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

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Journal : Scientific Contribution Oil and Gas

 1 
15 PALM OIL BIODIESEL: CHALLENGES, RISKS AND OPPORTUNITIES FOR REDUCING AND REPLACING THE NON-RENEWABLE FOSSIL FUEL DEPENDANCY - A REVIEW Erinto Simbolon; Lies Aisyah
Scientific Contributions Oil and Gas Vol. 36 No. 1 (2013): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.36.1.4

Abstract

Biodiesel is a renewable source of energy which is expected to play a signifi cant role for reducing and replacing the existing non-renewable fossil fuels. Palm oil is one source of biodiesel feed stock which has been used for many years and gave so many advantages such as high oil yield, cheap to produce and to refine, has similar characteristics with petroleum-derived diesel, and has lower emission. However, some issues, such as food stock security, land use changes, and biodiversity extinction, have arisen which need to be considered and solved wisely. Life cycle assessment (LCA) study shows a positive net energy and a net positive sequestration on GHG emission (up to some level of conversion from palm oil to biodiesel)which means biodiesel from palm oil has a high potential to replace fossil fuel and also an environmental friendly fuel.
Analysis On Dimethyl Ether (Dme) Characteristics As A Liquid Petroleum Gas (Lpg) Fuel Substitution For Household Stove Cahyo Setyo Wibowo; Riesta Anggarani; Dimitri Rulianto; Lies Aisyah
Scientific Contributions Oil and Gas Vol. 36 No. 3 (2013): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.36.3.16

Abstract

Increasing growth of population will lead to increasing energy needs; therefore it is necessary to find alternative energy other than fossil fuel. Currently, energy sources in Indonesia are mainly derived from oil and natural gas such as LPG. Starting from 2008, LPG demand increased significantly for households and small industries as a result of government policy on conversion of kerosene to LPG. To meet this demand, the government imports LPG up to 2 million tons per year. In order to overcome LPG crisis, an alternative energy is required to be developed without changing either the distribution system, technical or commercial used. An option among others is dimethyl ether (DME) derived from low calori’s coal gasification. In this research analysis characteristics of DME is compared to LPG (as fuel reference) used. The test methods carried out refers to the specification of LPG issued by Directorate General of Oil and Gas. Based on the results, it shows that the characteristics of the fuel LPG mixed with DME 20% and 50% have some good results particularly on physical and chemical properties, stability and homogeneous of gas. Hence, LPG mixed DME 20% and 50% can be used as a substitute fuel for household stove.
COMPARISON OF BIODIESEL B-20 AND B-30 ON DIESEL ENGINE PERFORMANCES AND EMISSIONS Lies Aisyah; Cahyo Setyo Wibowo; Sylvia Ayu Bethari
Scientific Contributions Oil and Gas Vol. 39 No. 3 (2016): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.39.3.274

Abstract

Biodiesel is renewable energy that is made from renewable sources such as vegetable oil (palm oil, soybean oil or jathropa oil) through a trans-esterification reaction. Biodiesel can be used as a substitute for diesel fuel or as a mixture with diesel fuel. B-20 and B-30 fuel are a biodiesel mixture with diesel fuel which contains 20% biodiesel and 80% diesel fuel and 30% biodiesel and 70% diesel fuel respectively. The aim of this study is to compare the performance tests of B-20 and B-30 on a diesel engine. Comparison of their performance comprises engine power, engine torque, specific fuel consumption (SFC) in various loads and emissions. Result shows that the B-20 and B-30 performance is affected by the chemical-physical characteristics of fuel, such as kinematic viscosity, cetane number, density and calorific values. Performance test results show that B-30 has 1.69% lower engine power and 0.62% higher SFC than B-20 at a full load condition. In contrast, B-30 has better emissions than B-20 with a 6.71% decrease in smoke opacity.
Co-Authors Cahyo S. Wibowo Cahyo Setyo Wibowo Dimaz Warahadi Dimitri Rulianto Dimitri Yulianto Erinto Simbolon Gian Akmal Hadi Mulyadi Kemal Ginanjar Majid Abdurrojak Marsha Katili Maymuchar Nanang Hermawan Nur A. Faturrahman Nur Allif Fathurrahman Nur Allif Faturrahman Nurmajid Abdurrojaq Reza Sukaraharja Riesta Anggarani Risvita B. Anugrah Rizal Zaelani Rossy D. Devitasari Saepul Bahtiar Sylvia Ayu Bethari Wahyu N. Hidayat Widi Sujarwati Yogi Pramudito