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Incorporation of Post-Consumer Pizza Boxes in the Recovered Fiber Stream: Impacts of Grease on Finished Product Quality, 20PEERS Conference

Incorporation of Post-Consumer Pizza Boxes in the Recovered Fiber Stream: Impacts of Grease on Finished Product Quality, 20PEERS Conference

Rehabilitating Aging Plant Pipelines with Minimal Operational Downtime, 20PEERS Conference

Rehabilitating Aging Plant Pipelines with Minimal Operational Downtime, 20PEERS Conference

DEVELOPMENT OF CONVERGING-DIVERGING MULTI-JET NOZZLES FOR MOLTEN SMELT SHATTERING IN KRAFT RECOVERY BOILERS, 20PEERS Conferene

DEVELOPMENT OF CONVERGING-DIVERGING MULTI-JET NOZZLES FOR MOLTEN SMELT SHATTERING IN KRAFT RECOVERY BOILERS, 20PEERS Conferene

Impact of Ozone Bleaching on Effluent Discharge, 20PEERS Conference

Impact of Ozone Bleaching on Effluent Discharge, 20PEERS Conference

WHERE RCM FITS IN THE MAINTENANCE PROGRAM:, 20PEERS Conference

WHERE RCM FITS IN THE MAINTENANCE PROGRAM:, 20PEERS Conference

How process & mechanical conditions affect lime recovery kiln thrust positions - a review of operations and mechanics for this phenomenon, 20PEERS Conference

How process & mechanical conditions affect lime recovery kiln thrust positions - a review of operations and mechanics for this phenomenon, 20PEERS Conference

Measurement and control of extensional viscosity in barrier coating dispersions, TAPPI Journal November 2023

ABSTRACT: This study aimed to understand the effect of various rheological additives on the extensional viscosity of barrier coating dispersions, as well as to understand the role extensional viscosity plays in stabilizing a liquid curtain. The apparent extensional viscosity was measured using two devices that create accelerating flows: a capillary viscometer and an orifice rheometer. Additives tested include several polyvinyl alcohols, a high molecular weight polyethylene oxide, and carboxymethylcellulose. Extensional viscosity plays a significant role in stabilizing a liquid curtain, as it slows down hole expansion and prevents impurities and disturbances from causing holes in the first place. Some of the additives could substantially increase the extensional viscosity of the dispersions without increasing the shear viscosity outside the typical range of processability for a curtain coater. Some of the additives exhibited coil-stretch transition, meaning they start increasing extensional viscosity above a certain extension rate. Polymers with low chain lengths exhibited finite extensibility, which indicates the polymer chain has fully extended and cannot provide further extensional viscosity, even though the extending force is increased. Polymeric additives with stiff or branched chains significantly raised shear viscosity without increasing extensional viscosity. Both methods could reliably measure extensional viscosity in curtain coating barrier dispersions.

SetPoint: That’s My Jam, November/December 2023 Paper360º

A new approach for the preparation of cellulose nanocrystals from bamboo pulp through extremely low acid hydrolysis, TAPPI Journal January 2020

ABSTRACT: As a renewable and biodegradable nanomaterial, cellulose nanocrystal (CNC) has a wide range of potential applications, but production of CNC faces significant challenges in capital investment and manufacturing cost. In this work, the one-step preparation of CNC from bleached kraft bamboo pulp by extremely low acid (concen-tration of acid = 0.1 wt%) hydrolysis was demonstrated. The experimental data indicated that the yield of CNC was strongly affected by the operating pressure and concentration of hydrochloric acid (HCl), as well as temperature. Rod-like CNC with a mean particle size of 524 nm was obtained through an extremely low acid (ELA) hydrolysis pro-cess. The yield of CNC can reach to 37.1% by an ELA hydrolysis process at 180°C for 60 min with 0.08 wt% HCl and 20 MPa operating pressure. The Fourier transform-infrared spectroscopy (FTIR) measurements show that the as-pre-pared CNC maintained cellulose structure. Compared with a conventional CNC prepared by strong sulfuric acid (H2SO4) hydrolysis, the CNC prepared by ELA hydrolysis process exhibited much higher thermal stability.

Root cause analysis of cationic polymer additive efficiency decline in virgin and recycle containerboard mills, TAPPI Journal January 2020

ABSTRACT: It is well known that retention, drainage and strength polymers struggle to perform (if at all) in virgin containerboard mills. In-depth studies have been undertaken in this area for more than seven years, investigating the issue from all directions. A key finding of this work is that soluble lignin is detrimental to chemical efficiency. A strong correlation exists between decreased chemical efficiency and high soluble lignin. Both recycled systems and virgin systems have been studied, and this correlation holds true regardless of furnish. The primary area of concern is virgin container-board, because these mills tend to have the highest lignin levels. Some highly closed recycled mills can also build elevated lignin levels that can negatively affect chemical efficiency.