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The alternative use of environmentally friendly marine fuel by Indonesian vessel owners complies with IMO regulations. Marine fuels with low carbon and sulfur are alternative fuels to the current fossil fuels used by the shipping industry. Some alternative marine fuels are being used or developed such as LNG, hydrogen, and methanol. LNG is one alternative fuel that is used significantly as a marine fuel in the shipping industry. As one of the LNG producers, Indonesia is still behind in using LNG as an alternative marine fuel. One of the main reasons is the use of conventional marine fuels such as HFO, MDO, MGO and the understanding of LNG as an expensive and high-risk commodity. However, vessel owners face various challenges when selecting alternative fuel, which is associated with price and technology. This study aims to analyze a 600 TEU container vessel by calculating its net present value, the capital recovery factor and life cycle analysis (LCA) to determine whether owners carry out the investment. The result of the economic analysis for the 600 TEU vessel showed that the investment of retrofit for LNG as a marine fuel will be a good choice for owners due to the challenge of capital cost for financing a new vessel. [ABSTRACT FROM AUTHOR]

• An integration model for biomass to methanol supply chain is built. • Using an agent-based simulation–optimization is recommended in analyzing and reporting results. • Two different technological pathways of producing methanol from biomass are benchmarked. • Major decision making is included in the agent-based simulation–optimization model. • Methanol from biogas is more favorable than gasification technology. Methanol is a key product in the chemical industry, not only for producing other higher economic value chemicals, but also serves as a source of renewable energy that can substantially reduce carbon emissions. However, limited data are available on methanol total supply chain costs that consists of production, biomass cost, investment cost and the efficiency of the conversion processes. This paper recommends using an agent-based simulation–optimization in analyzing and reporting results by system elements (techno-economic assessment) or unit processes (life cycle assessment) as well as by the overall product system, of methanol supply chain. Major decision making are included in the agent-based simulation–optimization model to evaluate methanol synthesis pathways. This evaluation includes biomass and methanol ordering policy, capital budgeting during the lifetime of the methanol supply chain, carbon emissions per metric ton of methanol with specific focus on contribution to Indonesia Gross Domestic Product. The principal results obtained from the agent-based simulation show a better conversion technology pathway that leads to lower carbon emissions, higher internal rate of return, shorter payback period, and less price sensitivity of the methanol supply chain. The article proposes methanol from biogas as the chosen conversion technology pathway by considering its capability of sequestering carbon dioxide from bio-digester and lower capital investment, as well as its economic attractiveness to methanol production investors. [ABSTRACT FROM AUTHOR]

Singapore-based Cascadiant, a leading Asian specialist in the integration and deployment of clean energy telecom solutions, has been awarded a contract to deploy methanol-based fuel cells on the island of Kalimantan by Indonesian operator XL Axiata. Cascadiant has also signed a multi-year agreement with another Indonesian operator, Telkom International, to deploy and manage prime and backup power to a newly deployed wireless network. [Copyright &y& Elsevier]