Product yield distribution and Essential Oil Composition of Eucalyptus Terminalis Sawdust Pyrolysis

1st International Conference on Engineering for Sustainable World

Oyebanji, J.A.^1 ; Oyedepo, S.O.^1 ; Okekunle, P.O.^2 ; Lasode, O.A.^3 ; Adekeye, T.^4

Department of Mechanical Engineering, College of Engineering, Bells University of Technology, Ota, Nigeria^1

Department of Mechanical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria^2

Department of Mechanical Engineering, Faculty of Engineering and Technology, University of Ilorin, Ilorin, Nigeria^3

Department of Mechanical Engineering, Covenant University, Ota, Ogun state, Nigeria^4

关键词: Correlation coefficient;    Essential oil composition;    GC-MS analysis;    High degree of accuracy;    Product yield distribution;    Proximate analysis;    pyro-oil;    Pyrolysis temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/391/1/012008/pdf
DOI  :  10.1088/1757-899X/391/1/012008

来源: IOP

【 摘 要 】

In this study, pyrolysis of sawdust sample (Western blood-wood- Eucalyptus terminalis) was investigated. Experiments were performed at six temperature levels ranging from 300 °C to 800 °C under N2 atmosphere. The weights of char, tar and gas yields produced in each experiment were measured and recorded in percentage of initial weight of the pyrolyzed sample. Results of the study showed that product yield of Eucalyptus terminalis char, tar and gas of 41.28% at 300 °C, 45.10% at 300 °C and 57.20% at 800 °C, respectively were produced. Proximate analysis shows that volatile matter, fixed carbon, ash content and moisture content of sawdust sample were 75.53%, 15.35%, 1.56% and 7.56%, respectively. Result of the elemental analysis shows that the carbon, hydrogen, nitrogen, oxygen and sulphur contents of the sawdust sample were 54.19%, 7.05%, 0.97%, 37.15%, and 0.64%, respectively. The higher heating value and pH of the sawdust sample are 23.40 kJ/g and 2.30% respectively. This indicate that char and tar yields decrease with increased pyrolysis temperature while gas yield increases as pyrolysis temperature increases for the sawdust sample. The value of the correlation coefficient obtained indicate a fairly high degree of accuracy of the regression models to predict experimental result when used within the temperature range considered in this study. Result of analytical Py-GC/MS shows that the proportion of phenolic compounds identified was more than 50% with trans-2-octadecadecen-1-ol, cis-10-pentadecen-1-ol, 9-octadecenal and methyl-1-cyclohexenyl ketone dominating. This study establishes the fact that pyro-oil can not only be used as a fuel but can also be purified and serves as raw materials for chemical and processing industries.