Dielectric properties and microwave heating of oil palm biomass and biochar

Arshad Adam Salema; You K. Yeow; Kashif Ishaque; Farid Nasir Ani; Muhammad T. Afzal; Azman Hassan

doi:10.1016/j.indcrop.2013.08.007

Dielectric properties and microwave heating of oil palm biomass and biochar

Arshad Adam Salema
, You K. Yeow
, Kashif Ishaque
, Farid Nasir Ani
, Muhammad T. Afzal
, Azman Hassan

Research output: Contribution to journal › Article › Research › peer-review

159 Citations (Scopus)

Abstract

The conversion of the electromagnetic energy into heat depends largely on the dielectric properties of the material being treated. Therefore, the fundamental understanding of these properties is necessary for designing industrial microwave processing unit. The objective of this study is to investigate the dielectric properties of oil palm biomass and biochar at varying frequency in the range 0.2-10. GHz. The dielectric properties were measured using a coaxial probe attached to a network analyzer. The results indicate the dielectric constant was found to be inversely proportional to the frequency. However, the biomass in the present study did not obey the famous Debye equation and hence, the loss factor was found to be directly proportional to the frequency. The dielectric properties of oil palm shell (OPS) and its biochar were found to be almost similar and higher than oil palm fiber (OPF). Relaxation time and static dielectric constant were also presented in the paper. Lastly, the heating characteristics under MW irradiation confirmed poor microwave absorbing properties of oil palm biomass.

Original language	English
Pages (from-to)	366-374
Number of pages	9
Journal	Industrial Crops and Products
Volume	50
DOIs	https://doi.org/10.1016/j.indcrop.2013.08.007
Publication status	Published - Oct 2013
Externally published	Yes

Keywords

Biochar
Biomass
Dielectric properties
Frequency
Heating characteristics
Microwave

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10.1016/j.indcrop.2013.08.007

Cite this

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title = "Dielectric properties and microwave heating of oil palm biomass and biochar",

abstract = "The conversion of the electromagnetic energy into heat depends largely on the dielectric properties of the material being treated. Therefore, the fundamental understanding of these properties is necessary for designing industrial microwave processing unit. The objective of this study is to investigate the dielectric properties of oil palm biomass and biochar at varying frequency in the range 0.2-10. GHz. The dielectric properties were measured using a coaxial probe attached to a network analyzer. The results indicate the dielectric constant was found to be inversely proportional to the frequency. However, the biomass in the present study did not obey the famous Debye equation and hence, the loss factor was found to be directly proportional to the frequency. The dielectric properties of oil palm shell (OPS) and its biochar were found to be almost similar and higher than oil palm fiber (OPF). Relaxation time and static dielectric constant were also presented in the paper. Lastly, the heating characteristics under MW irradiation confirmed poor microwave absorbing properties of oil palm biomass.",

keywords = "Biochar, Biomass, Dielectric properties, Frequency, Heating characteristics, Microwave",

author = "Salema, \{Arshad Adam\} and Yeow, \{You K.\} and Kashif Ishaque and Ani, \{Farid Nasir\} and Afzal, \{Muhammad T.\} and Azman Hassan",

note = "Funding Information: The authors thank the Ministry of Higher Education (MOHE), Malaysia for providing financial support under Fundamental Research Grant no. 78200 and 78561 . The authors would also like to extent their appreciation to Universiti Putra Malaysia for allowing us to use their facilities. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

month = oct,

doi = "10.1016/j.indcrop.2013.08.007",

language = "English",

volume = "50",

pages = "366--374",

journal = "Industrial Crops and Products",

issn = "0926-6690",

publisher = "Elsevier",

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TY - JOUR

T1 - Dielectric properties and microwave heating of oil palm biomass and biochar

AU - Salema, Arshad Adam

AU - Yeow, You K.

AU - Ishaque, Kashif

AU - Ani, Farid Nasir

AU - Afzal, Muhammad T.

AU - Hassan, Azman

N1 - Funding Information: The authors thank the Ministry of Higher Education (MOHE), Malaysia for providing financial support under Fundamental Research Grant no. 78200 and 78561 . The authors would also like to extent their appreciation to Universiti Putra Malaysia for allowing us to use their facilities. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013/10

Y1 - 2013/10

N2 - The conversion of the electromagnetic energy into heat depends largely on the dielectric properties of the material being treated. Therefore, the fundamental understanding of these properties is necessary for designing industrial microwave processing unit. The objective of this study is to investigate the dielectric properties of oil palm biomass and biochar at varying frequency in the range 0.2-10. GHz. The dielectric properties were measured using a coaxial probe attached to a network analyzer. The results indicate the dielectric constant was found to be inversely proportional to the frequency. However, the biomass in the present study did not obey the famous Debye equation and hence, the loss factor was found to be directly proportional to the frequency. The dielectric properties of oil palm shell (OPS) and its biochar were found to be almost similar and higher than oil palm fiber (OPF). Relaxation time and static dielectric constant were also presented in the paper. Lastly, the heating characteristics under MW irradiation confirmed poor microwave absorbing properties of oil palm biomass.

AB - The conversion of the electromagnetic energy into heat depends largely on the dielectric properties of the material being treated. Therefore, the fundamental understanding of these properties is necessary for designing industrial microwave processing unit. The objective of this study is to investigate the dielectric properties of oil palm biomass and biochar at varying frequency in the range 0.2-10. GHz. The dielectric properties were measured using a coaxial probe attached to a network analyzer. The results indicate the dielectric constant was found to be inversely proportional to the frequency. However, the biomass in the present study did not obey the famous Debye equation and hence, the loss factor was found to be directly proportional to the frequency. The dielectric properties of oil palm shell (OPS) and its biochar were found to be almost similar and higher than oil palm fiber (OPF). Relaxation time and static dielectric constant were also presented in the paper. Lastly, the heating characteristics under MW irradiation confirmed poor microwave absorbing properties of oil palm biomass.

KW - Biochar

KW - Biomass

KW - Dielectric properties

KW - Frequency

KW - Heating characteristics

KW - Microwave

UR - https://www.scopus.com/pages/publications/84883015934

U2 - 10.1016/j.indcrop.2013.08.007

DO - 10.1016/j.indcrop.2013.08.007

M3 - Article

AN - SCOPUS:84883015934

SN - 0926-6690

VL - 50

SP - 366

EP - 374

JO - Industrial Crops and Products

JF - Industrial Crops and Products

ER -

Dielectric properties and microwave heating of oil palm biomass and biochar

Abstract

Keywords

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