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Rice Husk Fuel Pellet: Characterization on Physical and Thermogravimetric (TGA) Combustion Properties
Elita R Widjaya, Sigit Triwahyudi, Rosmeika, Harsono

Indonesian Center for Agricultural Engineering Research and Development, IAARD, Ministry of Agriculture Republic of Indonesia
Jl. Sinarmas Boulevard, Ds. Situgadung, Pagedangan
Tangerang


Abstract

Pelletization has been widely used for the densification of biomass. Recently, the demand for biomass fuel pellet is increasing leading to the use of agricultural waste as the feedstock alternative to the wood pellet. Currently, a commodity of rice husk pellet appears in the international market. In this study, the rice husk was developed into fuel pellet and characterized its physical and combustion properties. The pelleting used a flat-die roller type pelleting machine. The pre-treatments were reducing the size and mixing with a 4% gelatinized tapioca starch as the binder. The single pellet had an average diameter of 8 mm, length of 28.7 mm and weight of 1.8 g/pellet. The rice husk bulk density increased from 145 kg/m3 in raw form into 511 kg/m3 in pellet form. There were no significant different changes in pellet dimension after 14 days of pelleting. The combustion properties were analyzed using thermogravimetric analyses (TGA). The TGA analyses were conducted using oxygen at a flow rate of 50 ml/min; the heating rates were 10o/min, 20o/min and 30o/min heated up to 950oC. This study found that the ignition and the burnout temperatures were at about 276oC and 448oC, respectively. As to the non-woody characteristic of higher cellulose than woody biomass, the rice husk pellet had a higher conversion rate at lower temperatures than that of wood pellet.

Keywords: rice husk, fuel pellet, pellet dimension, TGA analyses

Topic: Energy and agricultural machinery

Link: https://ifory.id/abstract/9bthCR2V7f8y

Conference: The 3rd International Symposium on Agricultural and Biosystem Engineering (ISABE 2019)

Plain Format | Corresponding Author (Elita Rahmarestia Widjaya)

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