Title

Kinetics and Equilibria of Calcium Lignosulfonate Adsorption and Desorption onto Limestone

Abstract

Equilibria and kinetics are two basic ingredients for the proper understanding of adsorption and desorption processes between surfactants and rocks. The adsorption and desorption of calcium lignosulfonate (CLS), commonly used as a sacrificial agent in surfactant-based EOR processes, was studied. Equilibrium results showed that CLS adsorption and desorption onto limestone could be described well by the Langmuir isotherm over the tested CLS concentration range, and that increasing concentration increases adsorption density. Increasing flow rate slightly decreased CLS equilibrium adsorption. Increasing both NaCl and CaCl2 concentrations increased adsorption density; however, CaCl2 had a much greater impact on the adsorption. Increasing pH decreased CLS adsorption onto limestone. Desorption was a much slower process than adsorption.

Meeting Name

SPE International Symposium on oilfield Chemistry (2005: Feb. 2-4, The Woodlands, TX)

Department(s)

Geosciences and Geological and Petroleum Engineering

International Standard Serial Number (ISSN)

10461779

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2005 Society of Petroleum Engineers (SPE), All rights reserved.

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