Thermal treatment of wood residues and effective utilization of its products to improve rubbberwood manufacturing process

Rizafizah Othaman, Kean Giap Lim, Shunsuke Konishi, Masayuki Sato, Nan Shi, Ryuichi Egashira

Research output: Contribution to journalArticle

Abstract

The main aim of this paper is to improve the current saw milling process by utilization of the products from thermal treatment of wood residues. Firstly, batch thermal treatments of rubberwood sawdust were conducted under various conditions to study the effects of the conditions on the yields and the characteristics of the products, pyroligneous acid and activated carbons. sufficient amounts of crude pyroligneous acid and activated carbon were obtained. In all conditions, the produced pyroligneous acid contained the same amount of components which are essential as preservative, e.g., phenolic compounds. The activated carbon especially that produced under steam atmosphere exhibited a relatively high surface area that is suitable as an adsorbent. Secondly, the model aqueous solution of a single harmful phenolic compound contained in the pyroligneous acid was subjected to batch equilibrium adsorptions with the activated carbon prepared by the above treatment. The activated carbon effectively adsorbed the phenolic compounds in the pyroligneous acid. The overall capacity of the rubberwood activated carbon to fully adsorb any component in pyroligneous acid was considerably higher than the amount of the component produced from the same rubberwood sawdust, showing the feasibility of treating the wastewater containing pyroligneous acid with the activated carbon. Finally, based on these experimental results, we synthesized the outline of an improved sawmilling process: the wood residues are thermally treated to obtain pyroligneous acid, activated carbon, and off-gas; the pyroligneous acid is used as wood preservative instead or the conventional toxic one, the wastewater containing the pyroligneous acid is treated by the activated carbon, and the off-gas with addition of residues is used as a heat and energy source for these additional operations. The proposed method is promising and reliable to give the desired performance to improve the manufacturing process and overcome environmental problems.

Original languageEnglish
Pages (from-to)1149-1158
Number of pages10
JournalJournal of Chemical Engineering of Japan
Volume41
Issue number12
DOIs
Publication statusPublished - 2008
Externally publishedYes

Fingerprint

Activated carbon
Wood
Heat treatment
Acids
Sawdust
Wastewater
Gases
pyroligneous acid
Milling (machining)
Poisons
Steam
Adsorbents
Adsorption

Keywords

  • Activated carbon
  • Pyroligneous acid
  • Rubberwood manufacturing process
  • Thermal treatment
  • Wood residues

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Thermal treatment of wood residues and effective utilization of its products to improve rubbberwood manufacturing process. / Othaman, Rizafizah; Lim, Kean Giap; Konishi, Shunsuke; Sato, Masayuki; Shi, Nan; Egashira, Ryuichi.

In: Journal of Chemical Engineering of Japan, Vol. 41, No. 12, 2008, p. 1149-1158.

Research output: Contribution to journalArticle

Othaman, Rizafizah ; Lim, Kean Giap ; Konishi, Shunsuke ; Sato, Masayuki ; Shi, Nan ; Egashira, Ryuichi. / Thermal treatment of wood residues and effective utilization of its products to improve rubbberwood manufacturing process. In: Journal of Chemical Engineering of Japan. 2008 ; Vol. 41, No. 12. pp. 1149-1158.
@article{381098ac0f1c4e86ba879acce7bf33fd,
title = "Thermal treatment of wood residues and effective utilization of its products to improve rubbberwood manufacturing process",
abstract = "The main aim of this paper is to improve the current saw milling process by utilization of the products from thermal treatment of wood residues. Firstly, batch thermal treatments of rubberwood sawdust were conducted under various conditions to study the effects of the conditions on the yields and the characteristics of the products, pyroligneous acid and activated carbons. sufficient amounts of crude pyroligneous acid and activated carbon were obtained. In all conditions, the produced pyroligneous acid contained the same amount of components which are essential as preservative, e.g., phenolic compounds. The activated carbon especially that produced under steam atmosphere exhibited a relatively high surface area that is suitable as an adsorbent. Secondly, the model aqueous solution of a single harmful phenolic compound contained in the pyroligneous acid was subjected to batch equilibrium adsorptions with the activated carbon prepared by the above treatment. The activated carbon effectively adsorbed the phenolic compounds in the pyroligneous acid. The overall capacity of the rubberwood activated carbon to fully adsorb any component in pyroligneous acid was considerably higher than the amount of the component produced from the same rubberwood sawdust, showing the feasibility of treating the wastewater containing pyroligneous acid with the activated carbon. Finally, based on these experimental results, we synthesized the outline of an improved sawmilling process: the wood residues are thermally treated to obtain pyroligneous acid, activated carbon, and off-gas; the pyroligneous acid is used as wood preservative instead or the conventional toxic one, the wastewater containing the pyroligneous acid is treated by the activated carbon, and the off-gas with addition of residues is used as a heat and energy source for these additional operations. The proposed method is promising and reliable to give the desired performance to improve the manufacturing process and overcome environmental problems.",
keywords = "Activated carbon, Pyroligneous acid, Rubberwood manufacturing process, Thermal treatment, Wood residues",
author = "Rizafizah Othaman and Lim, {Kean Giap} and Shunsuke Konishi and Masayuki Sato and Nan Shi and Ryuichi Egashira",
year = "2008",
doi = "10.1252/jcej.08we166",
language = "English",
volume = "41",
pages = "1149--1158",
journal = "Journal of Chemical Engineering of Japan",
issn = "0021-9592",
publisher = "Society of Chemical Engineers, Japan",
number = "12",

