Effect of torrefaction temperatures on bio-oil properties from Leucaena leucocephala

อิทธิพลของอุณหภูมิของทอร์รีแฟกชันต่อสมบัตินน้ำมันชีวภาพจากไม้กระถินยักษ์

Name: Onarin Khumsak

Organization : King Mongkut's University of Technology Thonburi. The Joint Graduate School of Energy and Environment. Energy Technology and Management Division

Name: Weerapong Wattananoi

Organization : King Mongkut's University of Technology Thonburi. The Joint Graduate School of Energy and Environment. Energy Technology and Management Division

Name: Nakorn Worasuwannarak

Organization : King Mongkut's University of Technology Thonburi. The Joint Graduate School of Energy and Environment. Energy Division

Name: อรอริน คุ้มศักดิ์

Name: วีรพงษ์ วัฒนะน้อย

Name: นคร วรสุวรรณรักษ์

keyword: Bio-oils

; Pyrolysis

; Leucaena leucocephala

Abstract: Biomass is an important source of renewable energy which is derived from the living mechanicsm such as photosynthesis of plant due to the lower contents of sulfur and nitrogen in the biomass. Pyrolysis is a technology that can directly produce a liquid fuel from biomass which can be readily stored or transported. Howerver, many researches have reported the negative properties of the bio-oils compare with the conventional fuel oil. The undesirable properties of the bio-oils uncluded low heating value, low pH value, incompatibility with conventional fuels, high viscosity, and chemical instability. These undesirable properties of the bio-oils are mainly brought about by the high oxygen content in the biomass. On the other hand, it is known that the oxygen content in the biomass could be reduced by the torrefaction at the temperatures below 300 C. So, in this work, the effect of torrefaction at difference conditions on bio-oil production from Leucaene Leucocephala was studied, It was found that the oxygen content of leucaena decreased from 46.2 wt% to 37.3 wt% when torrefy at 295 C whereas the torrefied leucaena yilds decreased with the in crease in torrefaction temperature. Then, the torrefied leucaena was pyrolysed at 550 C to produce bio-oils. The bio-oils were then fractionated into light oil and heavy oil fractions. Light oil fraction was analyzed by GC-MS technique to examine the effect of torrefaction on the bio-oils properties. It was found that acetic acid and furans were decreased in light oil fraction with the increase in torrefaction temperature. The decrease in acetic acid in the bio-oils resulted in the increase of the pH value of bio-oils. Moreover, it was found that carbon content in solid char increased while the oxygen content slightly decreased with the increase in torrefaction temperature. These results indicated that not only torrefaction process could improve bio-oils properties prior pyrolysis process but also affected the properties of solid char

King Mongkut's University of Technology Thonburi. KMUTT Library

Address: BANGKOK

Email: info.lib@mail.kmutt.ac.th

Created: 2011

Modified: 2012-10-09

Issued: 2012-05-25

บทความ/Article

application/pdf

BibliograpyCitation : KMUTT Research and Development Journal vol. 34, no. 4 (Oct.-Dec. 2011), p. 341-355

CallNumber: 12004795

eng

©copyrights King Mongkut's University of Technology Thonburi

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