Abstract
<p>To reduce dependence on fossil fuel, biomass, e.g. the wood pellet, has been developed in recent years. Indonesia has an abundant source of biomass, e.g. wood and rice husk. This work investigates the combustion characteristics of the wood pellet made of Albizia Chinensis and rice husk. The analyzed combustion properties are ignition delay time, the mass of residue, combustion duration, combustion rate, maximum flame temperature, During the experiment, the rice husk content varies between 0 to 50%. As the rice husk content increases from 0 to 50%, the ignition delay time increases from 6 to 9.9 seconds, the mass of residue increases from 21.2 to 45 % and the combustion rate decreases from 0.55 to 0.52 g/min. In addition, higher rice husk content also decreases the maximum temperature.</p>
Highlights
The use of renewable energy should be further increased to decrease dependence on fossil fuels and greenhouse gas emissions
The processing and use of wood pellet in Indonesia have been significantly growing in recent years as the government of the Republic of Indonesia is eager to achieve 23% renewable energy use in 2025 to decrease CO2 emissions [3]
In addition to its net-zero CO2 emissions and its low price, since the raw materials are from wastes of sawmill and furniture factory, combustion of wood pellet benefits to the environment since it releases relatively low harmful elements, e.g. SO2
Summary
The use of renewable energy should be further increased to decrease dependence on fossil fuels and greenhouse gas emissions. Challenges, remain for wood pellet application in the combustion process, e.g. due to its high water content, high fly ash content, low calorific value, high moisture absorption and much smoke generated during combustion. To address these challenges, Kluska et al [4] suggested wood processing before wood pellet production. The agriculture sector, paddy fields, produces a significant amount of wastes as rice straw and husk They can be a potential source for wood pellet production. Rios-Badran et al [7] reported that the addition of wheat straw, up to 50%wt, to rice husk can increase calorific value and decrease ash content. It is expected to acquire information about the optimum amount of rice husk added so that good combustion characteristics, combustion rate and temperature, can be achieved
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