Abstract
The combustion process of Albizia falcataria (AF) sawdust with the addition of natural zeolite (NZ) was observed experimentally using PT 1600 LINSEIS Simultaneous thermal analyzer (STA). The results showed that alkali metal and alkaline metal earth in NZ play an essential role in the process of decomposing the Hemicellulose AF molecule. The results of the molecular analysis show that the chemical balance of the mixture determines the combustion temperature. Excess NZ becomes a thermal burden which slows down the combustion reaction because heat does not sufficiently activate alkali metal and alkaline metal earth in NZ. In a small amount, NZ is less involved in the AF decomposition process. It shows that a mixture of AF and NZ can increase combustion kinetic in the right mix. Addition of 15–20% of NZ decreases the ignition temperature within faster burning rate. Activated alkali metal and alkaline metal earth decompose hemicellulose faster so that they burn completely in minimizing pollutant and maximizing LHV. Greater NZ completes the decomposition much earlier so that at the resting time of the process NZ slightly absorbs heat sinking LHV. The drastic reduction of Ca due to NZ make the fuel is suitable for boiler because Ca is responsible for agglomeration and corrosion.
Highlights
Albizia falcataria (AF) is one of the most widely planted trees in Indonesia because it is quickly harvested at the age of 5–7 years [1, 2]
To get better understanding on the combustion characteristics of sawdust, this paper provides a scientific discussion about the use natural zeolite (NZ) to improve sawdust as fuel
This study describes the combustion of sawdust AF with the addition of Natural Zeolite (NZ) using a thermogravimetric analyzer as a reactor
Summary
Albizia falcataria (AF) is one of the most widely planted trees in Indonesia because it is quickly harvested at the age of 5–7 years [1, 2]. AF is processed into semi-finished material and made into pallets, wooden crates. AF sawmills produce large amounts of sawdust waste. The waste of wood sawdust from AF processing in Indonesia will continue to grow because of the short harvest age of the plant and become an environmental problem. The research on application of sawdust biomass fuel and the effort to improve boiler efficiency have been done in the last decade [3,4,5].
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