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All Journal Jurnal Teknik Kimia USU Jurnal Distilasi Kinetika Jurnal Teknik Kimia USU
Effendy A, Sahrul
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Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGARUH JUMLAH KATALIS DAN TEMPERATUR PADA PRODUKSI BAHAN BAKAR CAIR DARI BAN BEKAS DENGAN METODE PERENGKAHAN KATALITIK Eldwita, Kinia; Lestari, Suci Dwi; Effendy A, Sahrul; ., Fatria
KINETIKA Vol. 11 No. 2 (2020): KINETIKA 01072020
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Production of the domestic tyre industries in 2019 reached 150,2 million units. With a five-year lifespan for car tire and two-year lifespan for motorcycle tire, it is estimated that millions of used tires are waste and have the potential to damage the environment. Therefore some effort is needed to recycle and convert used tyres to be more useful product. Pyrolysis (catalytic cracking), that is thermal treatment method, can degrade polystyrene which is the constituent material of tyres back into hyrocarbon compounds. This research was conducted to see the effect of temperature and catalyst percentage on liquid fuel that have obtained by using two type of catalysts. From this study it is known that entire samples meet SNI 8220:2017 for diesel fuel 48 where the sample with - Al2O3 catalyst at a temperature of 350 °C gives the best result with density of 0.83204 gram/cm3, viscosity of 3.41908 cSt, and flash point of 62 °C.
PERBANDINGAN PENGARUH EM4 DENGAN RAGI (SACCAROMYCES CEREVISIAE) TERHADAP KADAR BIOETANOL DARI MOLASES Gunawan, Reno; Anwar, Chairul; Effendy A, Sahrul; Taufik, Muhammad; Silviyati, Idha
Jurnal Distilasi Vol 6, No 2 (2021): Jurnal Distilasi
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jd.v6i2.4127

Abstract

Kebutuhan energi dunia saat ini dapat disubstitusi dengan etanol sebagai bahan bakar alternatif. Bahan baku produksi etanol dapat menggunakan molases yang merupakan sisa pembuatan gula tebu namun masih mengandung glukosa dan nutrisi tinggi. Penelitian ini memanfaatkan limbah pabrik gula/molasess sebagai bahan dasar pembuatan etanol. Tetes tebu berupa cairan kental dan diperoleh dari tahap pemisahan kristal gula. Molases masih mengandung gula dengan kadar 50-60%, asam amino dan mineral. Tingginya kandungan gula dalam molases sangat potensial dimanfaatkan sebagai bahan baku bioetanol. Dalam penelitian konversi molases menjadi bioetanol pada bioreaktor menggunakan variabel konsentrasi berat Saccaromyces cerevisiae sebagai variabel bebas. Variabel tetap yang digunakan adalah pH 5, temperatur ruangan, kecepatan pengadukan sebesar 50 rpm, komposisi nutrisi ragi, dan bahan utama (molases) yang digunakan. Dari hasil penelitian didapatkan nilai densitas yang paling mendekati fuel grade densitas bioetanol yaitu sebesar 0,808 gr/mL pada saat menggunakan EM4 sebanyak 17 mL. Namun jika dilihat dari kadar bioetanol yang dihasilkan, hasil yang paling optimum justru terjadi pada saat penambahan ragi sebanyak 13 gram dengan kadar bioetanol sebesar 80 %. Sedangkan untuk nilai kalor yang dihasilkan, hasil yang paling optimum tejadi pada saat menggunakan EM4 sebanyak 17 mL dengan nilai kalor sebesar 8584,364 cal/gr.
Pengaruh Jumlah Sel Elektroda Terhadap Produksi Gas Hidrogen dengan Proses Elektrolisis sebagai Sumber Energi Fuel Cell Erlinawati; Mahesi, Trin Zikir; Saputra, Richo; Febriana, Ida; Effendy A, Sahrul
Jurnal Teknik Kimia USU Vol. 14 No. 1 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i1.18064

Abstract

Hydrogen is an environmentally friendly, carbon-free renewable energy source that can be generated through reactions with oxygen to produce electricity. One method of producing hydrogen is via water electrolysis. The aim of this study was to determine the optimal conditions for hydrogen gas production, specific energy consumption, and the use of hydrogen gas as an energy source for Proton Exchange Membrane (PEM) fuel cells, using potassium hydroxide (KOH) at concentrations of 0.1 M, 0.2 M, 0.3 M, and 0.4 M. The electrolysis process was conducted at a voltage of 10 volts for 30 minutes. The results showed that the highest hydrogen gas production, 0.8927 L, was achieved with 18 electrode cells and a KOH concentration of 0.3 M. The optimal specific energy consumption was 33,269 joules under the same conditions. The maximum efficiency of the PEM fuel cell was 47.25%, while the minimum efficiency was 44.80%
Pengaruh Jumlah Sel Elektroda Terhadap Produksi Gas Hidrogen dengan Proses Elektrolisis sebagai Sumber Energi Fuel Cell Erlinawati; Mahesi, Trin Zikir; Saputra, Richo; Febriana, Ida; Effendy A, Sahrul
Jurnal Teknik Kimia USU Vol. 14 No. 1 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i1.18064

Abstract

Hydrogen is an environmentally friendly, carbon-free renewable energy source that can be generated through reactions with oxygen to produce electricity. One method of producing hydrogen is via water electrolysis. The aim of this study was to determine the optimal conditions for hydrogen gas production, specific energy consumption, and the use of hydrogen gas as an energy source for Proton Exchange Membrane (PEM) fuel cells, using potassium hydroxide (KOH) at concentrations of 0.1 M, 0.2 M, 0.3 M, and 0.4 M. The electrolysis process was conducted at a voltage of 10 volts for 30 minutes. The results showed that the highest hydrogen gas production, 0.8927 L, was achieved with 18 electrode cells and a KOH concentration of 0.3 M. The optimal specific energy consumption was 33,269 joules under the same conditions. The maximum efficiency of the PEM fuel cell was 47.25%, while the minimum efficiency was 44.80%
Co-Authors ., Fatria Chairul Anwar Eldwita, Kinia Elfrida Ratnawati Erlinawati Febriana, Ida Gunawan, Reno Idha Silviyati Mahesi, Trin Zikir Saputra, Richo Suci Dwi Lestari