Kraft pulping of industrial wood waste

Aziz Ahmed; Masood Akhtar; Gary C. Myers; Gary M. Scott

Treesearch

Kraft pulping of industrial wood waste

Informally Refereed

Authors:

Aziz Ahmed, Masood Akhtar, Gary C. Myers, Gary M. Scott

Year:

1998

Type:

Miscellaneous Publication

Station:

Forest Products Laboratory

Source:

1998 Pulping Conference : October 25-29, 1998, Queen Elizabeth Hotel, Montreal, Quebec, Canada. Atlanta, GA : TAPPI Press, c1998.:p. 993-1000 : ill.

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Abstract

Most of the approximately 25 to 30 million tons of industrial wood waste generated in the United States per year is burned for energy and/or landfilled. In this study, kraft pulp from industrial wood waste was evaluated and compared with softwood (loblolly pine, Douglas-fir) and hardwood (aspen) pulp. Pulp bleachability was also evaluated. Compared to loblolly pine pulp, industrial wood waste pulp needed less cooking time to achieve the same kappa number and achieved a higher pulp yield for a similar kappa number. Industrial wood waste pulp was more effectively bleached than loblolly pine pulp and consumed less chlorine dioxide under similar bleaching conditions. Mechanical properties of paper from industrial wood waste pulp and loblolly pine pulp were very similar except for tear values, which were about two points higher for loblolly pine. Both wood waste and loblolly pine pulps were much stronger than hardwood kraft pulp.

Keywords

Pseudotsuga menziesii, Pinus taeda, Populus, Waste wood, Sulfate pulping, Bleaching, Mechanical properties, Optical properties, Strength, Chlorine dioxide, Kappa number

Citation

Ahmed, Aziz.; Akhtar, Masood.; Myers, Gary C.; Scott, Gary M. 1998. Kraft pulping of industrial wood waste. 1998 Pulping Conference : October 25-29, 1998, Queen Elizabeth Hotel, Montreal, Quebec, Canada. Atlanta, GA : TAPPI Press, c1998.:p. 993-1000 : ill.