Mesoporous Silica from Rice Husk Ash

Abstract

The power usage in mass transfer operations is very important in judging the aeration performance of theaerator on which geometry of the aeration tank imparts a major effect. Optimal geometric conditions arealso needed to scale up the laboratory result to the field installation. Finding geometrical optimal conditionsof a surface aeration system through experiments involves physical constraints and classically parameterscan be optimized by varying one variable at one time and keeping others at constant. In the realexperimental process, it is not possible to vary all others geometric parameters simultaneously. In such acase, the model of the system is built through computer simulation, assuming that the model will result inadequate determination of the optimum conditions for the real system. In this paper, functional model ofpower consumption in the surface aeration systems has been obtained by using neural network technique.Predictability capability of such functional model has been found satisfactorily. In process of optimization,the pertinent dynamic parameter is divided into a finite number of segments over the entire range of observations.For each segment of the dynamic parameter, the neural network model is optimized for the geometricalparameters spanning over the entire range of observations. ©2010 BCREC UNDIP. All rights reserved(Received: 29th May 2010, Revised: 12nd August 2010, Accepted: 7th September 2010)[How to Cite: B. Kumar, T.T. Devi, A.K. Patel, A. Bhatla. (2010). Optimal Geometric Configuration for Power Consumption in Baffled Surface Aeration Tanks. Bulletin of Chemical Reaction Engineering and Catalysis, 5 (2): 87-93. doi:10.9767/bcrec.5.2.795.87-93

Precipitated Silica Derived from Palm Oil Mill Fly Ash: Kinetics and Characterization

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Extraction of Silica from Bamboo Leaves Ash (Bambusoideae) Using Hydrochloric Acid and Nitric Acid

“…Then, silica was produced. Then, the silica will go through an aging process [20][21][22][23]. The silica was then filtered with Whattman No 41 ashes less filter paper and washed with distilled water so that any impurities would be discarded.…”

Preparing high purity white carbon black from rice husk

“…Compared with acid precipitation method, alkali fusion method (involved dissolution of silica in NaOH solution followed by precipitation using acid solutions) was widely used. Shelke, Bhagade, and Mandavgane () produced sodium silicate by reacting rice hull ash (RHA) with aqueous NaOH and precipitated silica from the sodium silicate by acidification. It was found that it was possible to recover over 90% of the silica contained in RHA.…”