Heat transfer model for estimating pinene emissions from hot-pressing softwood flakeboard

• Published in: Holzforschung Vol. 58; no. 4; pp. 382 - 386
• Main Authors: Radhakrishnan, J.S., Banerjee, S.
• Format: Journal Article
• Language: English
• Published: Berlin Walter de Gruyter 01.01.2004; New York, NY de Gruyter
• Subjects: Applied sciences; Exact sciences and technology; Polymer industry, paints, wood; Wood-based materials; Wood. Paper. Non wovens; Flake board; Populus tremula; Hardwood; Softwood; Volatile organic compound; Pinus; Experimental study; Modeling; Salicaceae; Heat transfer equation; Gas chromatography; Hot pressing; Dicotyledones; Angiospermae; Gymnospermae; Water content; Pinene; Numerical simulation; Coniferales; Spermatophyta; Oriented strand board; Release
• ISSN: 0018-3830; 1437-434X
• DOI: 10.1515/HF.2004.058

A heat transfer model for estimating pinene emissions from hot-pressing strand for the manufacture of flake-board has been constructed from first principles and validated. The model predicts α-pinene emissions of 0.4 kg/1000 kg from a 0.95-cm board, which is within the 0.3–0.6 kg/1000 kg range reported for commercial operations. Most of the emissions originate from the hot 1-mm layer of wood adjoining the platen surface. As a result, residual pinene in the board is depleted at the surface for both commercial and laboratory-prepared boards. Emissions are drastically reduced when the mat is surfaced with a layer of aspen, which prevents the hot platen from directly contacting softwood.