotometric methods have been developed for the determination of Cinitapride (CIN), in both pure and in pharmaceutical preparations. The method M₁ [Metol-Cr (VI)] and M₂ (DMPD – CAT) are direct methods. The method M₃ (NBS/Br-/metol - SA) where the drug is oxidised with excess of N-bromosuccunimide in acid medium, followed by the determination of unreacted N-bromosuccunimide with the dye Celestin Blue and M₄ (EDDP/KIO₃), where the coloured species formation appears to be due to the formation of coloured charge-transfer complex are indirect methods. Regresion analysis of Beer’s law plots show good correlation in the concentration range of 4.0-16, 2.0-12.0, 4.0-14 and 2-10 µg/mL for methods M_1, M₂, M₃ and M₄ respectively, and the corresponding molar absorptivity values are 0.6741 × 10⁴, 3.3708 × 10⁴, 2.5155 × 10⁴ and 2.435×10⁴ L mol^-1cm^-1. All variables have been optimized and the results were statistically compared with those of literature methods by employing the student’s T-test and F-test. No interference has been observed from excipients normally added to the tablets. All the methods are new and superior to the existing methods in terms of λ max and molar absorpitivity. The methods can be applied to the routine pharmaceutical analysis of cinitapride in the formulations. Page(s): 425-432

NOPR Collection:

Pilot scale studies in a fluidized bed for studying influence of distributor design in bed hydrodynamics

Removal of contaminants from industrial effluents using nano photocatalyst BaO3TiO.SrO3TiO.

Feasibility studies of formation of carbon foam from high sulfur Meghalaya coal

New visible spectrophometric methods for the assay of cintapride

Removal of contaminants from industrial effluents using nano photocatalyst BaO₃TiO.SrO₃TiO.