Temperature distribution on liquid based on microwave energy

Alias, Nuratiqah (2019) Temperature distribution on liquid based on microwave energy. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Plasma is seen as an electrically neutral ionized gas and highly reactive gas mixture. Plasma also are a quasi-neutral atoms which contains equal number of positively charged ions and negatively charged electrons. Plasma discharge generated by the microwave is one of the applications of plasma for various materials processes. Microwave plasma is used in industry for growth of diamond structure, growth of carbon nanotubes, silicon etching and others. However, the waves generated in custom made microwave are differs with a conventional microwave as it cannot propagates waves properly. Thus, this study focuses on the generation of plasma in air and in liquids by using a 2.45 GHz conventional microwave oven at atmospheric pressure. The temperature distributions of copper electrode and liquid on plasma generation with variation of microwave powers were investigated by using Thermal Imaging Camera (FLIR A516). The liquids used are water, waste engine oil and waste cooking oil. The variation of powers used in conducting the experiment is 17% (low), 33% (medium low) and 55% (medium) power outputs. Plasma generation at the tip of the electrode in air and in liquids was observed. In liquids, the temperature distribution of liquids shows a higher value compared to the electrode according to the increasing microwave power. Waste cooking oil shows the highest value of temperature distribution of electrode and liquids in all microwave powers. Plasma was generated in air but not in liquids. Moreover, the temperature distribution of electrode in air was twice the value of temperature distribution of electrode in liquids

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