Measurement and Simulation of Microwave Absorber from Burned Rice Husk

Rice husk is one of the major agriculture waste that has high potential as carbon and energy source and does not been utilized well. The potential was in producing bio oil and pyrolysis is one method that has been established for the purpose. In this research, the pyrolysis of rice husk by using microwave irradiation as the heating source in the existence of microwave absorber char was investigated. The effect of three operating variables, namely microwave power (Watt), reaction time (min) and the amount of microwave absorber (g) were studied. From the study, The highest bio-oil yield were produced about 40.75% at microwave power of 600 W, 20 min reaction time, and 3.5 g amount of microwave absorber with consistent flow of 4 L/min of nitrogen gas. The bio-oil produced were analyzed using gas chromatography and was found contains important chemical compounds such as phenols, ketone, aldehyde and carboxylic acids.

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Test of microwave absorber of rice husk and burned rice husk

2017 International Conference on Advanced Mechatronics, Intelligent Manufacture, and Industrial Automation (ICAMIMIA) ◽

10.1109/icamimia.2017.8387612 ◽

2017 ◽

Author(s):

Mohammad Basuki Rahmat ◽

Afif Zuhri Arfianto ◽

Eko Setijadi ◽

Ahmad Mauludiyanto

Keyword(s):

Rice Husk ◽

Microwave Absorber

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Study of single layer microwave absorber based on rice husk Ash/CNTs composites

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v14.i2.pp929-936 ◽

2019 ◽

Vol 14 (2) ◽

pp. 929 ◽

Cited By ~ 1

Author(s):

Y.S. Lee ◽

F.H. Wee ◽

K.Y. You ◽

Z. Liyana ◽

C.Y Lee ◽

...

Keyword(s):

Carbon Nanotubes ◽

High Temperature ◽

Electromagnetic Radiation ◽

Microwave Absorption ◽

Rice Husk ◽

Relative Permittivity ◽

Rice Husk Ash ◽

Single Layer ◽

Filler Loading ◽

Microwave Absorber

<span>This paper presents the study of microwave absorption single layer microwave absorber based on rice husk ash (RHA) with additional carbon nanotubes (CNTs) filler loading into the composites. The relative permittivity of RHA and CNTs composites (RHA/CNTs) were measured by using Agilent high temperature probe and 85070E software. The CST-MWS software is used to design and evaluate the microwave absorption of RHA and RHA/CNTs with metal backed plate. The microwave absorption of simulated and measured results is compared. The RHA microwave absorber only absorbed maximum, -8 dB at 10.8 GHz of the incident electromagnetic radiation and the RHA/CNTs absorbed less than -15 dB with wider bandwidth over 10.8 GHz to 12.8 GHz compare with RHA composites single layer microwave absorber. The results indicated that the RHA/CNTs composites have enhanced the microwave absorption of RHA composites.</span>

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