Optimization of Calcium Sulfate Precipitated in the Laminar Flow Pipe through Response Surface Modeling of Temperature, Ca2+ Concentration and Citric acid Additives

Raharjo, S. and Muryanto, S. and Jamari, J. and Bayuseno, A.P. (2016) Optimization of Calcium Sulfate Precipitated in the Laminar Flow Pipe through Response Surface Modeling of Temperature, Ca2+ Concentration and Citric acid Additives. Oriental Journal of Chemistry, 32 (6). pp. 3145-3154. ISSN ISSN : 0970 - 020X, ONLINE ISSN : 2231-5039

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Official URL: http://www.orientjchem.org/vol32no6/optimization-o...

Abstract

This paper presents results of investigation of scaling of calcium sulfate (CaSO4) on metallic pipes. In this study, the optimizing variables; namely temperature (50-600C), concentration of Ca2+ (2000-3000 ppm), citric acid concentration (10-20 ppm) were set-up to provide the optimum yield of the mass scales. The mineral scale detected using XRD is mainly gypsum, and the scale has a plate like morphology under SEM examination. SRM (surface response methodology) prediction provided that the temperature is a significant factor, while the Ca2+ concentration and the citrate are insignificant variables determining the optimal condition of the mass scale yields. An optimized mass scale response of 119.99 mg was obtained at a temperature of 56.36 OC, concentration Ca2+ of 2649.21 ppm and citric acid concentration of 12.11 ppm, respectively. The addition of citric acid did not modify the crystal morphology, but may control the size of crystals.

Item Type:Article
Uncontrolled Keywords:Calcium sulfate; Surface response methodology (SRM); XRD/SEM analysis; Gypsum
Subjects:T Technology > TP Chemical technology
T Technology > TS Manufactures
Divisions:Faculty of Engineering > Department of Mechanical Engineering
Faculty of Engineering > Department of Mechanical Engineering
ID Code:71661
Deposited By:Mr. Sugeng Priyanto
Deposited On:15 Apr 2019 21:12
Last Modified:24 Aug 2019 14:23

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