Knot, Heartwood, and Sapwood Extractives Related to VOCs from Drying Southern Pine Lumber

Autor:	M. Curry Templeton, Leonard L. Ingram, Richard W. Hemingway, G. Wayne McGraw
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Knot (unit) Softwood chemistry Total volatile Kiln General Chemical Engineering Botany General Materials Science Volatile organic compound General Chemistry Pulp and paper industry Woody plant
Zdroj:	Journal of Wood Chemistry and Technology. 20:415-439
ISSN:	1532-2319 0277-3813
DOI:	10.1080/02773810009351892
Popis:	The presence of knots or heartwood influences the amount and composition of volatile organic compound (VOC) emissions associated with drying of southern pine lumber. Experimental kiln charges of lumber containing 0 to 5% of knot volume gave VOC emissions ranging from 2.86 to 4.25 lb of carbon/dry ton of wood. Studies of emissions from sapwood and knots showed that knots contain about ten times the amount of volatile terpenes found in sapwood. Consequently half of the total volatile emissions would come from 5% of knot volume in sapwood. However, correlation coefficients of knot frequency or volume with VOC emissions obtained from experimental kiln studies were only 0.57 and 0.51, respectively. Southern pine heartwood contains about five times the amount of volatile terpenes found in sapwood and more of the volatile compounds present in heartwood are emitted than from knots. Therefore, small variations in the amount of heartwood result in large changes in VOC emissions in drying southern pine lumber.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ee829f1564b481f7e4e2adf6e40be7b https://doi.org/10.1080/02773810009351892 Zobrazit plný text záznamu