}

TY - JOUR

T1 - Thermal treatment of wood residues and effective utilization of its products to improve rubbberwood manufacturing process

AU - Othaman, Rizafizah

AU - Lim, Kean Giap

AU - Konishi, Shunsuke

AU - Sato, Masayuki

AU - Shi, Nan

AU - Egashira, Ryuichi

PY - 2008

Y1 - 2008

N2 - The main aim of this paper is to improve the current saw milling process by utilization of the products from thermal treatment of wood residues. Firstly, batch thermal treatments of rubberwood sawdust were conducted under various conditions to study the effects of the conditions on the yields and the characteristics of the products, pyroligneous acid and activated carbons. sufficient amounts of crude pyroligneous acid and activated carbon were obtained. In all conditions, the produced pyroligneous acid contained the same amount of components which are essential as preservative, e.g., phenolic compounds. The activated carbon especially that produced under steam atmosphere exhibited a relatively high surface area that is suitable as an adsorbent. Secondly, the model aqueous solution of a single harmful phenolic compound contained in the pyroligneous acid was subjected to batch equilibrium adsorptions with the activated carbon prepared by the above treatment. The activated carbon effectively adsorbed the phenolic compounds in the pyroligneous acid. The overall capacity of the rubberwood activated carbon to fully adsorb any component in pyroligneous acid was considerably higher than the amount of the component produced from the same rubberwood sawdust, showing the feasibility of treating the wastewater containing pyroligneous acid with the activated carbon. Finally, based on these experimental results, we synthesized the outline of an improved sawmilling process: the wood residues are thermally treated to obtain pyroligneous acid, activated carbon, and off-gas; the pyroligneous acid is used as wood preservative instead or the conventional toxic one, the wastewater containing the pyroligneous acid is treated by the activated carbon, and the off-gas with addition of residues is used as a heat and energy source for these additional operations. The proposed method is promising and reliable to give the desired performance to improve the manufacturing process and overcome environmental problems.

AB - The main aim of this paper is to improve the current saw milling process by utilization of the products from thermal treatment of wood residues. Firstly, batch thermal treatments of rubberwood sawdust were conducted under various conditions to study the effects of the conditions on the yields and the characteristics of the products, pyroligneous acid and activated carbons. sufficient amounts of crude pyroligneous acid and activated carbon were obtained. In all conditions, the produced pyroligneous acid contained the same amount of components which are essential as preservative, e.g., phenolic compounds. The activated carbon especially that produced under steam atmosphere exhibited a relatively high surface area that is suitable as an adsorbent. Secondly, the model aqueous solution of a single harmful phenolic compound contained in the pyroligneous acid was subjected to batch equilibrium adsorptions with the activated carbon prepared by the above treatment. The activated carbon effectively adsorbed the phenolic compounds in the pyroligneous acid. The overall capacity of the rubberwood activated carbon to fully adsorb any component in pyroligneous acid was considerably higher than the amount of the component produced from the same rubberwood sawdust, showing the feasibility of treating the wastewater containing pyroligneous acid with the activated carbon. Finally, based on these experimental results, we synthesized the outline of an improved sawmilling process: the wood residues are thermally treated to obtain pyroligneous acid, activated carbon, and off-gas; the pyroligneous acid is used as wood preservative instead or the conventional toxic one, the wastewater containing the pyroligneous acid is treated by the activated carbon, and the off-gas with addition of residues is used as a heat and energy source for these additional operations. The proposed method is promising and reliable to give the desired performance to improve the manufacturing process and overcome environmental problems.

KW - Activated carbon

KW - Pyroligneous acid

KW - Rubberwood manufacturing process

KW - Thermal treatment

KW - Wood residues

UR - http://www.scopus.com/inward/record.url?scp=63049105348&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=63049105348&partnerID=8YFLogxK

U2 - 10.1252/jcej.08we166

DO - 10.1252/jcej.08we166

M3 - Article

AN - SCOPUS:63049105348

VL - 41

SP - 1149

EP - 1158

JO - Journal of Chemical Engineering of Japan

JF - Journal of Chemical Engineering of Japan

SN - 0021-9592

IS - 12

ER -