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All Journal Scientific Contribution Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI
Nurmajid Abdurrojaq
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science

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The Effect of Methanol-Gasoline (M20) and Ethanol-Gasoline (E20) Blends on Material Compatibility Nurmajid Abdurrojaq; Rizal Zaelani; Belva Adam Haley; Nur Allif Fathurrahman; Riesta Anggarani; Cahyo Setyo Wibowo; Maymuchar
Scientific Contributions Oil and Gas Vol. 45 No. 2 (2022): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Alcohol has the potential to be used as an alternative to fossil fuels to reduce total emissions from spark-ignition (SI) engines. The impact of a mixture of 20% methanol and ethanol in gasoline on the compatibility of Ethylene Propylene Diene Monomer (EPDM) and polyamide materials, which are used as fuel hoses in SI vehicles, is presented in this study. The immersion test methodology was employed to study the influence of both types of alcohol on gasoline blend to compatibility properties i.e., hardness and weight change. Based on the result, EPDM and polyamide materials have different characteristics of material compatibility with E20 and M20. Tests on M20 and E20 fuel samples on EPDM material show a higher effect on hardness by 5-9% than pristine gasoline. Additionally, there was no change in the weight of the polyamide material in the RON 90, E20, and M20 test samples. However, there was a change in the hardness of the polyamide material by 6-11% in RON 90, E20, and M20 fuels. Moreover, there was no change in the FTIR spectrum, indicating that there was no dissolution of the EPDM and polyamide materials into the test fuel for 6 weeks of immersion.
Perbandingan Uji Densitas Menggunakan Metode ASTM D1298 dengan ASTM D4052 pada Biodiesel Berbasis Kelapa Sawit Nurmajid Abdurrojaq; Rossy D. Devitasari; Lies Aisyah; Nur A. Faturrahman; Saepul Bahtiar; Widi Sujarwati; Cahyo S. Wibowo; Riesta Anggarani; Maymuchar
Lembaran Publikasi Minyak dan Gas Bumi Vol. 55 No. 1 (2021): LPMGB
Publisher : BBPMGB LEMIGAS

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Parameter densitas merupakan salah satu karakteristik yang penting, baik dari aspek perhitungan kandungan energi maupun faktor konversi satuan dalam jual-beli. Secara eksperimen laboratorium, terdapat dua metode acuan untuk mengukur densitas bahan bakar, yaitu ASTM D1298 dan ASTM D4052. Penelitian ini menyajikan perbandingan hasil pengukuran densitas antara metode manual, ASTM D1298, maupun metode otomatisasi pada ASTM D4052, menggunakan sampel biodiesel berbasis kelapa sawit. Hasil pengukuran densitas biodiesel pada berbagai temperatur, termasuk pengukuran pada temperatur acuan spesifikasi biodiesel di Indonesia, yaitu 40oC, dan temperatur densitas standar internasional, yaitu 15oC. Hasil penelitian menunjukkan, suhu observasi mempengaruhi nilai densitas dari biodiesel. Semakin rendah suhu pengujian maka semakin besar nilai densitas yang dihasilkan, yang teramati pada 2 metode pengujian ini. Pengukuran densitas dengan metode ASTM D1298 memiliki kekurangan untuk suhu observasi yang lebih rendah dari 18°C karena memanfaatkan kondisi visual oleh penglihatan. Dengan metode tersebut pengujian suhu dibawah 18°C untuk mengukur densitas biodiesel berbasis kelapa sawit mengalami bias pembacaan skala hidrometer akibat kondisi pengujian yang mendekati titik kabut biodiesel.
Co-Authors Belva Adam Haley Cahyo S. Wibowo Cahyo Setyo Wibowo Lies Aisyah Maymuchar Nur A. Faturrahman Nur Allif Fathurrahman Riesta Anggarani Rizal Zaelani Rossy D. Devitasari Saepul Bahtiar Widi Sujarwati