Studi Eksperimen Pengaruh Pasir Silika Dan Zeolit Dalam Sistem Catalytic Converter Terhadap Emisi Gas Buang Nox.

Meidiananda, Devandra Dharma (2026) Studi Eksperimen Pengaruh Pasir Silika Dan Zeolit Dalam Sistem Catalytic Converter Terhadap Emisi Gas Buang Nox. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mengatasi masalah polusi udara akibat emisi nitrogen oksida (NOx) dan CO2 dari mesin diesel yang diketahui berbahaya bagi kesehatan dan lingkungan. Untuk mengendalikan emisi NOx dan CO2 secara ekonomis, dikembangkan catalytic converter yang menggunakan Katalis berbasis zeolit dan pasir silika, sebagai alternatif dari katalis logam mulia yang mahal. Pengujian dilakukan pada mesin diesel satu silinder yang menggunakan bahan bakar Dexlite. Eksperimen meliputi empat jenis variasi komposisi katalis: tanpa katalis (standar), zeolit 100%, zeolit 75% dikombinasikan dengan pasir silika 25%, dan komposisi seimbang (zeolit 50% dan silika 50%). Pengujian ini dilakukan dengan memvariasikan RPM Mesin pada kecepatan putaran 1600 RPM, 1800 RPM, dan 2000 RPM serta variasi beban mesin pada 1000 watt, 2000 watt, dan 3000 watt. Hasil penelitian menunjukkan bahwa variasi zeolit 50% dan silika 50% memberikan performa paling unggul dan stabil. Pada beban puncak 3000 Watt (1800 RPM), komposisi ini mampu mereduksi NOx sebesar 15,2% (menjadi 713,6 ppm) dan menurunkan CO2 sebesar 10,8% pada 2000 RPM. Meskipun variasi zeolit 75% dan silika 25% efektif pada beban rendah, ditemukan kenaikan emisi CO2 hingga 5,24% pada beban 3000 Watt (1600 RPM) yang juga terjadi pada variasi zeolit 100%. Fenomena kenaikan CO2 ini mengindikasikan keberhasilan katalis dalam mengonversi polutan CO dan HC menjadi CO2 melalui reaksi oksidasi. Secara keseluruhan, keseimbangan komposisi zeolit dan silika 50:50 terbukti paling efektif dalam menjaga efisiensi reduksi emisi di berbagai kondisi operasional mesin.
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This study aims to address air pollution issues caused by nitrogen oxide (NOx) and CO2 emissions from diesel engines, which are known to be hazardous to health and the environment. To control these emissions economically, a catalytic converter was developed using zeolite and silica sand-based catalysts as an alternative to expensive noble metal catalysts. Testing was conducted on a single-cylinder diesel engine using Dexlite fuel. The experiments included four variations of catalyst composition: without catalyst (baseline), 100% zeolite, 75% zeolite combined with 25% silica sand, and a balanced composition of 50% zeolite and 50% silica. The tests were performed across various engine speeds (1600, 1800, and 2000 RPM) and load variations (1000W, 2000W, and 3000W). The results indicated that the 50% zeolite and 50% silica variation provided the most superior and stable performance. At a peak load of 3000 Watts (1800 RPM), this composition reduced NOx by 15.2% (to 713.6 ppm) and lowered CO2 by 10.8% at 2000 RPM. Although the 75% zeolite and 25% silica variation was effective at low loads, an increase in CO2 emissions of up to 5.24% was observed at a 3000 Watt load (1600 RPM), which also occurred with the 100% zeolite variation. This increase in CO2 indicates the successful conversion of CO and HC pollutants into CO2 through oxidation reactions. Overall, the balanced 50:50 zeolite-silica composition proved to be the most effective in maintaining emission reduction efficiency across various engine operating conditions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Catalytic Converter, Diesel, Emisi, Silika, Zeolit
Subjects:	Q Science > QD Chemistry > QD501 Catalysis. Catalysts. T Technology > TD Environmental technology. Sanitary engineering > TD883.5 Air--Pollution T Technology > TD Environmental technology. Sanitary engineering > TD886.5 Motor vehicles--Motors--Exhaust gas--Environmental aspects. V Naval Science > V Naval Science (General)
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Devandra Dharma Meidiananda
Date Deposited:	03 Feb 2026 08:01
Last Modified:	03 Feb 2026 08:02
URI:	http://repository.its.ac.id/id/eprint/131841

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