Document Type

Article

Publication Date

4-21-2022

Abstract

Stability, structural morphology, and rheological and filtration properties of bentonite (BT)-water suspensions as influenced by the addition of lignocellulosic nanomaterials, including bleached nanofibrillated cellulose (NFC) and lignin-containing NFC (LNFC), and water-soluble polymers (WSPs) were investigated in this work. The performance of the formed fluids varied with the distinct fiber morphology and/or chemical composition of the NFC and LNFC. The NFC helped bridge BT particles for enhanced rheological performance but adversely affected filtration properties by forming thicker filter cakes. Reground NFC led to improved rheological properties owing to more individualized fibers with an enlarged surface area, but its effect on fluid loss was insignificant. LNFC enhanced viscosity, yield stress, and gelation properties of the fluid with effectiveness varying with the actual lignin content in the system. Enhanced filtration performance was seen with the presence of lignin in LNFC ascribed by its hydrophobic nature as well as the formation of more compact filter cakes. The applied biopolymers depicted better compatibility with smaller cellulosic fibril dimensions and lower lignin content. Thus, LNFC with moderate amounts of lignin in combination with biopolymer additives can help achieve much-improved rheological and filtration performance of BT-based fluids with lower cost and more environmental friendliness.

Publication Source (Journal or Book title)

Energy and Fuels

First Page

4479

Last Page

4490

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