Novel Pulping Technology: Directed Green Liquor Utilization (D-GLU) Pulping

Technical Report · Tue Nov 15 04:00:00 EST 2005

DOI:https://doi.org/10.2172/859901· OSTI ID:859901

Lucia, Lucian A ^[1]

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1. North Carolina State University

The general objectives of this new project are the same as those described in the original proposal. Conventional kraft pulping technologies will be modified for significant improvements in pulp production, such as strength, bleachability, and yield by using green liquor, a naturally high, kraft mill-derived sulfidity source. Although split white liquor sulfidity and other high sulfidity procedures have the promise of addressing several of the latter important economic needs of pulp mills, they require considerable engineering/capital retrofits, redesigned production methods, and thus add to overall mill expenditures. Green liquor use, however, possesses the required high sulfidity to obtain in general the benefits attributable to higher sulfidity cooking, without the required capital constraints for implementation. Before introduction of green liquor in our industrial operations, a stronger understanding of its fundamental chemical interaction with the lignin and carbohydrates in US hardwood and softwoods must be obtained. In addition, its effect on bleachability, enhancement of pulp properties, and influence on the overall energy and recovery of the mill requires further exploration before the process witnesses widespread mill use in North America. Thus, proof of principle will be accomplished in this work and the consequent effect of green liquor and other high sulfide sources on the pulping and bleaching operations will be explored for US kraft mills. The first year of this project will generate the pertinent information to validate its ability for implementation in US pulping operations, whereas year two will continue this work while proceeding to analyze pulp bleachability and final pulp/paper properties and develop a general economic and feasibility analysis for its eventual implementation in North America.

• Research Organization: Georgia Tech Research Corporation
• Sponsoring Organization: USDOE; USDOE Office of Industrial Technologies (OIT) - (EE-20)
• DOE Contract Number: FC36-01GO10626
• OSTI ID: 859901
• Report Number(s): DOE/GO10626
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BLEACHING
CAPITAL
CARBOHYDRATES
ECONOMICS
EXPENDITURES
EXPLORATION
Green Liquor
Kraft Pulping
Forest Products
Pulp Mills
Higher Sulfidity Cooking
IMPLEMENTATION
LIGNIN
PRODUCTION
SULFIDES