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A Preliminary Assessment of Aqueous Ethanol Pulping of Bagasse: the Ecopulp Process

Lavarack, Bryan, Rainey, Thomas, Falzon, Kaye, & Bullock, Graeme (2005) A Preliminary Assessment of Aqueous Ethanol Pulping of Bagasse: the Ecopulp Process. In Hogarth, D (Ed.) Proceedings of Australian Sugar Cane Technologists, Australian Society of Sugar Cane Technologists, Australia, Queensland, Brisbane, pp. 454-461.

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Abstract

SRI has examined the organosolv (organic solvation) pulping of Australian bagasse using technology supplied by Ecopulp. In the process, bagasse is reacted with aqueous ethanol in a digester at elevated temperatures (between 150ºC and 200ºC). The products from the digester are separated using proprietary technology before further processing into a range of saleable products. Test trials were undertaken using two batch digesters; the first capable of pulping about 25 g of wet depithed bagasse and the second, larger samples of about 1.5 kg of wet depithed bagasse. From this study, the unbleached pulp produced from fresh bagasse did not have very good strength properties for the production of corrugated medium for cartons and bleached pulp. In particular, the lignin contents as indicated by the Kappa number for the unbleached pulps are high for making bleached pulp. However, in spite of the high lignin content, it is possible to bleach the pulp to acceptable levels of brightness up to 86.6% ISO. The economics were assessed for three tier pricing (namely low, medium and high price). The economic return for a plant that produces 100 air dry t/d of brownstock pulp is satisfactory for both high and medium pricing levels of pricing. The outcomes from the project justify that work should continue through to either pilot plant or upgraded laboratory facility.

Impact and interest:

6 citations in Web of Science®
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ID Code: 25639
Item Type: Conference Paper
Keywords: Bagasse, Organsolv, Sugar Cane, Pulp, Ethanol
ISSN: 0726-0822
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400) > Chemical Engineering not elsewhere classified (090499)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Timber Pulp and Paper (091210)
Divisions: Current > Research Centres > Centre for Tropical Crops and Biocommodities
Copyright Owner: Copyright 2005 Australian Society of Sugar Cane Technologists
Deposited On: 18 Jun 2009 01:19
Last Modified: 29 Jun 2012 14:52

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