The Elemental Composition Changes of Spirulina platensis-Synthetic Waste Mixture during the Combustion Analyzed by Energy-dispersive X-ray
Sukarni Sukarni 1,2,* and Lukman Arifianto Andi Saputra 1
1 Department of Mechanical Engineering, State University of Malang, Semarang Street 5, Malang 65145, Indonesia
2 Centre of Advanced Materials for Renewable Energy, State University of Malang, Semarang Street 5, Malang 65145, Indonesia
Abstract
The prospect of microalgae Spirulina platensis-synthetic waste mixture (SPSW) as alternative energy to replace fossil fuels was investigated in term of the elemental composition changes during the combustion process. The microalgae Spirulina platensis (SP) sample was achieved from BBPBAP Jepara, Central of Java, Indonesia. While synthetic waste (SW) sample was taken from the temporary shelter in Malang City. A quantity of 30% of SP and 70% SW were mechanically mixed to warranty the uniform mixture in samples powder. SPSW sample was tested its chemical content by using Energy-dispersive X-ray (EDX). To understand the stage of thermal decomposition, the samples firstly were tested under the thermogravimetric (TG) instrument. The combustion has been performed at a heating rate of 10 oC/min at the temperature range of 25-1000 oC, under 100 ml/min constant flow rate of air atmosphere. From this experiments result could be specified the temperature of onset and end of the decomposition stage. In accordance with the temperature parameters, the new samples were heated up in the furnace with the similar TGs condition. The residuals left over at every stage then were analyzed their elemental composition to evaluate the changes of their content. The TG result showed that SPSW combustion occurred in &
Keywords: combustion; Spirulina platensis-Synthetic waste mixture; elemental composition
Topic: Biomass, Biofuel