Phenolic components of the tar fraction from pyrolysis of rubberwood

Nor Azah Mohd. Ali, . and Halimahton Mansor, . and Khoo K. C., . Phenolic components of the tar fraction from pyrolysis of rubberwood. pp. 221-228. ISSN 0128-1283

Tars collected as by-products of pyrolysis of rubberwood (Hevea brasieliensis Muell.) at several intrinsic temperatures were studied. The tars were distilled into six fractions such as a low boiling fraction (b.p. below 170 C) high boiling fractions (170-210C 210-235 C 235-270 C 270-315 C) and pitch. Increasing the intrinsic temperature above 250 C increased the amount of the high-boiling fraction and pitch. The highest yield of the high-boiling fraction (76) based on the weight of tar was obtained at intrinsic temperature of 500C. The fraction which came out at 270-315Cwas only obtained at intrinsic temperature 700C. There was a significant change in the quantity of the weak acid (phenolic compounds) and neutral portions in the high boiling fraction with intrinsic temperature. The highest amount of weak acids was obtained at intrinsic temperature of between 500 to 700 C. Syringol was found to be the major phenolic component followed by guaiacol and other phenols such as the xylenols cresols catechol and resorcinol.

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Abstract

Tars collected as by-products of pyrolysis of rubberwood (Hevea brasieliensis Muell.) at several intrinsic temperatures were studied. The tars were distilled into six fractions such as a low boiling fraction (b.p. below 170 C) high boiling fractions (170-210C 210-235 C 235-270 C 270-315 C) and pitch. Increasing the intrinsic temperature above 250 C increased the amount of the high-boiling fraction and pitch. The highest yield of the high-boiling fraction (76) based on the weight of tar was obtained at intrinsic temperature of 500C. The fraction which came out at 270-315Cwas only obtained at intrinsic temperature 700C. There was a significant change in the quantity of the weak acid (phenolic compounds) and neutral portions in the high boiling fraction with intrinsic temperature. The highest amount of weak acids was obtained at intrinsic temperature of between 500 to 700 C. Syringol was found to be the major phenolic component followed by guaiacol and other phenols such as the xylenols cresols catechol and resorcinol.

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Item Type:	Article
AGROVOC Term:	Wood
AGROVOC Term:	Pyrolysis
AGROVOC Term:	Charcoal
AGROVOC Term:	Phenolic content
AGROVOC Term:	Boiling
AGROVOC Term:	Fractionation
AGROVOC Term:	Byproducts
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	27 Apr 2025 23:10
URI:	http://webagris.upm.edu.my/id/eprint/22658

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