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All Journal Reaktor Jurnal Teknik ITS IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Indonesian Journal of Chemistry ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia Sewagati Jurnal Teknik Kimia dan Lingkungan Bulletin of Chemical Reaction Engineering & Catalysis
Winardi, Sugeng
Departemen Teknik Kimia Institut Teknologi Sepuluh Nopember
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Energy Engineering Materials Science & Nanotechnology Social Sciences

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Journal : IPTEK The Journal for Technology and Science

 1 
The Effect of Water Contents to Diesel Fuel-Water Emulsion Fuel Stability Suryadi, Joko; Winardi, Sugeng; Nurtono, Tantular
IPTEK The Journal for Technology and Science Vol 30, No 2 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (725.949 KB) | DOI: 10.12962/j20882033.v30i2.4997

Abstract

The declining world oil and gas reserves along with increasing gas emissions from fossil fuel consumption has received serious attention as an urgent problem worldwide. The alternative solution to the problem uses emulsified fuel which is expected to provide better combustion efficiency and will contribute to emission reductions, such as NOx and particulate matter (PM). The one of most important factor in emulsion fuel is its stability. In this work, the effect of water contents to stability of diesel-water emulsion fuels has been investigated. The stability of emulsion fuel related to coalescence and sedimentation formation. The diesel fuel-water emulsification process was carried out in a standard stirred tank consisting of a cylinder tank (93 mm in diameter) and Rushton disk turbine (40 mm in diameter). Materials used consist of diesel oil (Pertamina DEX), demineralized water, surfactants (Lecithin, Triton X-100 and Tween 80). The surfactant used is a mixture of Lecithin - Triton X-100 (76.6%: 23.4%) and Lecithin - Tween 80 (45.5%: 54.5%) at 1% total volume of emulsion. The impeller set in constant speed at 1900 rpm. To reduce emulsification energy consumption, water is added gradually into the tank at 2 mL/min of flowrate. Water content varies at 5%, 10%, 20%, and 40% by total volume of emulsion. Physical properties of emulsion fuel such as viscosity and density at room temperature were investigated periodically. The characterization of emulsion fuel stability was measured by slope value of absorbance ratio at wavelength 450 nm and 850 nm. Sediment formation was periodically by visual observation as emulsion phase percentage. Emulsion droplet size was measured by Dynamic Light Scattering (DLS) method. Physical properties of emulsions such as density and viscosity tend to constant value in order of time. Emulsion fuel with 5% water content has the largest volume of emulsion phase in the rest of time, 83 % for L-T emulsion fuel and 95% for L-Tx. The lowest slope value shown by 5% emulsion fuel water content, -8.657×10-5 for 5% L-T emulsion fuel and -2,084 × 10-4 for 5% L-Tx emulsion fuel. Droplet size measurement of emulsion shown that different amount of added water caused the different droplet size of emulsion.
Study of Hydrodynamics and Overall Gas Hold Up Validation in Bubble Column by Computational Fluid Dynamics Yukh Ihsana; Sugeng Winardi; Tantular Nurtono
IPTEK The Journal for Technology and Science Vol 31, No 1 (2020)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (841.371 KB) | DOI: 10.12962/j20882033.v31i1.5636

Abstract

The study of overall gas hold up has been carried out experimentally with the bed expansion. The superficial gas velocities used for the experiments are 6.369 m/s and 10.616 m/s. The experiment is carried out in a bubble column with inside diameters of 7 cm and a height of 100 cm. Gas from the gas cylinder is supplied through a distributor consisting of a perforated plate and glass beads. The perforated plate has a hole diameter of 1 mm and 0.5 mm. Computational Fluid Dynamic (CFD) using a Eulerian coupled with Population Balance model is developed to predict overall gas hold up and bubble size distribution. The effect of superficial gas velocity, perforated plate diameter, gas properties, and initial liquid level on gas hold up were studied. The use of population balance can significantly improve the overall gas hold-up results compared to constant bubble diameter. It is found that several operating conditions affect the whole gas hold up, namely initial liquid level, superficial gas velocity, and differences in gas properties. While the influence of the difference in perforated plate diameter to overall gas holds up, results are small compared to other operating conditions.
Co-Authors Abdul Halim Abdul Halim Abdul Halim Achmad Roesyadi Adhi Setiawan Agung Nugroho Agung Nugroho Ali Altway Brario Anindito Dwi Setyorini Dwi Setyorini Fadlilatul Taufany Heru Setyawan Hideki Kanda Hideki Kanda Hideki Kanda Iva Maula Kristianto, Fesa Putra Kusdianto Kusdianto Lailatul Qadariyah Ling Ling Luthfia H. Abdillah M Rachimoellah Mochammad Agung Indra Iswara Mochammad Agung Indra Iswara Motonobu Goto Motonobu Goto Motonobu Goto Mukhaimin, Iman Nadiem Anwar Novia Larasati Nurkhamidah, Siti Siti Chasanah Siti Machmudah Siti Machmudah Siti Machmudah Siti Machmudah Siti Machmudah Siti Machmudah Siti Zullaikah Sjarief Widjaja Sumarno Sumarno Suryadi, Joko Tantular Nurtono Wahyudiono Wahyudiono Wahyudiono Wahyudiono Wahyudiono Wahyudiono Wahyudiono Wahyudiono Widiyastuti Widiyastuti Widiyastuti Widiyastuti Widiyastuti Widiyastuti Widiyastuti Yeni Rahmawati, Yeni Yukh Ihsana