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Akbar Ismi Aziz Pramito
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Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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Kinetika Absorpsi CO₂ dari Gas Buang Kendaraan dengan Menggunakan Absorben KOH pada Reaktor Gelembung Pancaran Sirait, Agnes Tasya Pintauly; Muhammad Yerizam; Akbar Ismi Aziz Pramito
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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This research aims to find out the kinetics of CO₂ absorption reaction of automobile exhaust gas using potassium hydroxide (KOH) as an absorbent in a jet bubble reactor. The jet bubble reactor was chosen because of its ability to increase the contact area between gas and liquid, thereby increasing the absorption efficiency. The variables analyzed in this study include KOH concentration, gas flow rate, and operating temperature. A study was conducted on CO₂ gas absorption in automotive gas using pure KOH alkali base solution and maximizing absorption in CO₂ exhaust gas. This study was conducted using concentration variations. (0.1, 0.2, 0.3 and 0.4 M), which is an important step to reduce the greenhouse effect that will negatively affect the environment.
Pemanfaatan Cangkang Kemiri Sebagai Katalis CaO (Candlenut Shell) yang Terimpregnasi KOH dalam Produksi Biodiesel Minyak Jelantah melalui Reaksi Transesterifikasi Nur Sha’in; Anerasari Meidinariasty; Akbar Ismi Aziz Pramito
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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The growing demand for environmentally friendly and renewable alternative fuels, with biodiesel being a prominent candidate. Waste cooking oil (WCO), a widely available household waste, is a promising feedstock but requires an efficient catalyst to improve the transesterification process. The objective of this research was to investigate the effect of CaO catalyst derived from candlenut shells impregnated with KOH, and to determine the optimum methanol-to-oil molar ratio and catalyst concentration. The results showed that the optimum condition was achieved at a 1:6 molar ratio with 1.5% catalyst, producing biodiesel with a density of 0.877 g/mL, viscosity of 4.6 cSt, acid value of 0.25 mg KOH/g, cetane number of 54.7, and yield of 85%, all in accordance with the Indonesian National Standard (SNI 7182:2015). GC-MS analysis revealed a total fatty acid methyl ester (FAME) content of 99.57%, dominated by compounds such as methyl oleate, methyl stearate, and methyl linoleate, indicating near-complete conversion. These findings confirm the potential of CaO-KOH catalyst from candlenut shell waste as an effective heterogeneous catalyst for producing high-quality and sustainable biodiesel.
Pengaruh Variasi Tekanan Fluida terhadap Air PDAM dengan Unit Pengolahan Air Minum Reverse Osmosis Maharani, Saskia Rizqi; Yuniar; Akbar Ismi Aziz Pramito; Tahdid
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Kualitas air minum yang aman sangat penting untuk kesehatan masyarakat. Penelitian ini bertujuan untuk menganalisis kualitas produk air minum yang diperoleh dari unit pengolahan air minum yang hasil rancangan unit pengolahan air minum oleh penulis dengan berbasis membran reverse osmosis Silvertec ULP-2012-100G dan juga post carbon pada variasi tekanan fluida 4, 5, 6, 7, dan 8 bar. Air baku yang digunakan berasal dari keluaran air PDAM yang sebelumnya diproses melalui beberapa tahapan filtrasi, meliputi filter sedimen, Granular Activated Carbon (GAC), Chlorine, Taste, and Odor (CTO), membran Reverse Osmosis (RO), dan Post Carbon. Produk air minum ini juga mengacu pada Permenkes RI No. 2 Tahun 2023 sebagai standar air minum berkualitas baik yang memenuhi aspek fisika, kimia, dan mikrobiologi. Penelitian ini dilakukan di Laboratorium Teknik Energi Politeknik Negeri Sriwijaya, Palembang. Hasil produk air yang telah melalui membran reverse osmosis maupun post carbon keduanya memenuhi kualifikasi air minum sesuai dengan PERMENKES No. 2 Tahun 2023. Fluks permeat dan % rejeksi pada RO linier dan menghasilkan air dengan tingkat rejeksi yang semakin tinggi seiring meingkatnya tekanan fluida, hal ini membuktikan bahwa tekanan fluida mempengaruhi kinerja membran RO sehingga menghasilkan produk air minum yang baik.
Co-Authors Anerasari Meidinariasty Maharani, Saskia Rizqi Muhammad Yerizam Nur Sha’in Sirait, Agnes Tasya Pintauly Tahdid Yuniar