Inventory audit notice: TAPPI Press orders will not be processed from August 21–28 during our fiscal year-end inventory audit. Orders placed during this time will ship starting August 31, in the order received. Normal payment processing also resumes August 31.

Thanks for your patience — this helps us serve our members better.

Search

Use the search bar or filters below to find any TAPPI product or publication.

Showing 1,091–1,100 of 1,743 results (Duration : 0.013 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Collections

Journal articles
Open Access
Examination of moisture content variation within an operational wet deck, TAPPI JOURNAL January 2013

Examination of moisture content variation within an operational wet deck, TAPPI JOURNAL January 2013

Journal articles
Open Access
Guest Editorial: TAPPI Journal showcases the best of PEERS 2012, TAPPI JOURNAL July 2013

Guest Editorial: TAPPI Journal showcases the best of PEERS 2012, TAPPI JOURNAL July 2013

Journal articles
Open Access
The effects of coating structure and water-holding capacity on the oxygen-scavenging ability of enzymes embedded in the coating layer, TAPPI JOURNAL June 2013

The effects of coating structure and water-holding capacity on the oxygen-scavenging ability of enzymes embedded in the coating layer, TAPPI JOURNAL June 2013

Journal articles
Magazine articles
Open Access
Pilot scale black liquor concentration using pressure driven membrane separation, TAPPI Journal April 2023

ABSTRACT: Black liquor concentration using pressure driven membrane separation has long been proposed as a means of achieving energy savings and breaking production bottlenecks. To date, limitations in membrane performance and stability under black liquor process conditions have prevented those promises from being realized out-side of tightly controlled laboratory settings. In this work, we describe the first successful pilot scale field deployments of a membrane system for black liquor concentration. Using a purpose-built system and commercial sized, spiral wound graphene oxide membrane elements, we have logged nearly 6000 h of runtime across deployments to multiple mill sites. We demonstrate concentration of black liquor from 14% to >20% total solids, while generating permeate water comparable in quality to that of evaporator condensate and an 81% reduction in energy consumption relative to evaporation. At a commercial scale, these results translate to $2 M/year in net energy savings for a typical mill, as well as an opportunity to support production increases or mill expansions. These results represent a significant leap forward in the ability of membrane systems to deliver substantial value via black liquor concentration.

Journal articles
Magazine articles
Open Access
Evaluation of soap recovery efficiency from black liquor — analytical tools, TAPPI Journal April 2023

ABSTRACT: Soap skimmings (“soap”) are typically recovered from black liquor in kraft mills that process a high percentage of softwood. In many mills, the recovery of soap is inefficient, negatively impacting performance of evaporators and recovery boilers and resulting in loss of potential revenue. A thorough evaluation of soap recovery performance in a kraft mill requires measurement of soap content in black liquor at various sampling locations, especially around the soap skimmer.The standard laboratory method for evaluating soap content in black liquor is a complex, multi-step process that relies on solvent extraction and titration; most mills send these samples to an outside laboratory for this analysis. In this study, 100 black liquor samples, with a wide range of soap concentrations, were tested by the standard solvent extraction method. After additional dilution, each sample was also tested for surface tension with a bubble pressure tensiometer. The results were found to correlate very closely with the solvent extraction tests results. This alternate method, using surface tension measurements of diluted black liquor samples, produces rapid results and can be easily implemented in most kraft mills, which would facilitate much more frequent in-house evaluations of soap recovery performance.

Journal articles
Open Access
Relationship of Surface Strength and Bulk Strength Properties in Uncoated Woodfree Paper, TAPPI JOURNAL February 2011

Relationship of Surface Strength and Bulk Strength Properties in Uncoated Woodfree Paper, TAPPI JOURNAL February 2011

Journal articles
Open Access
Water profiles of the forest products industry and their utility in sustainability assessment, TAPPI JOURNAL July 2011

Water profiles of the forest products industry and their utility in sustainability assessment, TAPPI JOURNAL July 2011

Journal articles
Open Access
A method for measuring the in-plane compressive strength and the compression behavior of coating layers, TAPPI JOURNAL July 2011

A method for measuring the in-plane compressive strength and the compression behavior of coating layers, TAPPI JOURNAL July 2011

Journal articles
Open Access
On-and off-machine soft-nip surface finishing of coated groundwood and wood-free paper grades, TAPPI JOURNAL August 1988

On-and off-machine soft-nip surface finishing of coated groundwood and wood-free paper grades, TAPPI JOURNAL August 1988

Journal articles
Open Access
Controlling wastewater color via coagulation and flotation separation, TAPPI JOURNAL February 1988 88FEB37

Controlling wastewater color via coagulation and flotation separation, TAPPI JOURNAL February 1988

Inside this Section