Analisa Pengaruh Penggunaan Abu Sekam Padi dan Tanah Liat pada Sistem Pengendali Kadar NOx

Setyawan, Biagy Ahmad (2025) Analisa Pengaruh Penggunaan Abu Sekam Padi dan Tanah Liat pada Sistem Pengendali Kadar NOx. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Emisi nitrogen oksida (NOx) merupakan salah satu polutan udara berbahaya yang dihasilkan dari proses pembakaran mesin diesel, yang berkontribusi terhadap pencemaran udara dan berdampak negatif pada kesehatan manusia serta lingkungan. Penelitian ini bertujuan untuk mengevaluasi efektivitas catalytic converter berbahan dasar tanah liat dan abu sekam padi dalam menurunkan emisi NOx pada mesin diesel satu silinder. Bahan katalis disiapkan dalam tiga variasi komposisi: 100% tanah liat, 75% tanah liat dan 25% abu sekam padi, serta 50% tanah liat dan 50% abu sekam padi. Katalis dibentuk dalam bentuk silinder berongga, dikeringkan, dan dipasang pada housing catalytic converter untuk diuji pada mesin diesel Yanmar TF85-MHDI. Pengujian dilakukan pada tiga tingkat putaran mesin (1600, 1800, dan 2000 RPM) serta empat variasi beban (1000W hingga 4000W). Emisi NOx diukur menggunakan gas analyzer, sementara RPM mesin divalidasi dengan tachometer. Hasil penelitian menunjukkan bahwa seluruh variasi katalis memberikan penurunan emisi NOx yang signifikan dibandingkan dengan kondisi tanpa katalis. Variasi 50% tanah liat dan 50% abu sekam padi menunjukkan hasil paling optimal dengan rata-rata penurunan emisi sebesar 39,1%, diikuti oleh variasi 75% tanah liat dan 25% abu sekam padi sebesar 29,5%, serta 100% tanah liat sebesar 18,8%. Efektivitas tertinggi tercatat pada kondisi beban tinggi dan putaran mesin 2000 RPM. Abu sekam padi berperan penting dalam meningkatkan kinerja katalis melalui proses adsorpsi dan reaksi katalitik yang lebih efisien. Penelitian ini membuktikan bahwa kombinasi tanah liat dan abu sekam padi dapat dijadikan solusi alternatif yang murah, ramah lingkungan, dan aplikatif untuk pengendalian emisi gas buang mesin diesel.
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Nitrogen oxides (NOx) emissions are among the most harmful air pollutants produced during diesel engine combustion processes, contributing to air pollution and posing significant risks to human health and the environment. This study aims to evaluate the effectiveness of a catalytic converter made from a clay and rice husk ash mixture in reducing NOx emissions from a single-cylinder diesel engine. The catalyst material was prepared in three composition variations: 100% clay, 75% clay and 25% rice husk ash, and 50% clay and 50% rice husk ash. The catalysts were formed into hollow cylindrical shapes, dried, and installed in a specially designed catalytic converter housing for testing on a Yanmar TF85-MHDI diesel engine. Tests were conducted at three engine speeds (1600, 1800, and 2000 RPM) and four load variations (1000W to 4000W). NOx emissions were measured using a gas analyzer, while engine RPM was validated with a tachometer. The results showed that all catalyst variations significantly reduced NOx emissions compared to the condition without a catalyst. The 50% clay and 50% rice husk ash variation provided the best performance with an average emission reduction of 39.1%, followed by the 75:25 variation at 29.5%, and the 100% clay variation at 18.8%. The most substantial reduction occurred at high loads and 2000 RPM engine speed. Rice husk ash played a crucial role in enhancing the catalytic performance through more efficient adsorption and catalytic reactions. This study demonstrates that the combination of clay and rice husk ash can serve as an effective, low-cost, and environmentally friendly alternative material for diesel exhaust emission control systems.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Abu Sekam Padi, Emisi NOx, Energi Ramah Lingkungan, Katalis, Mesin Diesel, Tanah Liat, Catalyst, Clay, Diesel Engine, Environmentally Friendly Energy, NOx Emissions, Rice Husk Ash.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Biagy Ahmad Setyawan
Date Deposited:	04 Aug 2025 11:36
Last Modified:	04 Aug 2025 11:36
URI:	http://repository.its.ac.id/id/eprint/125313

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