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All Journal JDE (Journal of Developing Economies) International Journal of Technology and Education Research
Widayatno, Rudy Laksmono
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Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Other

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Financial Analysis of Green Petroleum Coke as A Coal Blend in Steel Industry to Support National Energy Security Naimah, Khoirun; Sasongko, Nugroho Adi; Widayatno, Rudy Laksmono
Journal of Developing Economies Vol. 6 No. 2 (2021)
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jde.v6i2.24825

Abstract

Green Petroleum Coke (GPC), produced by Pertamina RU II Dumai, is the product of refined petroleum, which still has good quality but has not been utilized to its full potential. Such as Sulfur 0.5%; FC 86.03%; Ash 0.10%; VM 13.82%; Moist 10, 52%; and the calorific value of 7500 kcal/kg. Therefore, one effort that can do is diversification, namely the use of GPC as a mixture of other fuels (fossil) to increase the selling value of GPC. This diversification is also in line with the national energy policy in PP. 79/2014 that the program aims to increase the availability of national energy sources. This study aims to determine the feasibility of using GPC as a coal mixture in Industry (Krakatau Steel) with an overview of economic aspects. Data obtained by qualitative methods consisting of interviews, observation, and documentation. Based on the research results from 2 scenarios, both scenario 1 (GPC 4%) and scenario 2 (GPC 18%), it is found that the NPV is positive, IRR is above the discount rate, and BCR> 1. Thus, the use of GPC as a coal mixture is considered feasible to run and can support national energy security. Keywords: Diversification, Feasibility, Petroleum Coke, Investment DecisionJEL: G11, G32
Technological Challenges and Solutions in Hydrothermal Vent Energy Development for Indonesia's Energy Resilience Ardyanto, Fakhriyan; Thamrin, Suyono; Widayatno, Rudy Laksmono
International Journal of Technology and Education Research Vol. 3 No. 04 (2025): October - December, International Journal of Technology and Education Research
Publisher : International journal of technology and education research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63922/ijeter.v3i04.2576

Abstract

Indonesia's exceptional geothermal position along the Pacific Ring of Fire presents the nation with an opportunity to develop hydrothermal vent energy as a significant renewable resource, with a potential estimated at 29,000 megawatts. However, despite this promise for energy resilience, formidable technological barriers have prevented the practical implementation of deep-sea thermal systems. This study investigates the primary technological challenges through systematic literature analysis and descriptive research, examining six critical domains: material durability and corrosion resistance, subsea engineering design and equipment reliability, thermal energy extraction and efficiency, infrastructure deployment and maintenance, ecosystem protection, and regulatory frameworks. By synthesizing findings from academic research, government reports, and industry expertise, the research reveals both substantial obstacles and emerging solutions. At the same time, challenges are significant, encompassing material degradation, system reliability, thermodynamic efficiency, and deep-sea deployment. Practical pathways forward exist through the use of advanced materials, innovative engineering, rigorous testing, and adaptive environmental management. The study proposes a phased implementation strategy that progresses from research and pilot demonstrations through technology refinement to commercial deployment. This work offers essential guidance for policymakers, engineers, and energy security specialists seeking to harness Indonesia's hydrothermal potential while maintaining environmental sustainability, operational reliability, and advancing national energy resilience.
Co-Authors Ardyanto, Fakhriyan Naimah, Khoirun Nugroho Sasongko Jati, Nugroho Sasongko Thamrin, Suyono