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51315-6076-Kinetic and Morphological Investigation of Strontium Sulfate Precipitation in the Presence of Biopolymers and Synthetic Polymers for Oilfield Applications

Picture for Kinetic and Morphological Investigation of Strontium Sulfate Precipitation in the Presence of Biopol
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Product Number: 51315-6076-SG
ISBN: 6076 2015 CP
Author: Zahid Amjad
Publication Date: 2015
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In this investigation conductivity method has been used to study precipitation and inhibition of strontium sulfate (SrSO4 Celestite) scale from aqueous solutions. Additives evaluated include biodegradable polymers (e.g. lignosulfonate carboxymethyl inulin) and synthetic polymers (e.g. acrylic and maleic acid based homo- and copolymers of varying molecular weight and compositions). It has been found that addition of low concentrations of additive has a twofold effect: a) it delays the precipitation of SrSO4 and b) it influences the rate of SrSO4 precipitation. The retarding effect of these additives has been attributed to the blocking of active sites by adsorption of additives molecules at the crystal precipitation surfaces. The action of these additives can be interpreted in terms of a Langmuir-type adsorption isotherm. Additionally formation of SrSO4 in the absence and presence of additives has been verified by XRD and SEM analyses.
In this investigation conductivity method has been used to study precipitation and inhibition of strontium sulfate (SrSO4 Celestite) scale from aqueous solutions. Additives evaluated include biodegradable polymers (e.g. lignosulfonate carboxymethyl inulin) and synthetic polymers (e.g. acrylic and maleic acid based homo- and copolymers of varying molecular weight and compositions). It has been found that addition of low concentrations of additive has a twofold effect: a) it delays the precipitation of SrSO4 and b) it influences the rate of SrSO4 precipitation. The retarding effect of these additives has been attributed to the blocking of active sites by adsorption of additives molecules at the crystal precipitation surfaces. The action of these additives can be interpreted in terms of a Langmuir-type adsorption isotherm. Additionally formation of SrSO4 in the absence and presence of additives has been verified by XRD and SEM analyses.
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