Doctoral Dissertations

Keywords and Phrases

Dye Adsorption; Dye Removal; Enhanced Oil Recovery; Hydrogels; Preformed particle gels (PPGs); Thermally stable polymers

Abstract

Here, we present a systematic approach to design robust hydrogel compositions. The goal was to achieve excellent properties to open up new opportunities in especially two challenging applications not previously well-served by hydrogels.

The first part of this research will discuss the systematic screening of polymers for their hydrothermal stability under brine, acidic, neutral, and basic pH conditions followed by novel designs of hydrogel compositions. Certain hydrogel compositions withstand temperatures of up to 150 °C for more than 24 months in high salinity brines. This novel hydrogel composition fills a technology gap between the existing polyacrylamide-based preformed particle gels (PPGs) technology, which readily degrades above 110 °C temperature. We demonstrate the hydrogel ability to reduce effective permeability of open fractures through a core flood test.

The second part of the research will discuss the application of these hydrogels as superadsorbent materials for removal of organic dyes from industrial wastewater. The hydrogel composition discussed showed superabsorbance properties with swelling ratios of up to 27,500% which contributed towards an excellent methylene blue dye adsorption capacity of 1270 mg/g with more than 98% dye removal efficiency, and good recyclability. Additionally, the dye-polymer adsorption process demonstrates pseudo-first order kinetics and follows a Freundlich adsorption isotherm model that applies for multilayer, heterogeneous adsorption processes.

Owing to the novel features provided by the compositions, the hydrogels show significant potential for use in many other high-performance, advanced applications”--Abstract, page v.

Advisor(s)

Schuman, Thomas P.
Bai, Baojun

Committee Member(s)

Woelk, Klaus
Nath, Manashi
Nam, Paul Ki-souk

Department(s)

Chemistry

Degree Name

Ph. D. in Chemistry

Comments

The author thanks sponsors, ConocoPhillips Co; Occidental Petroleum Corporation (OXY), Daqing Wantong Chemical Co. and PetroChina for their support and funding for this project.

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2021

Journal article titles appearing in thesis/dissertation

  • Ultra-high temperature resistant preformed particle gels for enhanced oil recovery
  • Development and evaluation of ultra-high temperature resistant preformed particle gels for conformance control in north sea reservoirs
  • Experimental data on water soluble polymers thermal and hydrolytic stability, reactivity ratios of monomers and Frr calculation for thermally stable preformed particle gels therefrom
  • Super-adsorbent hydrogels for removal of methylene blue from aqueous solution: Dye adsorption isotherms, kinetics, and thermodynamic properties

Pagination

xix, 169 pages

Note about bibliography

Includes bibliographic references.

Rights

© 2021 Buddhabhushan Pundlik Salunkhe, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 11964

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