Studi Performansi Komposit Magnetit/Karbon Sebagai Bahan Fototermal Pada Solar Steam Generation (SSG)

Yuharma, Marta Devega (2021) Studi Performansi Komposit Magnetit/Karbon Sebagai Bahan Fototermal Pada Solar Steam Generation (SSG). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Indonesia sebagai negara maritim hingga saat ini masih berjibaku dengan permasalahan krisis air bersih. Dengan potensi energi matahari serta geografis Indonesia sebagai negara kepulauan, Solar Steam Generation (SSG) diyakini mampu menjadi solusi menjanjikan atas persoalan ini. Salah satu elemen kunci untuk meningkatkan efisiensi dalam perangkat SSG adalah bahan fototermal—konverter energi cahaya menjadi energi termal. Untuk itu, pada penelitian ini dilakukan studi performa magnetit, karbon serta komposit magnetit/karbon sebagai material fototermal untuk meningkatkan laju evaporasi air dalam SSG serta mempelajari pengaruh metode komposit dan variasi rasio massa kedua material ini terhadap performanya sebagai bahan fototermal. Sintesis magnetit dilakukan menggunakan metode elektrokimia bebas surfaktan menggunakan multi elektroda dan konfigurasi monopolar selang-seling. Sedangkan produksi karbon dilakukan dengan karbonisasi Na-lignin hasil delignifikasi sabut kelapa. Kemudian, magnetit dan karbon yang terbentuk akan dikompositkan menggunakan metode fisika dan elektrokimia dengan variabel rasio magnetit dan karbon 2:3, 1:1 dan 3:2. Berdasarkan hasil eksperimen, didapat bahwa massa air yang terevaporasi meningkat secara signifikan dengan penambahan komposit magnetit/karbon 1:1 di permukaan dan sekitar lima kali lebih besar daripada tanpa bahan fototermal. Selain itu, komposit magnetit/karbon 1:1 dapat memanaskan permukaan air hingga suhu 51ºC.
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Indonesia as a maritime country is still struggling with the clean water crisis. With the potential of solar energy and Indonesia's geography as an archipelagic country, Solar Steam Generation (SSG) is believed to be able to be a solution to this problem. One of the key elements for increasing efficiency in SSG devices is photothermal materials—converters of light energy to thermal energy. For this reason, this study conducted a study of the performance of magnetite, carbon and magnetite/carbon composites as photothermal materials to increase the rate of water evaporation in SSG and studied the effect of the composite method and variations in mass ratio of these two materials on their performance as photothermal materials. The synthesis of magnetite was carried out using a surfactant-free electrochemical method using multiple electrodes and alternating monopolar configurations. Meanwhile, carbon production is carried out by carbonization of Na-lignin from the delignification of coconut coir. Then, the magnetite and carbon formed will be composited using physical and electrochemical methods. Based on the experimental results, it was found that the mass of the evaporated water increased significantly with the addition of 1:1 magnetite/carbon on the surface of water and was about five times greater than without the photothermal material. In addition, the 1:1 magnetite/carbon composite could heat water surface temperature up to 51ºC.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Magnetit, Karbon, Fototermal, Solar Steam Generation, Magnetite, Carbon, Photothermal
Subjects:	Q Science > QC Physics > QC320 Heat transfer Q Science > QD Chemistry > QD115 Electrochemical analysis T Technology > TD Environmental technology. Sanitary engineering > TD430 Water--Purification. T Technology > TJ Mechanical engineering and machinery > TJ810.5 Solar energy T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis
Depositing User:	Marta Devega Yuharma
Date Deposited:	22 Aug 2021 02:11
Last Modified:	22 Aug 2021 02:11
URI:	http://repository.its.ac.id/id/eprint/88306

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